Steam turbine is a very complex equipment, among which the turbine oil that plays a lubricating role is very important. Turbine oil ensures the smooth operation of equipment, significantly reduces maintenance costs and avoids turbine failures. The main component of steam turbine oil is high quality mineral oil, which has the characteristics of anti-emulsification (water separation) and air release. The oil level in the tank must be monitored to ensure that there is always enough turbine oil for lubrication.