Screw pumps are designed to transport viscous, sensitive or aggressive liquids with high precision and minimal pulsation. They excel at handling delicate products without damaging them, making them an obvious choice in industries with high demands on product quality and hygiene. With their ability to ensure smooth and continuous flow, screw pumps are a key component in many industrial processes where reliable dosing and reliability are essential.

What is a worm pump and how does it work?

Screw pumps belong to the category of positive displacement pumps. Their operation is based on a simple but effective principle: a helical rotor - often referred to as a worm - rotates inside an elastic stator tube. As the rotor turns, closed cavities form between the rotor and stator. These cavities move forwards along the length of the pump, transporting the medium from inlet to outlet.

The special feature of this type of pump is that the fluid moves with very low pulsation. This means that the pump does not create violent pressure surges or turbulence, and that the product is not subject to compression or shearing force. This makes the worm pump particularly suitable for products that require gentle handling, such as liquids with solid particles, shear-sensitive media or viscous materials.

Screw pumps can run in both directions and the flow rate can be easily regulated - either via motor speed or control system. This makes them ideal for precise dosing and for processes that require consistent flow and repeatability.

How to use worm pumps in industry

Screw pumps are widely used in a wide range of industries - from food production and pharma to chemicals and cosmetics. Common to these applications is the need for accurate and gentle fluid handling.

I food industry Worm pumps are used for syrups, dough, jams and sauces - products that are easily damaged by traditional pumps. The screw pump maintains the consistency and structure of the product while ensuring a stable and hygienic process.

I pharma and cosmetics Screw pumps are used for creams, ointments, shampoos and gel products, for example. Here it is important that the pump can handle sterile or sensitive media without risk of contamination. The low pulsation and precise dosing make the worm pump ideal for filling, dosing and transferring.

I The chemical industry Screw pumps are suitable for aggressive or viscous media such as resins, glues, dyes and slurries. Here, reliability, chemical resistance and precise control are essential for process quality and safety.

Choose worm pumps from Alflow

At Alflow, we offer a comprehensive range of screw pumps designed to fulfil the high demands of modern process industries. Our solutions range from compact standard models to customised systems that integrate directly into existing plants.

We deliver worm pumps with a focus on:

• Gentle handling of the media
• Precise and repeatable dosing
• Minimal pulsation and consistent flow
• Hygienic design with focus on cleaning and maintenance
• Proven quality for the food, pharma and chemical industries

Alflow's team of technical specialists are ready to help you select, size and integrate worm pumps into your application. We advise on material selection, flow requirements, pressure conditions and regulatory requirements - and ensure that you get a solution that works optimally both in operation and on the bottom line.

FAQ

What is a positive displacement pump?
A positive displacement pump moves fluid by capturing a fixed volume and moving it mechanically. It creates a constant flow and is particularly effective for viscous or sensitive liquids where precise dosing is needed.

How does a hand pump work?
A hand pump works by manual operation. When a handle is moved up and down, negative pressure is created, which sucks liquid up through a valve. This type of pump is typically used for smaller volumes of liquid or in emergency situations.