Pump World

Fluid Mechanics Laboratory Centrifugal Pump Investigation(6)

2010-06-12T04:35:00.000-07:00

March 24, 2009 – 12:23 am

V. Centrifugal Pump Report Treatment.
A formal written report is not required for this experiment. You are responsible for the plots, table,
and the discussion questions listed below. Your responses to the discussion questions are to be typed
with 1-1/2 to double spacing, using a character font no smaller than 12 point on 8

CGA CENTRIFUGAL PUMP(WITH OPEN IMPELLERS)

2010-06-11T03:35:00.000-07:00

(2900r.p.m.)
-Insulation Class B/F
-IP44 Protection

Centrifugal Pumps Material:
-Pump body: Cast Iron
-Impeller: Brass
-Motor Shaft: Hi-Cr 45 plated # Steel/2Cr13 # Stainless Steel/SS # 304 Welding shaft
-Mechanical seal: Ceramic/Graphite

Centrifugal Pumps Application:

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CHF CENTRIFUGAL PUMP(MEDIUM FLOW)

2010-06-10T02:35:00.000-07:00

(2900r.p.m.)
-Centrifugal Pumps Insulation Class B/F
-IP44 Protection

Material:
-Centrifugal Pumps body: Cast Iron
-Impeller: Brass
-Motor Shaft: Hi-Cr 45 plated # Steel/2Cr13 # Stainless Steel/SS # 304 Welding shaft
-Mechanical seal: Ceramic/Graphite

Application:

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Adjustable Speed Drives As Applied To Centrifugal Pumps

2010-06-09T01:35:00.000-07:00

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Adjustable Speed Drives As Applied To Centrifugal Pumps -1

2010-06-08T00:35:00.000-07:00

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Adjustable Speed Drives As Applied To Centrifugal Pumps -2

2010-06-06T23:35:00.000-07:00

May 6, 2009 – 6:11 pm

Figure 6. Combined Curves

Figure 7 shows a typical Centrifugal Pump and efficiency curve for operation
at a fixed speed. It can be seen that for fixed speed operation,
the efficiency varies as flow is adjusted. For adjustable speed
operation however, the affinity laws predict that the Centrifugal Pump curve
will shift downwards for reduced speed and the efficiency curve
will shift to the left in such a way that efficiency will remain constant
relative to points on the Centrifugal Pump curve for reduced flows.

Figure 7. Fixed Speed Pump Efficiency

FLOW CONTROL TECHNIQUES
Historically, fixed speed AC motors have driven centrifugal pumps
and reduced flow has been achieved by using control valves as
shown in figure 8. Closing the valve reduces the flow by increasing
the friction in the system. The modified system curve and the
new operating point can be represented as shown in figure 9.
Note that the desired reduction in flow has been achieved, but at
the expense of increased system pressure relative to 100% flow.

An alternative approach to valve control is shown in figure 10.
Reducing the Centrifugal Pump speed causes the Centrifugal Pump curve to shift downwards
as shown in figure 11. Since the operating point is still
determined by the intersection of the reduced speed Centrifugal Pump curve
and the system curve, it is possible to achieve the same reduced
flow as achieved with a valve, but at significantly less pressure.

Figure 9. Throttle System

In addition to energy savings, which are discussed in detail later,
operation at reduced pressures can result in longer Centrifugal Pump seal
life, reduced impeller wear, and less system vibration and noise.
These benefits could provide additional savings over potential
energy savings.

Figure 10. Adjustable Speed Control
ENERGY SAVINGS
The Centrifugal Pump output power, or hydraulic power, can be expressed as:
Horsepower
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Centrifugal Pumps modes of Operation

2010-06-05T22:35:00.000-07:00

March 29, 2009 – 11:11 pm

Centrifugal Pumps ,The SMC Flex controller provides the following modes of operation as Standard:

Soft Start
This method covers the most general applications. The motor is
given an initial torque setting, which is user adjustable. From the
initial torque level, the output voltage to the motor is steplessly
increased during the acceleration ramp time, which is user
adjustable.
Centrifugal Pumps Selectable Kickstart
The kickstart feature provides a boost at startup to break away
loads that may require a pulse of high torque to get started. It is
intended to provide a current pulse, for a selected period of time.
Current Limit Start
Centrifugal Pumps ,This method provides current limit start and is used when it is
necessary to limit the maximum starting current. The starting current
is user adjustable. The current limit stating time is user adjustable.
Dual Ramp Start
This starting method is useful on applications with varying loads,
starting torque, and start time requirements.Centrifugal Pumps , Dual Ramp Start offers
the user the ability to select between two separate start profiles with
separately adjustable ramp times and initial torque settings.

Centrifugal Pumps Full Voltage Start
This method is used in applications requiring across-the-line
starting. The SMC controller performs like a solid-state contactor.
Full inrush current and locked-rotor torque are realized. The SMC
may be programmed to provide full voltage start in which the output
voltage to the motor reaches full voltage in 1/4 second.
Linear Speed Acceleration
With this type of acceleration mode, a closed-loop feedback system
maintains the motor acceleration at a constant rate. The required
feedback signal is provided by a DC tachometer coupled to the
motor (tachometer supplied by user 0
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Centrifugal Pumps Optional modes of Operation

2010-06-04T21:35:00.000-07:00

March 31, 2009 – 3:03 am

Centrifugal Pump Control - Start and Stop
This option is used to reduce surges during the starting and stopping of a Centrifugal Pump by smoothly accelerating and decelerating the motor. The microprocessor analyzes the motor variables and generates commands which control the motor and reduce the possibility of surges occurring in the system. The Centrifugal Pump control module also provides a built-in anti-backspin timer.

Centrifugal Pump Braking Control
SMB Smart Motor Braking
This option provides motor braking for applications that require the motor to stop faster than a coast to rest. Braking control, with automatic zero speed shut off, Centrifugal Pump is fully integrated into the compact design of the SMC controller. This design facilitates a clean, straight forward installation and eliminates the requirement for additional hardware such as braking contactors, resistors, timers, and speed
sensors. Centrifugal Pump The microprocessor based braking system applies braking current to a standard squirrel-cage induction motor. The strength of the braking current is programmable from 150
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Centrifugal Pumps Description or Features

2010-06-03T20:35:00.000-07:00

April 3, 2009 – 2:54 am

Centrifugal Pump Electronic Motor Overload Protection
The SMC Flex controller incorporates, as standard, electronic motor
overload protection. This overload protection is accomplished
electronically with an I2t algorithm.
When coordinated with the proper short circuit protection, overload
protection is intended to protect the motor, motor controller, Centrifugal Pump and
power wiring against overheating caused by excessive overcurrent.
The SMC Flex controller meets applicable requirements as a motor
overload protective device.Centrifugal Pump
The controller’s overload protection is programmable, providing the
user with flexibility. The overload trip class consists of either OFF,
10, 15, 20 or 30 protection. Centrifugal Pump The trip current is programmed by
entering the motor full-load current rating, service factor, and
selecting the trip class.
Thermal memory is included to accurately model motor operating
temperature. Ambient temperature insensitivity is inherent in the
electronic design of the overload.
Stall Protection and Jam Detection
Motors can experience locked-rotor currents and develop high
torque levels in the event of a stall or a jam. Centrifugal Pump These conditions can
result in winding insulation breakdown or mechanical damage to the
connected load. Centrifugal Pump The SMC Flex controller provides both stall
protection and jam detection for enhanced motor and system
protection. Stall protection allows the user to program a maximum
stall protection delay time from 0
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Centrifugal Pumps Description or Features

2010-06-02T19:35:00.001-07:00

The SMC Flex controller meets applicable requirements as a motor overload protective device. Centrifugal Pump The controller’s overload protection is programmable, providing the
user with flexibility. The overload trip class consists of either OFF, 10, 15, 20 or 30 protection. Centrifugal Pump The trip current is programmed by entering the motor full-load current rating, service factor, and selecting the trip class.

