Our ranges of rotary positive displacement pumps include:
- Gear pumps
- Lobe pumps
- Vane pumps
- Peripheral pumps
- Screw pumps
- Hollow rotary disc pumps
In gear pumps the liquid is trapped by the opening between the gear teeth of two gears and the casing of the pump on the suction side. On the pressure side the fluid is squeezed out when the teeth of the two gears are rotated against each other. The motor provides the drive for one gear.
The lobe pumps operates similar to the gear pump, but with two lobes driven by external timing gears. The lobes do not make contact.
Some designs of positive displacement pumps combine the design elements of reciprocating pumps with the design elements of rotary positive displacement pumps. The resulting rotating reciprocating pump has no mechanical valves, like a rotary positive displacement pump, but has accurate output and typical service intervals more commonly associated with a reciprocating positive displacement pump.
|Pumps||Flow Range||Maximum Pressure|
|HNPM Internal Gear Pumps||1152 ml/min||150 bar||More Info|
|Micropump External Gear Pumps||40 l/min||8.7 bar||More Info|
|Liquiflo External Gear Pumps||200 l/min||24 bar||More Info|
|Viking Gear Pumps||345 m3/hr||172 bar||More Info|
|Viking Lobe Pumps||184 m3/hr||27 bar||More Info|
|Viking Rotary Vane Pumps||36 m3/hr||14 bar||More Info|
Rotary pumps from the UK's leading pump specialist, Michael Smith Engineers.