Electrostatic Oil Conditioners (EOC)

How It Works

Electrostatic oil conditioners (EOC) are dedicated oil cleaning systems designed for installation on hydraulic and lubricating equipment. Through a kidney-loop process, the EOC draws oil from a main reservoir and circulates it a low velocity.

Electrostatic systems do not charge particles or the oil, but instead use a vertically positioned electrode to produce a high potential electrostatic field between itself and a ground surface within the system's pleated cellulose collector element. As oil passes upward through this patented collector and parallel to the electrode and ground surfaces, suspended contaminants as small as sub-micron are forced by the voltage field against the collector media and removed from the oil.

As fluid flows freely through the system, contaminants, submicron particles, dust, dirt are removed and products of oil oxidation, including tars and varnishes are also removed. These contaminants are trapped in the collector for easy disposal.



Electrostatic oil cleaners use the principles of electrostatics (branch of physics that deals with forces exerted by a static or unchanging electric field upon charged objects) to remove particles and varnish contamination, as well as electrophoresis (removal of naturally charged particles by electrostatic force) and dielectrophoresis (removal of a charge-neutral particle by gradient voltage field force).

A particle with a positive charge is drawn toward a negative electrode within the system, while one with an inherent negative charge is drawn toward a grounded plate. A charge-neutral particle that either is already highly polar in nature, or is polarized by the non-uniform voltage field of the collector is drawn toward the area of the greatest field strength (folds of the collector pleats). And, unlike mechanical filters, our EOCs are equally effective at removing soft or hard particles.

To learn more about the science behind electrostatic oil conditioning systems, read "A New Technology for Oil Management: Electrostatic Oil Cleaner", by Dr. Akira Sasaki.

What’s your next step?

  1. Is your Varnish in Suspension or in Solution? We can test it for you and make the recommendations and alleviate your Varnish Issues.
  2. Rent a Varnish Removal Systems (SVRS) to remove sludge/varnish.
  3. Call GIS and we can recommend a solution for your plant.