Mar 20, 2019
How to choose right Positive displacement pumps?
What is Positive Displacement Pump? It is a pump that reciprocates or rotates in a pump body by means of a piston, a plunger, a diaphragm, a gear or a van, etc. to periodically change the volume of a plurality of working chambers in the pump body, and alternately suck and discharge the liquid. How p...
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