EH Oil (Fire Resistant Fluid) Filtration Machine

Fire resistant Fluid maintenance

Concern has occasionally been expressed regarding the rapid darkening of hydraulic oil both mineral and fire-resistant fluids in governing system of a turbine. This is frequently accompanied by a steady increase in the level of acidity, the production of dirt or sludge and the development of a burnt odour.

It is observed that presence of air bubbles in the oil led to them getting compressed and the process generating enough temperature to thermally degrade the lube oil. The dark brown or black colour in the oil, especially if accompanied by the development of deposits, is due to the presence of carbon arising from micro-dieseling, that is, compression of air bubbles arising from inadequate/reduced air release property of the FRF fluid.

Possible reasons for poor air dispersion from oil:

Surface active impurities and additives: One of the most important factors is the presence of impurities or fluid components that are surface active, for example, acids arising from oil oxidation or from the hydrolysis of all ester fluids.

Contaminants: Contaminants can arise from both external and internal sources.

Water: The presence of water can either reduce viscosity (if soluble in the base) or increase it, if it becomes emulsified into the oil or fluid.

In the case of polyol esters, 'strong' acids are produced by both hydrolysis and oxidation, which can catalyse further hydrolysis of the fluid.

Hydrolysis

They can also react with metal components such as brass and copper to form metal soaps that adversely affect oxidation stability as well as the foaming and air release properties of the fluid.

Filtration is a critical step in polyol ester and phosphate ester-based product maintenance. RTES'S mission is to maintain your ester fluid in peak condition for as long as possible.

Since hydrolysis is a continuous chemical reaction process in the ester based products, it is mandatory to install a dedicated contamination control system for EHC units.