High capacity twin screw pumps provide smooth, pulse-less flows
12 April 2015
Michael Smith Engineers has introduced a self-priming pump which can provide smooth, pulse-less flows up to 1,700m3/hour and at pressures up to 55bar.
The 3P Pera Prinz twin screw high capacity pumps are available with either one, or two pairs of screws and in a choice of wetted materials. These are driven by external gearing so the screws never come into contact with each other. This ensures 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), very low NPSH values and less component wear.
3P Prinz pumps are a suitable alternative to centrifugalpumps for pumping fluids with low, medium and very high viscosities up to 35,000 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 thanks to the screws' low inertia and this facilitates a wide range of flow rates if the pumps are driven by a variable speed drive or inverter. They 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.
These pumps can be supplied to API 676 specification for the petrochemical, oil and gas industries.
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