|Sizes:||1/2'', 3/4'', 1'' 1¼'', 1½'', 2''|
|Temperature ranges:||-15°F (-25°C) to 415°F (252°C)|
Direct Acting valves are designed with a normally open valve seat which closes on increasing temperature. As temperature rises in the bulb, liquid in the bulb vaporizes and transmits power through the tubing to a bellows in the control valve. Heating or cooling fluid passing through the valve is thus modulated to maintain a desired temperature in the process being controlled.
Direct Acting, Double Seat, Indicating