Smooth, pulseless flows

Recently introduced in the UK by Michael Smith Engineers, these pumps are available with either one or two pairs of screws and in a choice of wetted materials.

These positive displacement pumps are driven by external gearing so the screws never come into contact with each other.  This is said to ensure smooth, accurate flows and suitability for pumping shear sensitive fluids. This twin screw ‘non-contact’ design also means high suction lift capability (typically 7 to 8.5m), low NPSH values and less component wear and, therefore, a longer service life.

3P Prinz Twin Screw pumps are very well suited to pumping fluids with low, medium and very high viscosities up to 35000 cSt and at a wide range of pressures.

Components are machined with very accurate tolerances and with very high quality surface finishing which results in reduced clearances and so minimises the potential for leakages and slip.

They are capable of operating at high angular speeds due to the screw's low inertia and this facilitates a wide range of flow rates if the pumps are driven by a variable speed drive or inverter.  They are designed to provide constant flow, regardless of pressure changes, particularly when viscous liquids are being pumped.  Alternatively, they can be used on dosing and metering applications and will be particularly effective where pressure and fluid viscosity are constant during operation.

For toxic or dangerous fluid applications the pumps can be supplied hermetically sealed, complete with magnetic drive which eliminates the potential for any leakage to the environment.

3 P Prinz twin screw pumps can be offered to an API 676 specification for the petrochemical, oil and gas industries.  They are also suitable for pumping applications in the chemical, pharmaceutical and food and beverage industries for transferring a wide range of challenging liquids such as bitumen, tar, lubricating oils, crude oil, grease, paraffin, wax and molasses.