# positive displacement pump

> pump that closes a quantity of fluid (gas or liquid) into a fixed volume, and then pushes this volume out through the outlet of the pump

**Wikidata**: [Q1861159](https://www.wikidata.org/wiki/Q1861159)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Displacement_pump)  
**Source**: https://4ort.xyz/entity/positive-displacement-pump