RRR
Oil Purification

Contaminants produced in the Hydraulic Circuit. Hydraulic circuits are a closed-circuit system of tanks, pumps, flow control valves, pressure gauges, actuators, etc. The sliding actions within these systems produce friction which eventually cause small bits of metal to wear off and enter the system causing abrasion. Eventually, the abraded surfaces allowed oil to leak, causing pressure loss and malfunction.

Contamination from oil fin cracks. Oil fin coolers often experienced cracks which can allow water to permeate hydraulic fluid, causing the fluid to emulsify. These emulsified fluids are often responsible for rust and cavitation within a system.

Contaminants from the decomposition of hydraulic fluid. The basic composition of hydraulic fluid is a hydrocarbon compound combined with small amounts of oxygen. When this fluid comes in contact with high temperatures or continuous light, oxygen absorption is increased and oxidation is accelerated causing a sludge deposition. At low temperatures, this deposition is often in the form of a gel-like sludge that can stick to control valves and caused oil blockages. At higher temperatures, the sludge usually disolves into oil contaminants.

Contamination from addatives. Field studies have shown that some addatives (added as anti-wear, antioxidant or abrasion preventatives), hydrolyze and deteriorate at high temperatures, and can actually shorten the longevity of the fluid.