Thermal memory is included to accurately model motor operating temperature. Ambient temperature insensitivity is inherent in the electronic design of the overload. Stall Protection and Jam Detection Motors can experience locked-rotor currents and develop high torque levels in the event of a stall or a jam. Centrifugal Pump These conditions can result in winding insulation breakdown or mechanical damage to the connected load. Centrifugal Pump The SMC Flex controller provides both stall protection and jam detection for enhanced motor and system
protection.

How does a centrifugal pump works?

2010-02-08T04:51:00.000-08:00

Do you know how a centrifugal pump works?

It is indeed interesting to learn how this equipment works. A centrifugal pump operates by converting kinetic energy into potential energy measurable as static fluid pressure at the outlet of the pump. The famous Bernoulli's principle is applied in this process.

With the mechanical action of an electric motor, the rotation of the pump impeller exerts kinetic energy to the fluid via centrifugal force. The fluid is then drawn from the inlet piping into the impeller intake eye (inlet) and is accelerated outwards through the impeller vanes to the volute and outlet piping (outlet).

As the fluid exits the impeller, if the outlet piping is too high to allow flow, the fluid kinetic energy is converted into static pressure. If the outlet piping is open at a lower level, the fluid will be released at greater speed. This can be further explain later when we cover the aspect of net positive suction head (NPSH).

Learn about heat exchanger tubing here.

Fabrication of a Centrifugal Pump

2010-02-08T04:49:00.000-08:00

This video shows the steps to fabricate a simple centrifugal pump. The pump is fabricated by teams of two students in ENGR 120 at Louisiana Tech University. The entire pump is modeled using solid modeling software, and each student team's impeller is rendered on a rapid prototyping machine from ABS plastic.

History of centrifugal pump

2010-02-08T04:44:00.000-08:00

Centrifugal pump is undeniably a very important equipment in the processing industry. Hence, it is better for us to know what is the basic and history of the pump.

Well, according to Reti, a Brazilian soldier and historian of science and technology, the first machine that could be considered or regarded as a centrifugal pump was a mud lifting machine which appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini. This machine inspired the construction and engineering of better pump. This then lead to the emergence of a true centrifugal pumps which was developed around 1600's, when Denis Papin made one with straight vanes. The curved vane was introduced by British inventor John Appold in 1851. However, it was not certain how the centrifugal pump is powered.

Single Stage Centrifugal Pump

2010-02-08T04:43:00.001-08:00

This is an update of my Previous Post. I Thank everyone for their helpful Comments. This was designed and animated using 3D Max.

What is a centrifugal pump

2010-02-08T04:37:00.000-08:00

A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure of a fluid in a process system. It is commonly used to move liquids through a piping system. The fluid which can be oil and water enters the pump (inlet) impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the downstream piping system. Centrifugal pumps are used for large discharge through smaller heads. A centrifugal pump is normally powered by electricity. To save power, instead of setting the pump to be switched on and off, it is better to install inverter. This inverter will create a soft start and soft stop of the centrifugal pump, hence saving the power.

Centrifugal Pump

2009-06-24T06:44:00.000-07:00

A centrifugal pump is a pump that is rotodynamic in nature that employs the use of a turning impeller to increase a liquids pressure. These are commonly used to move liquids through piping systems. The liquid enters in the pump following a path near its axis which is rotating. After entry, its speed is quickened by the impeller, which leads to the fluid flowing in the outward direction. After entry into the diffuser, it makes an exit into the piping system downstream, and that's why these pumps prove to be a great help due to the fact that they make larger discharges via smaller head.

The inspiration for the centrifugal pump is believed to have originated from a water lifting machine that was invented by the Italian engineer Francesco di Giorgio Martini, in 1475, that according to a Brazilian historian is thought to be the prototype of a pump that applies centrifugal force. The first true centrifugal pump was invented in 1600, by Denis Papin. However, Papin's pump had straight vanes instead of curved ones, and centrifugal pumps began to have curved vanes no earlier than 1851, introduced by the British inventor John Appold.

A centrifugal pump functions by converting the moving force of kinetic energy, which is often a result of a rotating electric motor or turbine, to an heightened static liquid pressure. Bernoullui's principle describes this action. As the pump impeller rotates, it imparts kinetic energy to the fluid as it is being drawn in from the impeller eye and is forced outward to the periphery. The fluids kinetic energy changes as it exits the impeller and is converted to static pressure due to the change in area the fluid experiences in the volute section. This static pressure occurs because the area the fluid experiences in the volute section is changed. One of the main factors for this is the volute shape of the pump casing or the vanes that are responsible for this conversion. The main purpose of the diffuse is to slow down the liquid and convert the kinetic energy into flow work and as a result, the pressure on the downstream side of the pump increases, causing flow.

Centrifugal pumps have their fair share of problems of course, including Erosion, Corrosion, Overheating Due to Low Flow, Leakage, and Surge, and thus they need to me regularly maintained. The Energy Usage of a centrifugal pump can be estimated quite easily, depending on the flow required, the height lifted, and the total length of the pipeline.

George Edmondson is an accomplished writer about Centrifugal Pumps. For more information on Centrifugal Pumps visit http://www.centrifugalpumpguide.com

Pump Information and Detail

2009-06-04T09:12:00.000-07:00

Pumping of liquids is almost universal in chemical and petrochemical processes. The many different materials being processed require close attention to selection of materials of construction of the various pump parts, shaft sealing, and the hydraulics of the individual problems. A wide variety of pumps types have been developed to satisfy the many special conditions found in chemical plant systems; however, since all of these cannot be discussed here, the omission of some does not mean that they may not be suitable for a service. In general, the final pump selection and performance details are recommended by the manufacturers to meet the conditions specified by the process design engineer. It is important that the designer of the process system be completely familiar with the action of each pump offered for a service in order that such items as control instruments and valves may be properly evaluated in the full knowledge of the system.

A pump is a physical contrivance that is used to deliver fluids from one location to another through conduits. Over the years, numerous pump designs have evolved to meet differing requirements.

The basic requirements to define the application are suction and delivery pressures, pressure loss in transmission, and the flow rate. Special requirements may exist in food, pharmaceutical, nuclear, and other industries that impose material selection requirements of the pump. The primary means of transfer of energy to the fluid that causes flow are gravity, displacement, centrifugal force, electromagnetic force, transfer of momentum, mechanical impulse, and a combination of these energy-transfer mechanisms. Gravity and centrifugal force are the most common energy-transfer mechanisms in use.

