Progressing Cavity Pumps

This is a type of positive displacement pump and the working principle is based on Archimedes Screw.

Working Principle

The actual pumping elements of the pump are rotor and stator. The single helical rotor rolls eccentrically in a double threaded helix stator of twice the pitch length. A series of sealed cavities 180° apart are created that appear to progress from suction to discharge during one rotation of rotor.

The opposing cavities fill and empty simultaneously resulting in a pulsation less flow. The fluid travels axially with relatively low velocity and minimal agitation. The stator is made of a resilient elastomeric material and bonded to the stator tube. The important feature of the pumping principle is the ability to handle slurries and solid particles. The elastomer stator also permits passage of solid particles due to elastomeric deformation. The compression fit of the rotor and stator enables the Tushaco progressing cavity pumps to handle gaseous and low viscosity liquids. The pressure capabilities of the pump are a function of the number of cavities. Tushaco progressing cavity pumps are available in a wide variety of materials - cast iron or stainless steel wetted parts and 10 standard elastomer materials. Tushaco versatile progressing cavity pumps are rugged, compact and highly efficient.

Fluids, which are delicate, shear sensitive or abrasive, low or high viscosity, with fibers, with high air content or large solids, can be conveniently handled by Tushaco progressing cavity pumps. View Catalogue


Typical Pumped Media

Effluent with & without solids, Milk of Lime, General Sewage Slurry, Media, Protective Chemicals, Acids, Adhesives, Caustic Soda, Cellulose, Cement Slurry, Dye Liquor, Dye Baths, Flouring, Plaster, Grout, Ink, Mortar, Coal Slurry, Lime Slurry, Colors, Cosmetics, Detergents, Glue, Lacquers, Hair Oil, Hand Washing Cream, Paints, Shampoos, Waxes, Alcoholic Beverages, Apple Puree, Baby Food, Beer, Beet Sludge, Biscuit Dough, Citrus Fruit Masher, Cream Cheese, Edible Oil, Eggs, Raw Fats, Fish Residues, Fruit & Berry Masher, Honey, Ice Cream, Lard, Meat Extract, Milk, Mustard, Tomato Paste, Vegetable Oil, Wine, Yeast.

Typical Applications

Loading & Unloading, Transfer, Polymer Feed, Dewatering, Sludge Transfer, Chemical Feed, Centrifuge Charging, Filter - Press Charging, Kiln Charging& Drainage, Metering, Pit Emptying, Metering.

Typical Industries

Water treatment plants, Oil & Gas, Chemical, Food Process & Production, Petrochemical Process, Sewage Treatment Plants.

Maximum performance data

  • Capacity : upto 2700 lpm
  • Diff. Pressure : upto 24 bar

Maximum Operating parameters

  • Viscosity : 1 to 100000 cSt
  • Fluid Temperature : upto 120 °C

Material of Construction

  • Casing Options : Cast Iron / Stainless Steel / Fabricated Steel / Fabricated Stainless Steel
  • Rotor Options : Stainless Steel / Tool Steel
  • Stator Options : Nitrile / EPDM / Viton / Hypalon / Neoprene
  • Sealing Options : Gland packing / Mechanical seal

Construction Features

  • Stages : one / two
  • Stator Construction : Standard / Equal Walled
  • Mounting Options : Horizontal foot / Vertical tank / Gear Box


Relief valves, base frame, coupling, coupling guard, companion flanges, pressure gauges, electric motor, variable speed drives, stator protection devices (against dry running) etc.
Pump mounted on a base plate with above accessories as a ready to install system can be supplied.

Salient Features

  • Sturdy drive design provides strength for rigorous continuous operation
  • Unique pivot-joint design extends service life and reduces replacement cost
  • Close-Coupled models with built-on speed reducers offer compact pumping unit
  • Stators are available in a wide range of elastomers
  • Special ES version with rugged torque transmitting ability