This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726. Thermostatic valves monitor fluid temperature and automatically modulate open and closed based on the valve’s set-point. This proportional control provides a stable temperature and reduces pumping costs. Solenoid valves operate with an on-off temperature switch to fully open or close the valves. On-off flow control results in oscillations and temperature swings which may be reduced by a lower temperature differential, however this increases the number of switching points and decreases longevity of control elements through their excessive use. Automatic Transmission Parts, Automatic Repair Kit, Automatic Master Kit – Transpeed,