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All-Pumps Screw Pump

SCREW PUMP FEATURES AND BENEFITS

  • Ability to handle a wide range of liquids, viscosities, flow rates, and pressures
  • High operating efficiencies leading to low operational costs.
  • Smooth running components and quiet operation.
  • Ensures constant fluid flow even with varying system backpressures.
  • Less wear and tear accounts to low mechanical vibration
  • High tolerance to entrained air and gases.
  • Low pulsation, which means low stress on the fluid transfer components.
  • Fast to install and easy to maintain.
  • High tolerance to contamination compared to other rotary pumps.
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Description

POSITIVE DISPLACEMENT

Best For Wide Range Of Liquids, Flows, Pressures & Viscosities

Rotary Pump

Screw pumps belong to the rotary positive displacement group of industrial pumps. They are equipped with one or more screws that rotate inside a cylindrical cavity. The fluid moves linearly with the immersing screws until it reaches the discharge side of the pump. The clearance between the screw and the cavity inside the casing is very tight, hence allowing the fluid to gain pressure as it travels through the pump.

The screw pump is available in a variety of different designs to satisfy the requirements of different applications.

 

 

 

COMMON TYPES OF SCREW PUMPS

Screw Pump

More popularly known as Progressive Cavity Pump, PC Pump, or Worm Pump. This type is generally not considered a screw
pump but another sub-class of positive displacement pump because of the rotor’s twisted round shape.

Two Screw Pump

Otherwise known as twin screw pump, this is probably the most used screw pump and is ideal for high power applications
such as heavy oil pipeline transfer. Here, one screw is driven by the power source while the second screw is driven by
the timing gear.

Three Screw Pump

Also called triple screw pump, this type is used in minor industrial applications such as lubrication systems. In this
type, one screw is being driven by the power source, which in turn rotates the other two screws that are positioned
around it.

Four Screw Pump

This classification is essentially a hybrid twin screw type where two screws facing opposite directions are placed on a
single rotor. Like the twin screw pump, timing gears are used to drive the second set of screws.

Five-Screw Pump

This type is similar as the triple screw pump but instead of 3 screws, it has 5 intermeshing screws aligned vertically.
Also, it has a single submersible driver that rotates all screws.

 

OPERATING PRINCIPLES OF SCREW PUMP

Operation

While there are several designs available for screw pumps, all work using the basic principle of two screws counter-rotating each other. Two screws facing opposite directions engage and create a sealed cavity with the pump casing. As fluid enters the pump through the suction side, the drive screws rotate and steadily move the fluid from the inlet to the discharge side. The pump ensures a volumetrically steady flow rate no matter the amount of pressure applied. This kind of operation makes the screw pump a better choice for handling a wide range of liquid types, flow rates, pressures, and viscosities.

 

APPLICATIONS

  • Oil and Gas
  • Manufacturing
  • Mining
  • Hydraulic and Lubrication Techniques
  • Hygienic Processing

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