It is therefore desirable to control of the oil flow through the cooler by a thermostatic device, we call an oilstat, set to divert oil to the cooler at 80°C (although a wide range of settings is available for special applications). This is the minimum temperature required to evaporate and dispel contaminating substances.
Can be supplied with push on fittings for 3/8" or 1/2" bore hose only and is designed for smaller engines with relatively low oil flows.
Larger than OT/1, can be supplied with any form of push on or threaded connection, male or female.
The bodies of the these units are die cast aluminium. Control is by a "waxstat", a mass produced item built to highest standards. They are light enough to be supported by the hoses, however a bracket is supplied with the slightly heavier OT/2, if further restraint is required. The oilstats should only be used where oil cooling is adequate, the sensing device will suffer permanent damage above 140°C, replacements are available.