Automatic Air Vent | 9390N Series | MNPT Brass Body

The 9390N Series Automatic Air Vent is engineered for efficient air release in hydronic heating and cooling systems. Designed with a solid ASTM B283 C37700 brass body and corrosion-resistant internal components, this compact vent ensures long-lasting reliability, even in high-temperature environments.

Ideal for preventing airlock and maintaining optimal flow, the 9390N vents trapped air automatically—eliminating the need for manual bleeding and reducing system maintenance.

✅ Key Features:

• Durable Brass Construction
  Built with a high-performance brass body and vent (ASTM B283 C37700) for corrosion resistance and long life in closed-loop systems.
• Automatic, Maintenance-Free Operation
  Reliably expels trapped air to prevent noise, pressure loss, and damage to pumps or heat exchangers.
• Wide Temperature Compatibility
  Operates from 32°F to 230°F (above 212°F only with anti-boil fluid), making it suitable for both residential and commercial hydronic loops.
• Compact & Lightweight Design
  Short profile (under 3\\”) makes it easy to install in tight spaces; weighs just 0.34 lbs.
• Multiple MNPT Sizes Available
  Offered in ¼\\” NPT, ⅜\\” NPT, and ½\\” NPT to suit your piping system.

? Ideal For:

• Hydronic heating loops
• Radiant floor heating
• Fan coil units
• Boiler piping systems
• Solar thermal systems

Say goodbye to manual venting and system inefficiencies. The 9390N Automatic Air Vent is your plug-and-play solution for smooth, air-free operation in modern hydronic systems.

Dimension, Weight

Material

1 For high temperature