Positive Displacement Pump

What is Positive Displacement Pump?

Positive Displacement Pump meaning in Safety terms is

  • A pump which moves a specified quantity of water through the pump chamber with each stroke or cycle; it is capable of pumping air, and therefore is self-priming, but must have pressure relief provisions if plumbing or hoses have shut-off nozzles or valves . Gear pumps and piston pumps are common examples of this type. 


reference: Glossary A – Z | National Wildfire Coordinating Group