Pump designs have largely been standardized. based on application experience, numerous standards have come into existence. As special projects and new application situations for pumps develop, these standards will be updated and revised. Common pump standards are:

1. American Petroleum Institute (API) Standard 610, Centrifugal Pumps for Refinery Service.
2. American Waterworks Association (AWWA) E101, Deep Well Vertical Turbine Pumps.
3. Underwriters Laboratories (UL) UL 51, UL343, UL1081, UL448, UL1247.
4. National Fire Protection Agency (NFPA) NFPA-20 Centrifugal Fire Pumps.
5. American Society of Mechanical Engineers (ASME).
6. American National Standards Institute.
7. Hydraulic Institute Standards (Application).

These standards specify design, construction, and testing details such as material selection, shop inspection and tests, drawings and other uses required, clearances, construction procedures, and so on.

The most common types of pumps used in a chemical plant are centrifugal and positive displacement. Occasionally regenerative turbine pumps, axial-flow pumps, and ejectors are used.
Modern practice is to use centrifugal rather than positive displacement pumps where possible because they are usually less costly, require less maintenance, and less space. Conventional centrifugal pumps operate at speeds between 1200 and 8000 rpm. Very high speed centrifugal pumps, which can operate up to 23,000 rpm and higher, are used for low-capacity, highhead applications. Most centrifugal pumps will operate with an approximately constant head over a wide range of capacity.

Positive displacement pumps are either reciprocating or rotary. Reciprocating pumps include piston, plunger, and diaphragm types. Rotary pumps are: single lobe, multiple lobe, rotary vane, progressing cavity, and gear types. Positive displacement pumps operate with approximately constant capacities over wide variations in head, hence they usually are installed for services which require high heads at moderate capacities. A special application of small reciprocating pumps in gas processing plants is for injection of fluids (e.g. methanol and corrosion inhibitors) into process streams, where their constant-capacity characteristics are desirable.

Axial-flow pumps are used for services requiring very high capacities at low heads.

Regenerative-turbine pumps are used for services requiring small capacities at high heads. Ejectors are used to avoid the capital cost of installing a pump, when a suitable motive fluid (frequently steam) is available, and are usually low-efficiency devices. These kinds of pumps are used infrequently in the gas processing industry.

To properly accomplish a good and thorough ratinghizing of a centrifugal pump, the plant system designer should at a minimum do the following.

1. Understand the fundamentals of performance of the pump itself.
2. Understand the mechanical details required for a pump to function properly in a system.
3. Calculate the friction and any other pressure losses for each "side" of the pump, suction, and discharge.
4. Determine the suction side and discharge side heads for the mechanical system connecting to the pump.
5. Determine the important available net positive suction head (NPSH,) for the pump suction side mechanical system, and compare this to the manufacturer's required net positive suction head (NPSH,) by the pump itself. This requires that the designer makes a tentative actual pump selection of one or more manufacturers in order to use actual numbers.
6. Make allowable corrections to the pump's required NPSH (using charts where applicable) and compare with the available NPSH. The available must always be several feet (mm) greater than the corrected required.
7. Make fluid viscosity corrections to the required performance if the fluid is more viscous than water.
8. Examine specific speed index, particularly if it can be anticipated that future changes in the system may be required.
9. If fluid being pumped is at elevated temperature (usually above 90o F (32.2o C )), check temperature rise in the pump and the minimum flow required through the pump.
10. Make pump brake horsepower corrections for fluids with a specific gravity different from water. Select actual driver (electric motor, usually) horsepower in order that horsepower losses between the driver and the pump shaft will still provide sufficient power to meet the pump's input shaft requirements.
11. If the pump has some unique specialty service or requirements, recognize these in the final sizing and selection. Consult a reliable manufacturer that produces pumps for the type of service and applications and have them verify the analysis of your system's application.

Get other all about pump types, selection, problem in pumps, pump design etc. in :

pump | deep well pump | jet pump

My name is Bustanul Arifin. A chemical engineer who graduate from reputable university in the world. Now I am working as consultant in ethanol plant design, and petrochemical construction contractor. This article was written based on my experience and many text books. Please feel free to visit my website :

pump | deep well pump | jet pump

Textbook reference :

1. Branan, C. R., "The Process Engineer's Pocket Handbook", Vol. 2, Gulf Publishing Co., 1983.
2. Brown, G.G., "Unit Operations", John Wiley and Sons, Inc. , 1950.
3. Evans, E L., "Equipment Design Handbook For- Rejneries and Chemical Plants", Vol. 1, 2nd Ed., Gulf Publishing Co., 1979.
4. GPSA Engineering Data Book, "Gas Processors Suppliers Association", Vol. 1, 10th Ed.. 1987.
5. Kern, R., "How to Design Piping for Pump-Conditions," Chemical Engineering, 1975.
6. Kirk, R.E. and Othmer, D.F., "Ensyclopedia of Chemical Technology", Interscience Ensyclopedia, Inc. , 1951.
7. Ludwig, E. E., "Applied Process Design for Chemical and Petrochemical Plants" Vol. 1, Gulf Publishing Co., 1977.
8. Perry, R. H., and Chilton, C. H., "Chemical Engineers' Handbook" New York: McGraw-Hill, Inc, 1973.
9. Standards for Steam Jet Ejectors, 3rd Ed., Heat Exchange Institute, New York, N.Y.
10. WALAS, Stanley M., "Chemical Process Equipment - Selection and Design",
(Butterworth-Heinemann Series in Chemical Engineering). Boston, MA: Butterworth-Heinemann, a division of Reed Publishing (USA) Inc., 1998.

12 Volt Pumps For Motorhomes, Caravans, Campers and Small Boats

2009-04-27T06:26:00.000-07:00

Boats, caravans, and motorhomes use 12 volt pumps in several applications. Fresh water (Potable/drinking water) supply pressure and delivery is maintained by pumps. Sewage or effluent water may be removed with the help of a pump. But what type of pump should be used in a particular application?

All pumps work on the principle of creating a vacuum into which liquid is drawn. Liquid moves into the pump because of the air pressure on the surface of the large body of liquid into which the pump is placed or connected with by an intake pipe or hose. There are two basic ways in which that vacuum is created, and these differences are reflected in centrifugal pumps and diaphragm pumps.

Centrifugal pumps are very simple. A rotating impeller inside the pump forces water away from the centre of the passage, thus creating the vacuum. This design makes them cheap to manufacture, easy to maintain, and submersible. However, they are usually not self-priming, and can't handle many solids in the liquid matrix. They also cannot maintain an even pressure. There is a seal which prevents water from leaking into the motor. If these pumps run dry for very long the seal can be damaged.

Diaphragm pumps are larger and more complicated. They use a drive shaft to raise and lower a flexible diaphragm with each stroke. This changes the pressure inside the pump alternately opening and closing an intake and outflow valve, drawing water through. Diaphragm pumps require more maintenance, are not usually submersible because water should not contact the mechanical parts. They are initially more expensive. Diaphragm pumps are self-priming. Certain diaphragm pumps can handle dirty water and even debris because the liquid does not flow through the moving parts. They can also maintain a steady pressure, however without an accumulator tank water flow can pulse. Also, diaphragm pumps need to be mounted properly to prevent undue vibration.

