RMF varnish removal system

The RMF varnish removal system is the most complete varnish removal and prevention system on the market. It removes oxidation by-products and prevents varnish formation during the cooldown.

The filter unit acts as a kidney loop, continuously circulating fluid through the filter media. In addition an RMF Oil Quality Sensor can be used to monitor oil degradation.

The RMF varnish removal system can be configurated for applications with fluid volumes up to 36000 liters.

The Long Fiber Cellulose / Polypropylene cartridges are specially designed for the removal of varnish by-products which are dissolved in the fluid. These cartridges adsorb polar acids by means of special compacted fibers which create an intricate internal flow path.

Unlike other technologies, the RMF varnish removal system does not add water to the fluid. The cartridges actually remove water and other solid contaminants.


  • Removes soluble and insoluble varnish contaminants
  • Prolongs oil health by reducing additive consumption
  • Reduces and prevents servo valve sticking
  • Efficiently cleans without adding water or other by-products to the system


Varnish is a common problem for a wide range of hydraulic fluids and lubricants, especially in turbine and plastic injection molding applications. It results in valve sticking, shorter fluid life, shorter filter life and unscheduled downtime.

The formation of varnish begins with oxidation of the fluid. Wear particles and moisture generate oxidation. Those factors will react with hydraulic fluid resulting in degradation and rising Total Acid Number (TAN).

RMF varnish removal systems are available in multiple versions. Check documentation for ordering code or contact us.


Documentation (460.54 KB)