Progressing cavity screw pumps VULCAN Series

Varisco progressing cavity screw pumps designed to handle liquids of any viscosity, including those that contain abrasives, solids, or fibers. These pumps are ideal for a wide range of challenging applications where traditional pumps might struggle, especially in industrial plants dealing with complex fluids.

Varisco progressing cavity screw pumps

Technical data

FLOW

Up to 400 m3/h

Viscosity

Up to 1.000.000 [cPs]

Pression

Up to 48 bar

Temperature

Up to 180°C

VULCAN SERIES

Operating principle of progressive cavity screw pumps

The progressive cavity pump belongs to the group of rotary positive displacement pumps. These pumps are characterized by the presence of a “rotor” (rotating part) and a “stator” (fixed part).

Inside the stator (comparable to a screw with two principles) the rotor moves (comparable to a screw with one principle), pushing the fluid through the mobile cavities that are created with the reciprocal movement. The product is then pumped without lamination, centrifugation or shock of any type. 

The number of stages of the rotor-stator unit determines the pressure that can be obtained: the range includes pumps up to 8 stages with pressures up to 48 bar. The diameter of the rotor determines instead the capacity of the pump that can operate between 0.1 and 400 m3/h depending on the models.

Varisco progressive cavity screw pump

Advantages

  1. Constant capacity, directly proportional to the rotation speed and quite independent of the pressure.
  2. Smooth flow, without pulsations or pressure peaks which could cause vibrations in the pipework.
  3. Reversibility. By inverting the direction of rotation the flow of liquid is reversed. Full performance is available in either direction of flow. Reversible flow up to 3 bar as standard, up to 12 bar with hydraulic balance on request.
  4. Self-priming. The high vacuum created by the pump permits rapid self-priming at the maximum height made possible by the physical characteristics of the pumped liquid (temperature, vapour pressure, viscosity, etc.). Large cross section between stator and casing, with smooth design, to improve the priming of the product.
  5. Rubber sleeves designed with special geometry to increase the durability. Reliable operation even in presence of sharp solids in the medium.
  6. Pump coupled to the motor with high resistance pin in order to ensure the complete reversibility.
  7. Transmission shaft with universal pin joint, bushing guide and transmission guide to enable long endurance and reliability. Bushings made to minimize the wear of the pin, avoiding the replacement of the transmission shaft and minimizing the costs of repair and maintenance downtime.
  8. Easy and cheap maintenance. Few components subject to wear and with compact size.
Viscous fluids

Applications

To ensure correct pump operation, it is crucial to pick the right product with respect to the application and the chemical-physical characteristics of the fluid being treated.

Sewage pumps
Sewage plants

dirty waste water, sludge.


Pump for wine industry
Food & Beverage

grapes, grape paste, wine, fruit juice pulp, liquors, beer, fruit paste, tomatoes, pulp fruit, vegetable, milk products,  flour, dough, chocolate, creams


Pump for adhesives
Paper Industry

cellulose, glue, pulps, patinas, starch.


Pump for paints and inks
Paints and inks

solvent, ink paste, pigment, paint.


Pumps for petroleum products
Cosmetic Industry

soap, cream, tooth-paste, shampoo, detergent.


Pump for glucose
Chemicals

resins, reagents, acids, biodiesel.


Pumps for resins
Resins

Resins are synthetic materials used in a wide range of applications, from the production of construction materials to paints, from adhesives and packaging products to rubbers.


Pumps for marine
Marine

oil sludge, bilge water, sea water.


News and Success Stories

Varisco provides news and success stories on pumping systems, enforcements from our customers and tips for the maintenance and use of internal gear pumps, open impeller pumps and more.

2024-08-31

Success story

Varisco pumps for paper industry

Cartiera del Borgo in collaboration with Varisco, has optimized its separation systems by installing self-priming centrifugal Varisco J pumps at the Fabbriche di Vergemoli production paper plant.
paper industry

2024-05-31

Success story

Varisco pumps for powder detergent production

Varisco pumps can be used within the detergent powder production cycle to handle very abrasive slurry with high viscosity and for washing tanks and production lines, respectively.
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2023-11-30

Success story

Varisco pumps in PET recycling plants

Varisco pumps can be used within the PET (polyethylene terephthalate) recycling cycle for handling the washing fluids of plastic waste to be recycled and others.
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