Motorhome water pumps and caravan water pumps are usually centrifugal pumps. In addition to a submersible pump, an inline booster centrifugal pump can be added. Popular submersible brands of 12V pumps are the Whale GP881,Comet Elegant Immersion; Comet VIP Plus Immersion; and Comet GEO Plus Immersion. These range from a delivery rate of 8 litres/minute to 20 l/m. In size they vary from 38 to 43mm in diameter, making it an easy matter to slip them into the opening of water tanks. The Comet pumps have the ability to be run dry for up to 2 hours without damage, where as the Whale pumps strictly advise against being run dry.

Comet and Reich make inline booster centrifugal pumps. The delivery rate of these ranges from 11 to 18 l/m. These are slightly larger than the submersibles.

Diaphragm 12volt pumps for motorhomes and caravans are the Shurflo, Posiflo, and Fiamma. These pumps range in capability from 15 to 40 pounds per square inch pressure, at delivery rates of 7 to nearly 22 litres per minute. The largest of these is the Fiamma Aqua Pump capable of 10 litres per minute @21.75 psi (1.5bar). With a stainless steel filter and non-toxic parts these pumps are highly sanitary. They are resistant to deposits of scale and rust. Diaphragm pumps will not be damaged if it runs dry.

Marcle Leisure can supply various pump accessories such as additional filters, tubing, foot switches, non-return valves, expansion tanks (accumulators), and inline pressure switches.

Many 12 volt pump options are available from Marcle Leisure for caravan, motorhome, and small boat applications. By paying attention to the various types and brands of pumps and their capabilities the owner of a recreational vehicle can meet any need associated with the movement of liquids.

For a list of available
pumps and their accessories, visit http://marcleleisure.co.uk

Hayward's Super Pump Series - the Very Latest Technology

2009-04-03T08:38:00.001-07:00

People who don't own pools have no idea of the time and resources that go into maintaining them. Not only is there the pool itself that has to be cleaned and maintained but there is all of the other unseen mechanical components that require input, with the pump being heart of your pools plumbing system.

New Convenience Features and Energy Efficiency

For years Hayward pool pump research engineers and designers have been hard at work coming up with new innovations for improving on pool pumps in general. The end result is the Hayward Super Pump series that is more energy efficient and contains features that make owning and maintaining a pool pump much easier.

See Through Hayward Pool Pump Screen Covers

For instance, Hayward Super Pumps all now feature a clear, see through screen sump cover. This means that unlike other standard pool pumps, the pump screen can be checked without having to remove the cover. Also new finger friendly flip levers make removing the cover a cinch.

Cooler Quieter Longer Lasting Hayward Pool Pumps

Hayward Super Pumps are also quieter and run cooler. It's all the direct result of new high tech cooling fans that operate far more efficiently. No more loud humming coming from the pool pump and a cooler pump is also a longer lasting pump.

Complete Lineup of Online Spare Parts

Spare parts for Hayward pool pumps are so easily available online. So now anything that you will need for your pump over the lifetime of your pool is simply a mouse click away on your computer. Look up your Hayward pool pump model, find the part you need on the parts schematics chart, click your mouse and it's in the mail the next day.

Article by Alejandro Rumskis. Want to learn more on this? Come over to my site for the best articles on Dui Minnesota penalties and you'll even find some on Dwi laws in Minnesota.

Heat exchanger tube is a very important part of a shell and tube heat exchanger. Learn about it!

Proper Sump Pump Maintenance is Vital to Keep Your Basement Dry

2009-04-03T08:20:00.000-07:00

When do most homeowners find out that their sump pump has failed? When it is too late! It is raining cats and dogs, rain water is contributing to the ground water and the water table is rising quickly. As the ground water level reaches the float activation set point. Regularly the sump pump will kick on and keep the water level below the basement slab, thereby alleviating the hydrostatic pressure below the basement floor.

Sadly, many homeowners find out the hard way that their sump pump is not working properly. The water table rises beyond a controllable level and hydrostatic pressure begins forcing water through floor cracks and floor/wall joints. The outcome is increased moisture levels inside the basement, which can lead to poor indoor air quality conditions, and in severe cases can lead to standing water filling up inside the basement causing havoc and misery.

The most important thing homeowners with basement waterproofing systems (sump pumps, basement drainage, etc.) can do is complete regular factory recommended maintenance procedures included in the manual that came with the sump pump. If a basement waterproofing company or local contractor/plumber installed the system they should have given you the original product manual. Many waterproofing companies offer annual maintenance to assist you in the maintenance of your sump pump(s) and waterproofing systems. It is highly recommended that if you decide to go forward with contracted maintenance that you ask lots of questions about how the company will service the system.

Regular maintenance should include removal of debris and obstructions from the sump liner and any cleaning of filters or screens that are attached to the sump pump. It is recommended that drains and sump pump systems are flushed with hot water regularly. This ensures that any debris or iron bacteria colonies do not build up and become obstructions to the flow of water. Do not run any type of hazardous cleaning chemicals (bleach, ammonia, detergents, etc.) through any drain or sump pump systems.

If your sump pump has a removable screen (usually at the base) most waterproofing professionals should remove them and use a wire brush to clean the impeller of the pump. Proper maintenance should also include testing of the sump pumps operation and the float switch (if applicable). Water discharge lines should also be checked to ensure that the water being pumped out is flowing freely and to an area that will not allow the water to seep back into the basement.

If open drains are part of your basement waterproofing system (bulkhead trenches, garage trenches, etc.) be sure to test them for efficiency frequently. If your basement waterproofing system includes a battery back-up, it should also be tested and maintained. Any open-cell batteries should be filled to factory recommended levels with distilled water.

As mentioned earlier in this posting, always follow the factory recommended maintenance procedures. It is recommended that you have maintenance completed at least twice a year. The most important times to maintain your waterproofing systems are after prolonged dormant times and before typical heavy usage times. Every area is different but experience with Massachusetts weather patterns has proven that February (Winter thaw) and September bring the most sump pump failure complaints.

Lois Bartels is the owner of Green Bear Innovations, Massachusetts greenest home improvement company offering green insulation, basement waterproofing, foundation repair, sump pump installations, mold and radon assessment and remediation... We use energy efficient products, recycled/recyclable materials and hold a high standard for resource conservation during all installations. We are based in Reading, MA and serve the entire state and also RI, CT and NH.

Condensed Facts About Centrifugal Pumps

2009-03-25T07:20:00.000-07:00

A centrifugal pump is defined as a rotodynamic pump that makes use of a rotating impeller to raise the rate of a fluid. If this is your first time to hear of this kind of equipment, you might perceive it as something that is quite complicated to use. But the truth is a centrifugal pump is considered one of the most uncomplicated forms of equipment. Its primary purpose is to switch the energy of an engine or an electric motor into kinetic energy or velocity, which will generate pressure to compel the fluid to come out.

