Definitions Relating to Soft Starters and Motor Surge Protection: P
Index
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Z
- Pelletiser/Pelletizer
- A machine which converts fine particles into solid pellets.
- Planer
- A machine which reduces boards to a specified thickness. Infeed and outfeed rollers draw the board through the machine over a cutter head.
- Press
- A machine which changes the shape and internal structure of metals (usually steel).
- Pump
- A machine which moves fluids.
- Pump, bore
- A submersible pump with a small diameter, suitable for operation down bores.
- Pump, centrifugal
- A pump which contains a rotating impeller inside a stationary cavity. The impeller causes the fluid to rotate, and thereby move from inlet to outlet under its own momentum. As the fluid travels through the impeller passage, its absolute velocity increases. In the volute, diffuser, or ring type cavity the fluid velocity is reduced and its energy converted to pressure energy.
- Pump, positive displacement
- A pump which forces fluid to move by reducing the volume of the pump chamber. Unlike centrifugal pumps, positive displacement pumps are suitable for a very high viscosity of the pumped fluid. Positive displacement pumps include rotary (lobe, screw or gear pump) and reciprocating (piston or diaphragm pump) types. Reciprocating pumps may also be suitable for metering and dosing applications.
- Pump, slurry
- A centrifugal pump suitable for pumping slurry.
- Pump, submersible
- A pump which has a hermetically sealed motor close-coupled to the pump body and which is submerged in the fluid to be pumped.
- Pump, vacuum
- A pump which removes gas from a sealed volume in order to create a partial vacuum. Multiple pumps may be used, in series or in parallel, in a single application.
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