401416 HOFFMAN #4 STEAM THERMOSTATIC AIR VENT 3/4M - 1/2F
- 1/2" x 3/4"
- Max Pressure 25 psig
- Body Material Steel
- Temp Range 140 to 240 F
- Thread Size 1/2" and 3/4"
- Max Operating Temp 25 psig
- Non-Adjustable
- Used on steam systems and process equipment
- Model # 4
- Operates on temperature change only; does not close against water
Must be installed 6-10" (150-250mm) above horizontal return and 18" (450mm) above the boiler water line