Overview
The Maxon 150SMA21-AA11-BB12A0 is a normally open electromechanical vent valve with automatic reset for natural gas service. This valve provides controlled gas venting at specific pressure points, making it essential for safety and operational reliability in combustion and gas control systems. The model combines robust construction with precise flow control for demanding industrial environments.
Key Features
- Normally open operation with automatic reset
- 1-1/2″ (DN40) valve size with NPT threaded connection
- NEMA 4 cast iron body with 400 SS seat, ductile iron disc, PEEK follower ring, and Buna N O-rings
- 115 VAC/60 Hz solenoid and actuator motor with 2.5-second timing
- Two proof-of-open and two proof-of-closure switches
- Field-proven electromechanical design for reliable long-term service
Technical Specifications
The valve offers a Cv of 53 and a maximum operating pressure differential of 70 PSIG, making it suitable for standard natural gas pressure venting applications. The automatic reset feature allows the valve to return to its normally open position after closure, ensuring continuous protection without manual intervention.
Typical Applications
- Industrial combustion burner vent systems
- Natural gas pressure relief and venting
- Safety shutoff and vent valve assemblies
- Commercial HVAC and boiler systems
- Industrial fuel gas control loops
Compatibility & Replacements
Compatible With
- Honeywell/Maxon combustion safety systems
- Standard 115 VAC/60 Hz industrial control circuits
- Natural gas piping systems (1-1/2″ NPT connections)
- Burner management and flame safety modules
- Field-replaceable top assembly systems
Replaces / Drop-In Replacement For
- Maxon 150SMA21 series vent valves with matching electrical and flow configurations
- Verify compatibility with your system integrator or Honeywell technical support before ordering to confirm socket configuration and timing parameters match your application
Works With
- Honeywell Maxon vent valve assemblies and control modules
- 115 VAC industrial control panels and relay circuits
- Natural gas and combustion air control systems
- Burner safety and shutoff valve systems
- Field positioning adapters and mounting assemblies (available separately)
