Servo system HFB 68 is a water-in-oil type of fire resistant hydraulic fluid.It is used in hydraulic systems in mining equipments which works under extreme operating conditions. It provides lubrication and fire resistance to hydraulic equipments. It meets IS:10532 (part 2) – 1983 (Reaffirmed 2004), former National Coal Board, UK Specification No.570/1970. It is accepted by Director General of Mines Safety, Dhanbad.
| Kinematic Viscosity cSt @ 40°C | 62-74 |
| Auto Ignition Temp,°C (type) | – |