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Progressive Cavity Pumps (also known a eccentric screw pump, helical rotor pump, or mono pump,) are a type of positive displacement pump first invented in the 1930's by French Engineer Rene Moineau.

A helical rotor pump consists of a helical metallic rotor which rotates inside an elastic helical stator. The rotor is precision machined from hardened steel with the stator being an abrasion resistant injection-moulded elastomer that is designed to be compatible with the liquid being pumped.

The geometry and dimensions of these parts are designed so that a double string of sealed chambers (or cavities) are formed when the rotor turns in the stator. The chambers progress axially from the suction to the discharge port of the pump, carrying the fluid. The greater the head or pressure required the longer the pump needs to be to ensure pressue is maintained. Progressive cavity pumps are designed to convey viscous, abrasive, heterogeneous, shear-sensitive and frothing fluids.

A helical rotor pump consists of a helical metallic rotor which rotates inside an elastic helical stator. The rotor is precision machined from hardened steel with the stator being an abrasion resistant injection-moulded elastomer. The geometry and dimensions of these parts are designed so that a double string of sealed chambers (or cavities) are formed when the rotor turns into the stator. The chambers progress axially from the suction to the discharge port of the pump, carrying the fluid.


Helical Rotor Pump

There are many advantages in using a Helical Rotor Pump or Progressive Cavity Pump:

  • High suction lift capabilities: The optimised sealing between the rotor and the stator enables  progressive cavity pumps to possess a particularly high suction lift capability.
  • Self-priming
  • Constant non-pulsating flow
  • Volumetric accuracy: Flow directly proportional to the speed of rotation and independent of pressure. Accurate dosing of difficult products is possible by increasing the number of stages.
  • High efficiency
  • Excellent pressure stability
  • Easy handling of high viscosity and abrasive fluids
  • Ability to transfer multiphase fluids: Mono pumps are able to convey large quantities of air, vapour or gas in a fluid without any running disturbance.
  • Preservation of product integrity
  • Simple design: A single rotating element (a rotor) within an elastomeric stator. Only a single shaft requires sealing.
  • Valve-less operation
  • Reversible flow direction

    Mono EZ Strip Pump with Hopper- Easy Dismantling & Maintenance of pump in-situ -Contact Castle Pumps for more information

    Helical Rotor Pumps / Progressive Cavity Pumps can be used for a wide range of applications such as:

    Abattoir - Minced meat, Blood, Bones, Meat Purees, thick non flowing paste, chicken offal,

    Agriculture & Bio Technology - Fodder, Manure, Corn, Wheat, agricultural slurries, effluents, cattle slurry,

    Beverage - Fruit Juice, pulp, liquors, beer, fruit paste

    Ceramic Industry - porcelain mix, clay, sludge, lime, coating clays,

    Chemical and Petrochemical Industry - resin, reagent, suplhate, caustic soda, acids, crude oil, sludge, biodiesel, shear sensitive latex emulsion, chemicals, condensate, pharmaceutical filter cake, polyelectrolyte, aluminium sulphate, phosphoric acid, alum, caustic solutions, petroloeum spirit, diesel fuel oil, ethylene glycol, titanium dioxide, liquid pvc, Dyes, Flocculants, inks,

    Construction - mortar, coat, cement, concrete

    Cosmetic Industry - soap, cream, tooth-paste, shampoo, detergent

    Fish Industry - Fish waste, interiors, flour, minced fish, vegetable oil, fish oil, blood.

    Food Industry & Dairy - Tomatoes, fruit pulp, vegetables, honey, milk products, milk curds, sauces, starch slurries, potato waste, carbonated drinks, confectionary, chocolate, cod liver oil, vegetable oil, corn oil, fats & oils, fondant, mayonnaise, honey, treacle

    Marine Applications - oil sludge, bilge water, seawater

    Mining Industry - Mining waste water, sludge, lime milk, dewatering, gypsum & silicate, bentonite slurry,

    Oil Industry - Oil, Olive mass, crude oil, sand, hydraulic oil, fractional sands,

    Paint & Coating Industry - colour, solvent, ink paste, pigment, paint

    Paper Industry - Paper paste, cellulose, glue, pulps, patinas, starch

    Pastry & Bakery - flour, dough, sponge cake, caramel, chocolate, creams, honey, jam

    Sewage Treatment - Waste water, primary sludge, secondary sludge, digested, dewatered sludge, flocculants, lime milk, dewaterered sludge cake, blowdown sludges, thickened sludge cake, sludge blending, lime powder dosing, barrier layer injection , raw sewage, septic tank,

    Sugar Industry - product derivatives from beet and sugar cane, glucose, treacle, alcohol, ethanol

    Winery - Grapes, must, grape paste, wine making

     

Brand names of Progressive Cavity Pumps include - Allweiler, Bellin, Bombas Azcue, Bombas Itur, Bornemann, CMO, CSF, Cemo, Holz, Kiesel, Mono, Moineau, Moyno, Nemo, Netzsch, Novarotors, PCM, Ramoy, Seepex & Wagnen

Typical Units:

Small Pumps
  • Dirty water transfer
  • Fuel oil transfer
  • Sump emptying
  • Domestic water supply
  • Irrigation
Industrial Pumps
  • Inherent self priming
  • Wide viscosity range
  • Low shear pumping action
  • Ability to handle abrasive solids & sludges
  • Uniform flow
  • Constant pressure throughout flow
  • Volumetric output proportional to speed
  • Simplicity of design


Nova Rotors Progressive Cavity Pump

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