Basically, the changes in the energy occur in two major parts of the pump-the volute and the impeller. The volute is the inactive part that turns the kinetic energy directly into pressure. Meanwhile, the impeller is the revolving part that turns the driver energy directly into the kinetic energy.

How It Uses Centrifugal Force

Centrifugal force is achieved when liquid goes into the pump suction as well as to the eye of the impeller. Once the impeller revolves, it instantaneously turns the liquid sitting in the hollows between imparts centrifugal acceleration and vanes outward. Now, as the liquid goes out from the eye of the impeller, a low pressure area is also created in the eye permitting more amount of liquid to come out into the pump inlet.

Multistage Centrifugal Pumps

A multistage centrifugal pump contains two or more impellers. These impellers can be installed on similar or different shafts. Basically, a multistage comprises two vital functions: to eject a large amount of liquid and to generate a high head.

If you want to produce a high head, the impellers should be installed on similar shaft, following a series pattern. Meanwhile, a large quantity of liquid can be released once the impellers are installed on different shafts, following a parallel pattern.

However, multistage centrifugal is only one among the three types of centrifugal stages of the pump. There is also the single stage pump; this stage is composed of only one impeller and is suggested for low head service. Another stage is the two-stage pump; this is made up of two impellers installed in series form for medium head service.

Three General Categories

Centrifugal pump is made up of three general categories: radial flow; mixed flow; and axial flow. Radial flow is a kind of pump wherein the pressure is increased completely by centrifugal force. Mixed flow, on the other hand, is a kind of centrifugal pump wherein the pressure is improved partially by centrifugal force and partially by the lift of the impeller's vanes on the fluid. Lastly, axial flow is a kind of centrifugal wherein the pressure is improved by the lifting action or propelling of the impeller's vanes on the liquid.

Impeller and Shafts: Vital Parts

Both the impeller and shafts are important parts of centrifugal pump. Primarily because certain speed is used to identify pump impellers depending on their proportions and types. Meanwhile, shaft is made up of shaft sleeves that go into the outer facade of the seal gland plate to guard the shafts from corrosion, wear, and erosion.

George Edmondson is an expert writer specializing on centrifugal pumps. Expand your knowledge on centrifugal pumps. Visit http://www.centrifugalpumpguide.com to obtain relevant information that is guaranteed to help you understand more about centrifugal pump without spending a single penny

Hydraulic Pumps

2009-01-06T05:48:00.000-08:00

Hydraulic pumps convert mechanical energy and motion into hydraulic fluid power and are usually powered by gas or electricity. However, hand and air driven pumps are also utilized. There are three main types of hydraulic pumps used in the fluid power industry, namely vane pumps, gear pumps, and piston pumps. These are all positive displacement pumps, meaning that they transfer a calculated quantity of pressurized hydraulic fluid into a hydraulic system. This fluid progresses to the necessary component and its pressure is reconverted to mechanical force.

A general hydraulic pump design can be further categorized into specific groups. For example, piston pumps can be radial, axial, in-line reciprocating, or axial bent-axis piston pumps. Vane pumps are either cam or sliding vane pumps. Pumps can be further subcategorized according to the modifications made for special applications. These pumps show a great variety in design. Irrespective of the design, all hydraulic pumps are to be used with fluids of definite viscosity. Changes in fluid viscosity will cause altered performance, often lowering the efficiency. Most pumps get damaged by any solid particles in hydraulic fluid, and, hence, require a filtration system.

A hydraulic pump is a very important component of construction, manufacturing, and machining equipment. It is responsible for a machine's precision, its efficiency, and overall performance of an entire system. Various materials are used in hydraulic pumps to minimize wear and provide consistent performance. The type of material used varies according to pressures and temperatures that a hydraulic system will undergo. A number of plastics, synthetic rubbers, and steel alloys are used in the manufacturing of hydraulic pumps. High-strength alloys and polymers are used in high-pressure systems.

When choosing a pump, it is recommended to consider factors like operating pressure, temperature, and frequency. For applications requiring minimal pressures, less expensive, low-pressure pumps are available. Some examples of hydraulic pump manufacturers are Lifco Hydraulics, Inc., Flint Hydraulics, Inc., HYSECO, Inc., and Craft Fluid Systems.

Pumps provides detailed information on Pumps, Water Pumps, Heat Pumps, Sump Pumps and more. Pumps is affiliated with Sun Powered Heat Pumps.

The Importance of a Battery Backup Sump Pump System

2008-12-05T05:36:00.001-08:00

Basements can quickly fill with water and ruin carpet, furniture, drywall and everything else so it is extremely important to me to have a good backup sump pump system in place. Most Basement battery sump pump batteries are shipped dry without acid so that they will remain fresh until you activate them. Filling the battery can be done easily. Many companies have developed an even more impressive system called the Ultrasump. This system is actually a second sump that piggie-backs on top of your original system.

A will often come with an alarm. If the water rises too high, the alarm will sound while the backup sump pump continues to run. A battery backup sump pump is essential if the basement is finished, especially with carpeting or hardwood floors. A controller automatically switches from electricity to the battery in the event of a power outage so there is no needs to worry while your home, away, at work or vacation. The peace of mind that a battery powered back up sump pump offers is priceless.

Electricity is not 100% reliable as many storms can cause power failures. You can feel safer with a backup protection device in place that runs without electric power? Most major plumbing or larger national size home centers carry a large selection of electric generator accessories perfect for all types of electric generators. If you finish off your basement a backup sump should be on the top of your list.

Sump pumps are usually hardwired into a home's electrical system, and may have a battery backup. Some even use the home's pressurized water supply to power the pump, eliminating the need for electricity. Sump pumps are installed in the lowest section of the basement and will pump out any water that has entered the basement before it starts flooding the basement floor. As groundwater makes its way into the basement, it is diverted into the sump pit or sump basin. Sump pumps normally work in combination with a sump pit. The sump pit is simply a hole dug into the ground, generally in the basement of a house, which allows water to collect into it. This sump basket is made of a high strength plastic and installed by the plumber during the rough plumbing phase of construction.

A sump pump, in general, is a category that encompasses a number of styles of pumps that are used to pump out collected fluid. This classification includes bilge and ballast pumps, centrifugal pumps, cantilever pumps, sewage pump pumps, submersible sump pumps and utility pumps, among others. Sump pumps are rated in gallons per minute (GPM). They also are rated by motor capacity. Sump pumps may also have a battery backup installed to ensure continuous operation.

Submersible pumps are quieter and tend to have a longer life because their sealed, oil-cooled motors are protected from moisture and dust. For the typical 1/3 HP sump pump, the average lift ability is 25 feet and flow capacity is about 25 GPM. Submersible pumps are designed to be submerged in water and sit on the bottom of the sump. The on/off switch, which is attached to the pump, can be a ball float connected to an internal pressure switch or a sealed, adjustable mercury-activated float switch. Submersible pumps are entirely mounted inside the pit, and they have a specially seal to prevent electrical short circuits.

The usual life span of a sump pump depends directly on how often the sump tank fills up, the depth of the properties water table, if any debris has made their way into the basket and even the quality of the pump that was installed. The sump pump is definitely something not to take lightly and to have the piece of mind that the basement you just spent a lot of money on will not get ruined during the next big rain or power outage.

