max. 18 bar
When the oil temperature exceeds the value stamped on the oil thermostat (Standard 70 °C / 158°F), the control process begins, and part of the oil flow passes through the cooler. When the oil temperature reaches a value about 15° higher, the oil valve closes completely (sliding sleeve in the forward position) and all the oil passes through the cooler.
The oil thermostat maintains constant lubricating oil temperature and viscosity.
A further function of the oil thermostat is to prevent condensation in the system by ensuring that the optimal operating temperature is reached rapidly and then maintained.