Progressive cavity pumps get make-over
A
Netzsch Pumps product story
Edited by the Engineeringtalk editorial team
Mar 21, 2006
Five progressive cavity pumps are suitable for use with low to highly viscous fluids, even with solids inclusion, providing capacities up to 85m3/h at pressures up to 6bar.
Progressive cavity pumps, an industry staple for several years, have been subject to a design and performance make-over by Netzsch Pumps.
The firm's Nemo M Champ pumps use nine major components, a reduction of over 70% compared with conventional pumps of this type.
Features include a built-in reserve stator and maintenance-free drive chain, helping to set standards for long-life and reliability.
Five pumps are available, suitable for use with low to highly viscous fluids, even with solids inclusion, providing capacities up to 85m3/h at pressures up to 6bar.
With their ability to handle treated and untreated sludge, grease and oil emulsions, industrial effluent and even processed food products, the pumps are versatile.
As well as environmental and waste-water treatment applications, their liquids handling capabilities make them suitable for chemical, general engineering, processing, mining and quarrying uses, with other applications including vegetable washing plants.
The progressing cavity pump has a capacity proportional to rotational speed with reversible flow direction.
High suction and pressure capacities are combined with continuous low pulsation conveyance, independent of media pressure or viscosity.
Maintenance and wear-free operation, with low life-cycle costs and ease of service, also form part of the specification.
A robust and space-saving bevel geared drive is used to power the chromium plated rotor connected via a corrosion resistant flexible-rod drive chain.
This rotating mechanism is devoid of rotary joints or wear parts and does not require lubrication.
It can also be easily removed if required.
The compact pump housing helps prevent solids sedimentation and has diametrically opposed horizontal flanged ports for pipeline connection.
One port is fitted with a blanking plate, and used for inspection or cleaning access.
A wide range of electric motor speed, power and supply voltage variations can be specified to suit requirements.
The stator section of the pump has a bonded elastomer lining of Nemolast which provides the progressing cavity movement of the conveyed media under the action of the rotor.
These stators are also reversible, using a quick clamping system, to provide an integrated reserve stator for extended operational life.
Optional elastomer linings are available to suit chemical or other aggressive media.
Integrated gaskets and flow tapers at both ends ensure low NPSH values in both pumping directions.
The stator clamping device carries an information plate for pump maintenance and operational safety.
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