DiCicco Building Company has been a Michigan Remodeling contractor for over 20 years. We are also leaders in Kitchen and Bath Remodeling along with being an award winning custom residential home builder. We also specialize in Finished Basements and home additions.

A Tutorial to Pumps

2008-11-02T07:06:00.000-08:00

Pumps are amazing mechanical devices and an important invention. They are used to move gas or liquid from one pressure are to another pressure area. They are used in a variety of ways from providing water to providing heat to providing energy. Pumps have been around since the 3rd century and are still going strong today.

There are two main categories of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps have little leakage as they used sealed chambers to force the fluid or gas. Dynamic pumps use momentum to move the fluid or gas and the chambers are not sealed. In these two categories there are various types of pumps.

The following list explains the different types of pumps most commonly found in residential and industrial settings. These are a good representation of the many styles and models of pumps that are manufactured. Most pumps are made for a specific use and that is represented in this list as well.

-A centrifugal pump can handle a large load. They are used most often with oil or chemical processing. They have an impeller that forces the liquid or gas into a rotary motion. This rotary motion cause pressure to build.

-Electromagnetic pumps are made to move liquid sodium and potassium. They are used in the cooling systems of nuclear reactors. These pumps use electrical conductors and magnetic pipes.

-Jet Pumps use high velocity to move fluid. They require a jet of steam or water to carry the fluid through it. The jet pressure makes a vacuum that sucks more fluid. They are so powerful that they are most often used to move water from deep wells.

-A screw pump is also called a positive displacement pump. It is a widely used pump because it does not form clumps when pumping solids and keeps a constant speed.

These four pump types only represent a portion of the pumps on the market. They are, however, the most popular models.

Pumps are found in many environments. They range from industrial plants to a home water system. The way a pump works depends largely on the category of pump it is and the type of pump it is. The use is then based on these factors. All pumps work under the same principles, though. Pumps use pressure to move liquid or gas to a different location.

http://pumpshub.com Everything you need to know about Pumps.

Cleaning Chemical Application

2008-10-17T20:31:00.001-07:00

Finally the homeowner can learn the little tricks of the cleaning trade that the professional power washing contractors have been using for years to make their work look better, go faster and be more cost efficient.

The application of chemicals is one of the longest standing controversies in the power washing industry. There are just as many opinions on the correct method of doing so as there are chemical applicators. The one thing most contractors seem to agree on is that no single method will serve all circumstances efficiently. Of all the different methods, the three most often used are 1) down stream injection [after the pump], 2) chemical before the pump [through the pump], 3) and the chemical applicator pumps.

Each of these methods has their benefits as well as their limitations. Down stream chemical injection is most often used on cold pressure washers because of low cost and the ability to turn the chemical on and off at the wand. Chemical injection before the pump is most often used on hot pressure washers because of the ability to apply chemicals with hot water, which makes them more effective. And chemical application pumps are used where the chemicals are not compatible with the pressure washer.

The down stream injector is the most common to the power wash industry. They are coupled in-line and operate on waterpower. The water velocity is what creates the needed vacuum (venturi) to draw the chemical and mix it with the water flow. Changing the size of the discharge orifice regulates the water velocity. This is most often accomplished using a roll over valve, a double nozzle head (see page 4), or a dual lance wand (see page 12). Most manufacturers of these injectors claim that their draw rates are from 10% to 20%. With a few exceptions, I have found this accurate. The problem with this is that many people are requesting a draw rate in excess of 50%, which is only available with an injector that is especially designed to fit at the end of a spray lance (see page 13). The problems with this injector are cost and due to the location, it's a cumbersome package to handle for some applications. The contractors who most commonly request higher draw rates are ones who are applying chlorine to exterior surfaces such as buildings, decks, and fences. The reason for their concern is that the strongest concentrate of sodium hypochlorite (chlorine) available is 15%. When this is mixed at a 10% to 20% ratio in the injector, many people feel that it is too weak to adequately clean and remove mildew. From this springs another question, the advisability of using chlorine as a cleaning agent to begin with. We could pursue this to infinity and never reach a consensus.

Another problem with this type of injector is due to the restriction created in the ¼" pressure hose that is used as an integral part of a telescoping wand. A down stream injector will not work in most cases with a ¼" pressure hose. This is because the ¼" hose creates too much restriction and reduces the water flow (increases the back pressure) causing the injector not to work.

Other things that can inhibit the flow of water, thereby decreasing velocity and stopping the vacuum that is required to draw chemical, are: 1) discharge hose in lengths of 200 feet or more, 2) installing the injector before the hose reel, water heater, or other restrictive devices, 3) and using certain types of trigger guns that are too restrictive.

One advantage of downstream injection is that you will use less chemical. On the downside you will clean slower because you will be applying the chemical under low pressure and rinsing on high pressure. With up stream injection {before the pump} you will apply your soap as you are washing on high pressure and rinse on high pressure as well. You will use more chemical this way but you will clean faster and more thoroughly. Also down stream injector allows the operator to turn the chemical draw on and off from the gun whereas upstream chemical injection [before the pump] requires that the operator return to the machine to turn the chemical on and off. As you can see down stream chemical injection can save many steps and a lot of time over the course of a day. Another major benefit down stream chemical application over before the pump injection is that you can use chemicals that are corrosive in nature (like acids) because they never enter the pump, unloader valve, or heater coils.

Upstream chemical injection is done by restricting the inlet water to the pump. High-pressure pumps used on hot high-pressure washers can pull a vacuum. Therefore, these pumps do not have to be pressure fed and they have the ability to draw water and chemicals from water tanks and chemical tanks. The vacuum is created with a restrictor barb or gate valves in the inlet plumbing to the pump. The operator has to return to the pressure washer to turn the chemical on and off with a metering valve. These units have the advantage in any strength of chemical can be mixed with the inlet water. However, the chemical (usually a heavy duty alkaline detergent) must be compatible with the components in a pressure washer. Most quality high-pressure washer detergents are compatible with the internal parts of a pressure washer (example: R-109 or DNB-1430.

When considering the selection of injectors it is important for you to understand how they work and to determine their value to your style of cleaning. It is a well-established fact that chemical is cheaper than labor and that the best way to assure return business is to do the best job that we can.

The two types of chemical applicator pumps that are most commonly used in the mobile power wash industry are compressed air sprayers {pump up style} and electrical diaphragm pumps. Pump up sprayers are often used because of budgetary reasons. The mobile power wash industry is probably one of the least expensive fields of endeavor in which you can start and successfully run a business. Therefore, you will find many people searching for cheap answers to expensive problems. Mobile power wash contractors are on the whole some of the most inventive people that you will ever meet. Pump up sprayers are an inexpensive answer to an expensive problem that they face regularly.

