They are used especially in the transport of plastic masses and dispersions.
Like the eccentric screw pumps, they are suitable for the highest viscosities.
In the positive displacement pump the movement of the fluid is forced by reducing the volume of the pump chamber.
Read more Plunger pumps have a displacement body (plunger) which performs an axial movement in the pump working chamber.
Read more Diaphragm pumps are usually regarded as a special type of reciprocating piston pumps.
Read more Rotary lobe pumps belong to the group of rotary positive displacement pumps.
Read more Reciprocating piston pumps (also oscillating pumps) are a group within the positive displacement pumps where the volume of the pump chamber is periodically changed by an axial movement of the inner part (piston).
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