Description
The Armstrong International D500631 is a Series 21AR Cast Iron Fixed Pivot Ball Float Air and Gas Vent designed for reliable automatic venting of air and non-condensable gases from steam and hot water systems. Built with a rugged cast iron body, this vent delivers long-lasting performance in demanding commercial and industrial hydronic and steam applications.
Key Features
- Fixed pivot ball float mechanism ensures consistent, automatic air and gas venting
- Cast iron construction for durability in high-pressure steam and hydronic systems
- 5/64″ precision orifice for controlled venting performance
- In-line installation with matching 3/4″ NPT inlet and outlet connections
- Rated to 133 PSI maximum working pressure
- Series 21AR design engineered for dependable long-term service
Specifications
- SKU: D500631
- Brand: Armstrong International
- Series: 21AR
- Body Material: Cast Iron
- Connection Size: 3/4″ NPT Inlet x 3/4″ NPT Outlet
- Maximum Working Pressure: 133 PSI
- Orifice Size: 5/64″
- Vent Type: Fixed Pivot Ball Float Air and Gas Vent
Applications
- Steam distribution and condensate return systems
- Hot water and hydronic heating systems
- Commercial and industrial HVAC piping systems
- Automatic venting of air and non-condensable gases from system high points
