What is a water pump?
Any pump that uses various mechanical and hydraulic principles to move water through a piping system and to build adequate pressure for its intended use. They have been around in one form or another since early civilizations. Today water pumps are used in a broad range of residential, agricultural, municipal, and industrial applications.
How do they work?
The pump relies upon principles of positive displacement and kinetic energy to move and pressurize water. Most require A.C. or D.C. electrical power to energize the pump motor, while others can be powered by other types of drivers, such as diesel or gasoline engines. A few of the most common types of water pumps include:
- Positive displacement pumps rely on rotary or reciprocating motion to create a vacuum to draw water into the intake, and subsequently apply direct force on the water to push it through the discharge, and build up additional pressure as required. The original pumps that were used in ancient Greek water systems used rotary positive displacement screws to accomplish this. Early hand pumps still used throughout the world rely on positive displacement reciprocating motion created by moving the pump handle up and down to achieve the pumping action. Reciprocating positive displacement versions typically have one or more sets of check valves at the inlet and outlet of the pumping chamber to keep the fluid moving in one direction toward the outlet of the pump.
- Centrifugal pumps are a type of velocity pump that use a rotating impeller to create high velocity (kinetic energy). The water then passes through the pump volute casing where the high velocity is reduced as this velocity energy is converted to high pressure.
How are they used?
Water pumps are used in private residences, city water systems, agricultural irrigation, and industrial applications. They range from small pond pumps, to multistage pumps used in wells, to the huge pumps used in municipal and industrial applications.
Here are a few water pump manufacturers to consider.
Patterson’s H2O Works™ Municipal Pumps & Systems meet the needs of clean water applications. The company’s product line includes vertical in-line, vertical turbine, horizontal split case, two-stage DMD, end suction, and axial and mixed flow models. These high performing pumps and systems provide potable water to cities and homes from reservoirs, rivers and wells. They meet the irrigation demands of large-scale agricultural sites.
Understanding a few key factors before buying a vertical turbine pump can prevent unnecessary maintenance costs. Author provides some advice when shopping for and installing the pumps motor, discharge head, bowl assembly, and column & lineshaft.
Centrifugal pumps can sometimes be noisy, perform poorly, break shafts, and cause other problems. This is often due to one of many pump suction conditions.
Incorrectly installed suction and discharge piping can create stresses on the pump casing and thus reducing the reliability of the seal and bearings. Read tips on how to eliminate this occurance.
QuantumFlo recently earned the prestigious NSF 61/ANSI Standard 61 and Low Lead Compliance certification from the International Association of Plumbing and Mechanical Officials. The certification reflects the pump system manufacturer's ability to control the quality of its portable water system components.
SPX Corporation has completed its acquisition of CLYDEUNION Pumps, a global pump supplier and maker of technologies used in oil and gas processing, power generation and other industrial applications.
Thompson Pump’s compact pump series provides the advantages of the Thompson Pump JSC series with the benefits of a smaller size.
Bell & Gossett sets the Fall 2011 course training schedule for its Little Red Schoolhouse Education Center in Morton Grove, Illinois. The seminars deliver various pump and system topics to engineers, contractors and facility maintenance professionals. Visit http://completewatersystems.com/brands/bell-gossett/ for more details.
KSB introduces immersion variant of high-pressure pump. The new pump, called Movitec VCl, is a vertical, multistage centrifugal pump that can be used for handling coolants, condensate and lubricants for machine tools. The pump has a max flow rate of 27 m3/hr and the maximum discharge head is 250 m.
Chilean pump manufacturer Neptuno Pumps has been awarded a contract to supply a dozen vertical turbine pumps for a reclaim water system project at a copper mine in Chile.