Here’s how a Hydrocyclone Filter works, and why you no longer need a filter element

In a world where filtration must become increasingly smart, sustainable and efficient, one type of filter is rapidly gaining popularity: the hydrocyclone filter. This innovative solution filters solids from liquids without the use of a filter element. No clogs, no replacement costs, just smart physics.

But how exactly does such a system work? And when is a Hydrocyclone Filter the right choice for your application?

What is a Hydrocyclone Filter?

A hydrocyclone filter is a mechanical separation system that uses centrifugal force to remove heavy solid particles (such as sand, silt or gravel) from a liquid stream.

Unlike traditional filters (such as bag filters or strainers), a Hydrocyclone Filter does not use a filter element that can get clogged or require regular replacement. Instead, everything revolves around flow, velocity and gravity.

How does a Hydrocyclone Filter work?

The principle is surprisingly simple and very effective:

1. Tangential inflow
   Liquid enters the filter housing at an angle, creating a circular flow (vortex effect).
   
2. Centrifugal separation
   This rotation pushes the heavier solid particles (such as sand or gravel) to the outside of the flow.
   
3. Segregation & drainage
   The heavy particles are directed to the bottom of the filter, where they accumulate in a collection chamber. They can be discharged periodically or automatically via a flush valve.
   
4. Clean water to the outside
   The liquid, now free of most solid particles, flows out through the central channel.
   

What makes a Hydrocyclone Filter unique?

• No clogged filters
  There are no elements that clog up. Ideal for high dirt loads.
• Low maintenance
  Dirt removal is done manually or automatically. You save on man-hours and parts.
• Constant flow
  Because there is no filter surface clogging, the flow remains steady.
• Sustainable & cost-effective
  Less waste, no replacement parts, and longer life.

Typical Applications of Hydrocyclone Filters

Hydrocyclones are widely used in industries where heavy solids occur in water streams:

Application	Sector
Sand Removal	Water treatment, drinking water, WWTP
Filtering sludge and grit	Petrochemical, offshore, chemical
Protection pumps	Industry, greenhouse construction, process plants
Prefiltration	Food, tank flushing

When is a Hydrocyclone Filter not suitable?

Although powerful, a Hydrocyclone Filter is not a panacea. It is important to note that it is less suitable for removing very fine particles (<20 microns) or lightweight substances such as greases or oils.

Solution: Combine with a bag filter or self-cleaning filter for finer or specific contamination.

Comparison with traditional filters

Feature	Hydrocyclone filter	Bag filter / Strainer
Filter element needed?	No	Yes
Maintenance	Low	High (replacement, cleaning)
Suitable for fine particles?	Limited (>30 microns)	Yes (1-200 microns possible)
Installation costs	Average	Bearing
TCO (Total Cost of Ownership).	Long-term low	Higher with intensive use

Conclusion: when to choose a Hydrocyclone Filter?

Choose a Hydrocyclone Filter if you:

• Deal with coarser contamination such as sand, gravel or silt
  
• Want to handle high flow rates without pressure loss
  
• Want to reduce maintenance frequency and costs
  
• Seeking a durable and robust system without consumable parts
  

For additional fine filtration or industry-specific requirements, a combination with other filters is ideal.

Need advice?

Want to know if a Hydrocyclone Filter is right for your process? Or are you curious about combination filtration for maximum efficiency? Our experienced filter specialists are happy to think along with you.