types of screw pumps

Screw pumps are positive displacement pumps that use one or more screws to move fluids. They are known for their ability to handle a wide range of viscosities and provide a smooth, continuous flow. Here are the main types of screw pumps:

1. Single Screw Pumps

• • Description:

• • Utilizes a single helical rotor that rotates within a cylindrical casing.

• • Applications:

• • Ideal for transferring viscous fluids, such as sauces and oils, in food and beverage industries, as well as for pharmaceuticals and chemicals.

• • Advantages:

• • Self-priming, gentle handling of fluids, low shear forces.

2. Twin Screw Pumps

• • Description:

• • Features two intermeshing screws that rotate in the same direction within a casing.

• • Applications:

• • Commonly used in the oil and gas industry, chemical processing, and for pumping viscous liquids.

• • Advantages:

• • Higher flow rates compared to single screw pumps, low pulsation, and efficient handling of a variety of fluids.

3. Triple Screw Pumps

• • Description:

• • Consists of three screws, where one is the driving screw and the other two are driven by the first.

• • Applications:

• • Often used for pumping lubricating oils, fuels, and other low-viscosity fluids in automotive and industrial applications.

• • Advantages:

• • High efficiency, smooth flow, and the ability to handle varying viscosities.

4. Progressive Cavity Pumps

• • Description:

• • A type of single screw pump that uses a helical rotor within a stator to create progressive cavities that transport fluids.

• • Applications:

• • Widely used in wastewater treatment, food processing, and chemical manufacturing.

• • Advantages:

• • Handles a wide range of viscosities, self-priming, and gentle on sensitive materials.

5. Submersible Screw Pumps

• • Description:

• • A type of screw pump designed to operate submerged in the fluid being pumped, often used in deep wells or sumps.

• • Applications:

• • Commonly used for groundwater extraction, sewage, and wastewater pumping.

• • Advantages:

• • Compact design and efficient operation in submerged applications.

6. Horizontal and Vertical Screw Pumps

• • Horizontal Screw Pumps:

• • Designed to be installed horizontally, suitable for various applications with sufficient space.

• • Vertical Screw Pumps:

• • Installed vertically, ideal for applications with limited space or where head height is a concern.