There are different styles and makes of these sprayers ranging in price from $ 14.00 to $ 145.00. The lower priced sprayers being the kind that you would find in a garden shop or hardware store that are designed for homeowner use. The more expensive sprayers are of the type that you might find at a contractor supply or a pressure washer distributor. Some of the differences would be better stronger construction, viton seals and diaphragms, stainless steel corrosion resistant tanks or wetted parts and epoxy coated steel. You will find all makes and models in use in the industry but most often you will find the medium priced sprayers being used because they offer some longevity without the extreme expense. Some people won't use any other type of sprayer because they really prefer this method, but generally, they have chosen this method for economic reasons. Pumps up sprayers are available for spraying everything from acid to deck sealer. Although repair parts are available for these types of sprayers in many cases they are not worth rebuilding, depending upon the initial cost of the sprayer. When nothing else fits your budget, they can be quite useful. I have used these types of sprayers and for small jobs they are tough to beat. You can be in and out in less time than it takes to clean up a larger more sophisticated unit.

The electrical pumps most often used are self-priming, positive displacement pumps driven by permanent magnet motors. They utilize a heavy-duty ball bearing/offset cam assembly, which drives a reciprocating two-piston plate. A diaphragm is clamped between the inner and outer pistons sealing the pumping chamber and when actuated creates an alternating suction and pressure condition that opens and closes the inlet and outlet check valves. They will have either an internal bypass system or an on demand system. These pumps are available in 12 volt DC and 120 volt AC and 240 volt AC powered models. The diaphragm that should be used for corrosive materials is made of viton because it is the most resistant to the type of chemicals used in the mobile power wash industry. You will also need to use a valve assembly with viton parts. This will be incorporated in the new pump that you purchase when you specify the use is for corrosives. These pumps are available in different output volumes {expressed in gallons per minute}. These volumes will range from ½ to 6 gallons per minute. The size that one would choose would be directly related to the type of work that he is doing. Obviously if you were applying aluminum brightner to a truck you would not want to use a 5 gpm pump. Nor would you want to use a ½ gpm pump to apply deck brightner when preparing it to be sealed.

In choosing, the appropriate pump for your specific needs some of the things that you should consider is: the availability of electricity, the type of electricity available and the kind of chemicals to be applied. One of the more popular pumps used in the industry is the 12 volt model. This is because even if you don’t have a heavy duty charging system on your pressure washer and a large storage battery you probably do have some sort of vehicle with a 12-volt charging system that you can attach it to. This means that you can be totally self reliant without the added expense of a power generator. The 120-volt AC model is more popular to the contractor who will be working in areas where this type of power is readily available. Typically, you will find that these units are being used in kitchen grease exhaust cleaning, residential and industrial work where this type of power is readily available. The 240 volt pump is seldom used, because this type of power is seldom found around a power wash job site. In my opinion that high of voltage would be excessively dangerous.

These pumps (most popular bands are Shurflo and Flojet) will vary in price from $ 65.00 to $180.00 and are totally rebuildable. If you are applying large amounts of chemical on a repetitive basis, this is definitely a method to consider. You can control the chemical mixture and the flow rate much better than most other ways of chemical application.

Last but certainly not least is the application of chemicals through the use of foam generators {foamers}. There are many different styles of foamers on the market today. They vary in price ranging from $50.00 to $900.00. The advantage in applying chemicals using this method is that foam clings to vertical surfaces longer than less viscous liquids thus providing a greater dwell time for the chemical to work.

There are many other ways of applying the chemicals that are used in this industry. These are the most commonly used methods.

Larry Hinckley is Senior Technical Advisor for Delco Cleaning Systems of Fort Worth. Larry has 41 years experience in electro-mechanical design and maintenance with 20+ years experience in all aspects pressure washer maintenance, repair, design, and cleaning techniques.

Several of his articles have been published by Cleaner Times, Pavement Magazine and The Portland Cement Association.

In an effort to raise industry standards he has presented for the Power Washers of North America, the International Kitchen Exhaust Cleaning Association and the National Air Duct Cleaners Association.

Video Credits: Delco's Videos RK-20 and RK-21, RK-41 & RK-42 (Operation and Maintenance of Gas Engine, Diesel Fired Hot High Pressure Washers) Video # 301 (Starting Your Own Mobile Power Wash Company)Video #404 Restaurant Vent-A-Hood Cleaning and Video #10 (Pressure Washers, Bells, and Whistles Review).

As a side bar he teaches Pressure Washer Maintenance.

Delco Cleaning Systems of Fort Worth
2513 Warfield Street, Fort Worth, Texas 76106-7554.
Phone: 800-211-0287; Fax:817-625-2059

Submersible Pumps

2008-10-07T19:20:00.001-07:00

A submersible pump is one that has a sealed motor, fitted in a pump body. The total assembly is immersed in the fluid that needs to be pumped. The main advantage of this type of pump is that it can offer a considerable amount of lifting power, as it does not rely on external air pressure.

A submersible pump has a system of mechanical seals that is used to prevent the fluid being pumped from entering the motor, resulting in a short circuit. A pump can either be attached to a pipe or a flexible hose.

Some of the types of submersible pumps are bladder pumps, bilge and ballast pumps, borehole pumps, booster pumps, and centrifugal pumps. Other examples are condensate pumps, dewatering pumps, fountain pumps, grinder pumps, micro pumps, sampling pumps, trash pumps, utility pumps, and well pumps. Some submersible pumps are manufactured for particular applications. These pumps are water submersible pumps, sewage submersible pumps, 12-volt submersible pumps, sand submersible pumps, irrigation submersible pumps, and solar submersible pumps. Solar submersible pumps have many uses and are suitable for slow and steady water transfer into a holding tank.

Submersible pumps are found in many appliances. Single stage pumps are utilized for drainage, sewage pumping, common industrial pumping, and slurry pumping. Multiple stage submersible pumps are normally used for water abstraction. These pumps can also be found in oil wells. Moreover, submersible pumps can be positioned directly in a pond and require comparatively little installation. These pumps are also relatively silent.

The four main specifications that should be considered while choosing a submersible pump are maximum expulsion flow, maximum discharge pressure, horsepower, and discharge size.

Earlier, the main drawback of submersible pumps was that its pump seal could rupture and release oil coolant into the water. However, newer pumps are magnet-driven, and no longer require a coolant. These magnet-driven pumps are more expensive, but they consume less electricity.

Pumps provides detailed information on Pumps, Water Pumps, Heat Pumps, Sump Pumps and more. Pumps is affiliated with Sun Powered Heat Pumps.

Heat Pump Prices

2008-09-26T13:44:00.000-07:00

Heat pumps are energy efficient devices used for both heating and cooling a home or small area. They are great in that they use very little electricity and produce minimal emissions in comparison to traditional furnaces and home heating devices. People often wonder about heat pump prices when they are considering having one installed in their home.

The initial investment into a heat pump can be quite costly. The prices are typically higher than the air-source pumps. An average size heat pump will cost approximately twenty-five hundred dollars per ton of capacity. An average house would need a heat pump of approximately three tons. This means that you would expect to pay approximately seventy-five hundred dollars to have a heat pump installed in your home. People are often put off by the initial price but in the long run they can expect to save a great deal of money using this machine.

There are two different types of heat pumps that you can install in your home. There are the ground source heat pumps, which are more energy-efficient than air heat pumps. The ground source heat pumps do not demand extra electrical heaters and they output less carbon dioxide. All heat pumps have been reported to have excellent performance in extreme temperatures and even work wonderfully during extreme cold temperatures.

