Servosystem HFB 68 is invert emulsion (water-in-oil) type fire resistant hydraulic fluid specially developed for use in hydraulic systems in mining equipments working under severe operating conditions. It imparts fire resistance as well as proper lubrication to hydraulic equipments. It meets IS:10532 (part 2) – 1983 (Reaffirmed 2004), former National Coal Board, UK Specification No.570/1970. It is approved by Director General of Mines Safety, Dhanbad.