Description
The Armstrong International B4930 is a TV-2 Series Thermostatic Air Vent designed to automatically purge trapped air from hydronic heating and steam systems. Featuring a 1/2″ NPT connection and a pressure rating of up to 125 PSI, this vent is built for reliable, long-term performance in demanding commercial and residential hydronic applications.
Thermostatic air vents play a critical role in maintaining system efficiency by eliminating air pockets that cause noise, uneven heating, and reduced heat transfer. The Armstrong TV-2 opens automatically when air is present and closes tightly when water or steam reaches the valve seat, preventing water loss and ensuring continuous, efficient system operation.
Key Features
- Thermostatic operation — automatically vents air without manual intervention
- 1/2″ NPT connection for straightforward installation into standard piping
- Rated for pressures up to 125 PSI for versatile system compatibility
- TV-2 Series design engineered for hydronic heating and steam system applications
- Durable construction from Armstrong International, a trusted name in fluid control
- Helps eliminate system noise, air locks, and inefficient heat distribution
Specifications
- Brand: Armstrong International
- SKU / Part Number: B4930
- Model Series: TV-2
- Connection Size: 1/2″ NPT
- Maximum Pressure Rating: 125 PSI
- Vent Type: Thermostatic Air Vent
Application
The Armstrong International B4930 TV-2 Thermostatic Air Vent is ideal for use in hydronic heating systems, hot water distribution systems, and steam piping where automatic air elimination is required. Proper air venting protects pumps, boilers, and heat exchangers from damage caused by air entrainment, making this vent an essential component in any well-maintained hydronic system.
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