Tag: Screw pump

A distinction is made according to the movement type of the displacer. The types are rotary and reciprocating positive displacement pumps.Oscillating positive displacement pumps include

• Piston pump
• Diaphragm pump

The following constructions are counted among the rotating positive displacement pumps:

• Screw pump
• Progressing cavity pumps (eccentric screw pumps)
• Rotary lobe pump
• Gear pump
• Screw pump
• Peristaltic pump

In opposition to the centrifugal pumps the positive displacement pumps are suitable for a very high viscosity of the pumped fluid. Furthermore the reciprocating pumps can be suitable for metering and dosing applications.