The Armstrong 21-AR Cast Iron Air Vent is engineered for reliable performance in industrial steam and HVAC systems. Built with a ASTM A48 Class 30 Cast Iron body, this air vent delivers efficient operation and long service life.
Key Features
- Automatic air venting — no manual operation required
- Thermostatic element prevents steam loss
- Improves heat transfer efficiency
- ASTM A48 Class 30 Cast Iron body construction
Applications
Designed for commercial and industrial steam systems where reliable air removal is essential.
