Progressing cavity pumps: Smooth and safe handling of demanding liquids

What is an eccentric screw pump?

In eccentric screw pump is a volumetric pump that moves liquid through enclosed cavities, created by a rotating screw (rotor) inside an elastic stator. As the rotor spins, the liquid is advanced stepwise from inlet to outlet.

This pumping technology provides a smooth and stable flow without pulsation, which is particularly important in processes where uneven flow can cause problems. It is also gentle on sensitive fluids, such as those that can be easily damaged by too much agitation or pressure. Because the pump does almost no processing of the liquid, it is well suited for shear-sensitive products. 

This pumping technique also works well when the liquid contains some solid particles or has a high dry content. 

Typical applications for progressive cavity pumps

Progressing cavity pumps are used in processes where other pump types cannot deliver the required performance. Here are some examples of applications where they are often used:

Industrial processes

When pumping highly viscous or abrasive media such as slurries, paints, adhesives and polymers, progressive cavity pumps offer controlled flow with minimal pulsation. Their ability to handle solid particles without degrading performance makes them a sustainable choice for demanding industrial environments.

Water and sewerage

Progressing cavity pumps are particularly effective in sewage applications where liquids with high solids contents and varying consistencies need to be conveyed without affecting the stability of the system. They can cope with large variations in medium properties without disturbing the flow profile.

Food and hygiene industry

For sensitive products such as yogurt, dough and jam, progressive cavity pumps enable shear-free transportation that preserves product texture and quality. Hygienically designed models are adapted for CIP and SIP processes and meet strict industry standards for food safety.

Oil and gas industry

In oil and gas applications, progressive cavity pumps are used to transport crude oil, drilling mud and emulsions. Their ability to handle high pressures, varying viscosities and abrasive particles contributes to reliable operation in systems with high demands on mechanical strength and process stability.

Advantages of an eccentric screw pump

This pump technology is appreciated for its ability to meet demanding technical requirements while providing a stable and long-term operation. Some of their key advantages are:

• Smooth flow of liquid: Reduces pulsations and protects sensitive media.
• Handling high viscosities: Effective even with viscous and solid particles.
• Self-suction function: Can draw liquid from levels below the pump.
• Adaptable: Suitable for varying flow and pressure requirements.
• Low maintenance frequency: Robust construction reduces the risk of downtime.

An eccentric screw pump - an investment in safe and sustainable operation

For companies handling demanding fluids, progressive cavity pumps are an investment in both operational reliability and cost efficiency. By choosing the right pump for the right application, you can optimize production, minimize maintenance and create a safer process from start to finish.

Want to know more about our products? Explore our range of progressive cavity pumps here, or contact me for advice tailored to your business.