Hoffman Air Valve 401488 79, 1/2" x 3/4" Straight Water Main Vent Valve

Water Main Vent Valve
For use on hot or cold or glycol water mains andprocess applications with specific gravity greater than 0.7
Tapped at top for 1„8" NPT safety drain connectionfor discharging moisture
Removable top
Built-in Check Valve
1„2" NPT female and 3„4" NPT male straight shank
Maximum operating pressure 75 psig (5.2 bar)(Drop away pressure - maximum pressure against which the vent can open).
Maximum hydrostatic pressure 200 psig (13.8 bar)
Maximum temperature 250°F (121°C)