The installation process of a heat pump can take about two to three days. You can expect to add this to the price of the unit because you have to pay for the labour that it takes to install the machine. When looking to have your heat pump installed you should look for a company that has extensive experience in this area so that they do not have to take extra time to figure out what they are doing. This will keep the total price of your unit that much lower.

For more information on heating and air conditioning and other related topics, visit Homeclimate at http://www.homeclimate.biz

Pump Information and Detail

2008-09-07T05:17:00.000-07:00

This is a good article which provide good explanation on pump used in the processing industry.

Pumping of liquids is universal in chemical and petrochemical processes. The many different materials being processed require close attention to selection of materials of construction for various pump parts, shaft sealing, and the hydraulics of the individual problems. A wide variety of pump types have been developed to satisfy special conditions found in chemical plant systems; however, since all of these cannot be discussed here, the omission of some does not mean that they may not be suitable for a service. In general, the final pump selection and performance details are recommended by the manufacturers to meet the conditions specified by the process design engineer. It is important that the designer of the process system be completely familiar with the action of each pump offered for a service in order that such items as control instruments and valves may be properly evaluated in the full knowledge of the system.

A pump is a physical contrivance that is used to deliver fluids from one location to another through conduits. Over the years, numerous pump designs have evolved to meet differing requirements.

Axial-flow pumps are used for services requiring very high capacities at low heads.

To properly accomplish a good and thorough ratinghizing of a centrifugal pump, the plant system designer should at a minimum do the following.

Get other all about pump types, selection, problem in pumps, pump design etc. in :

pump | deep well pump | jet pump

The author name is Bustanul Arifin. A chemical engineer who graduate from reputable university in the world. Now I am working as consultant in ethanol plant design, and petrochemical construction contractor. This article was written based on my experience and many text books. Please feel free to visit my website :

pump | deep well pump | jet pump

Textbook reference :

What is the Heat Pump Efficiency of Your Heat Pump?

2008-09-07T05:03:00.000-07:00

Are you looking into purchasing a heat pump to either heat or cool your home? If so, what is the main function this unit will be used for? Heat pump efficiency ratings are different for each season. The ratings do not always correlate, so if your pump has a high SEER rating, it does not mean that it will have a high HSPF rating.

Therefore, it is important to prioritize your exact needs for this device. If you live in a warm region that will require more use of the cooling unit then the heat pump efficiency should be higher for the SEER rating. If you live in a cooler region, that will require more heating then look for a unit with a higher HSPF rating.

Every heating and cooling unit must have an energy efficiency rating. It lets people know how that particular model compares to other models and compares the different low and high efficiency ratings.

Now you are probably wondering what these two ratings actual mean. The SEER rating is the Seasonal Energy Efficiency Rating and the HSPF rating is the Heating Seasonal Performance Rating. Each unit is thoroughly tested to determine the exact rating.

Heat pumps are used for both heating and cooling. These devices move heat between the outside and the inside of the home. They do not actually create any hot or cold air.

We can explain this better by stating that during the winter a heat pump will move heat from outdoors into the house. In the summer, they move heat from indoors to the outside. Usually these devices run on electricity, but some run off gas instead.

Heat pump efficiency also factors into the energy savings these units can provide. In some cases, you can save up to fifty percent on your heating costs.

If your heat pump efficiency is high then you could save even more money on your energy costs. A high efficiency heat pump will require less electricity to heat or cool your home, thus they are much more efficient.

However, these units are quite costly. Thus, you have to be sure that this is what you want as far as heating and cooling your home is concerned. Read as many consumer reviews as possible to get a good idea of what units are available on the market and which ones people are satisfied with and which ones are not receiving good reviews.

We provide information for the consumer on heat pump efficiency along with information on different brands including Trane heat pumps as well as many other types of heat pumps.
By M. Applebaum

A Tutorial to Pumps

2008-04-26T07:59:00.001-07:00

-Electromagnetic pumps are made to move liquid sodium and potassium. They are used in the cooling systems of nuclear reactors. These pumps use electrical conductors and magnetic pipes.

-A screw pump is also called a positive displacement pump. It is a widely used pump because it does not form clumps when pumping solids and keeps a constant speed.

These four pump types only represent a portion of the pumps on the market. They are, however, the most popular models.

http://pumpshub.com Everything you need to know about Pumps.

Submersible Pumps

2008-04-26T07:58:00.001-07:00

The four main specifications that should be considered while choosing a submersible pump are maximum expulsion flow, maximum discharge pressure, horsepower, and discharge size.

Pumps provides detailed information on Pumps, Water Pumps, Heat Pumps, Sump Pumps and more. Pumps is affiliated with Sun Powered Heat Pumps.

Water Pump and Windmill Pricing

2008-04-26T04:54:00.000-07:00

When it comes to purchasing a wind turbine, a water pump or windmill accessories, what is it the consumer should look for? The first step, is finding the best manufacturer equipped to answer all your questions about the machines and have the best quality machines to do exactly what the consumer wants to do. That is to save money by using an alternative energy source.

By giving you some idea of windmill pricing, you will have an idea of how you can save in the long term view of owning a wind turbine. What this consists of and how to go about having an alternate source of energy of your own.

Putting an exact price for a water pump or Wind Turbine (windmill) would be impossible to do. A more practical solution is a pricing range. Many things must be factored into the price. How tall the tower will be, is an example.

The average cost of a wind turbine can be any where from $1,500.00 to over $4,000.00. This depends on the consumer, and the manufacturer you are purchasing it from. The tower raising kit averages from $300.00 to $500.00. This is something you have to buy, regardless of the wind turbine. The actual height of the tower is also taken into consideration.

Pricing is basically set on a wind turbine's performance. Simple wind turbine kits have the lower price range. Turbines equipped with higher battery charging, faster blade rotation, and accessories, to name a few details, are in the higher priced bracket. The blades are also a consideration. Although virtually all the turbine models are based on the design of an airplane propeller, the materials used to make the blades are of many different materials. This can also increase the price as well. Sometimes there is also an installation fee.

Water pumps that I have researched range from $300.00 to $1,000.00. These were designed especially for aqua and marine usage. But once again, it depends on the consumer's needs and the company that is selling it.

The main consideration put into the cost of buying the wind turbine (windmill) or the water pump is based on wattage the machine is capable of producing. The more wattage it can produce, the higher in price range it will be. If the wattage output is lower the machine will cost less.

Most Wind turbines (windmills) and water pumps are made to look sleek and not big and bulky. Sleek enhances performance but it also interests the consumer too.

A homeowner would not want a wind turbine or water pump machine that is equipped to be put in a wind turbine field or plant. These turbines, which are larger cost a larger amount of money and will not be effective for the small home. Smaller wind turbines and pumps are specially designed for homes and the cost is lower.

The price of a wind turbine seems to be of little amount, when compared to the savings of the future. Having an alternate energy source affects the economy and the environment, providing the next generation with resources as well.

To find out if windmill power is right for you visit http://residential-windmills.com