This 1/8 in. vertical vapor-equalizing steam radiator air vent uses a fixed orifice to purge air from a one-pipe steam radiator so steam can fill it, then closes when steam reaches it. As one of the larger fixed sizes (D), it vents quickly -- suited to radiators farther from the boiler or in colder rooms.
Key Features:
- Automatic Air Venting -- Opens to release air on a steam call and closes when steam reaches the valve.
- Fixed Vapor-Equalizing Orifice -- Non-adjustable D-size orifice; D vents faster than C, for balancing heat across a system.
- For Distant/Cold Radiators -- Larger fixed sizes go on radiators farther from the boiler for even heat.
- 1/8 in. NPT Vertical Connection -- Threads into the radiator vent tapping (vertical).
- One-Pipe Steam -- For low-pressure one-pipe steam radiator 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