AIR VALVE - #40 1/8" ANGLE HOFFMAN

This 1/8-inch angle steam air vent expels trapped air from a one-pipe steam radiator so steam can fill it, then closes automatically when steam reaches the valve to keep it in the system. The float-type, single non-adjustable port suits ordinary one-pipe radiators that do not need proportional venting.

Key Features:

• Automatic Air Venting -- Opens to release air on a steam call and closes when steam or heat reaches the valve.
• Non-Adjustable Port -- Single fixed orifice sized for radiator venting; no balancing dial.
• 1/8 in. NPT Angle Shank -- Threads into the side tapping of a cast-iron steam radiator.
• Pressure Rating -- Maximum operating pressure 6 psig; maximum pressure 10 psig; non-vacuum.
• Float-Type Body -- Durable float-type mechanism for reliable one-pipe steam service.

Where to Use:

• Building maintenance -- Replacing failed, noisy, or spitting air vents on one-pipe steam radiators and convectors
• Steam system balancing -- Sizing vents by distance from the boiler so radiators heat evenly across the building
• Property heating upkeep -- Seasonal vent replacement in apartment buildings and older steam-heated properties