Overview
The Honeywell Maxon 075SMA11-AA11-BB21A0 is a normally closed electromechanical safety shutoff valve engineered for natural gas service. This 3/4″ NPT threaded valve combines automatic reset functionality with fast solenoid-driven closure, making it suitable for furnace control, boiler systems, and industrial gas appliances requiring failsafe shutoff.
Key Features
- Normally closed design with automatic reset for natural gas service
- 115 VAC/60 Hz actuator motor with 6-second timing
- Powerful closing spring provides closure in less than one second
- NEMA 4 cast iron body with 400 stainless steel seat, hardened ductile iron disc, and PEEK follower ring
- One proof-of-open switch and one proof-of-closure switch for control verification
- NPT threaded connection for standard industrial piping
Technical Specifications
- Valve Size: 3/4″ (DN20)
- Connection Type: NPT (threaded)
- Max Operating Pressure Differential: 125 PSIG
- Actuation: 115 VAC, 60 Hz solenoid
- Closure Time: Less than 1 second
- Motor Timing: 6 seconds
- Operation Mode: Normally closed with automatic reset
- Body Material: Cast iron (NEMA 4)
- Seat Material: 400 stainless steel
- Disc Material: Hardened ductile iron
- Service: Natural gas
- Position: Right top assembly
Typical Applications
The 075SMA11-AA11-BB21A0 is ideal for:
- Commercial and industrial furnace safety shutoff systems
- Boiler and water heater gas control
- Dual-fuel appliances requiring gas solenoid control
- Burner management systems in HVAC equipment
- Industrial ovens and process heating applications
Compatibility & Replacements
Compatible With
- Standard 3/4″ NPT piping systems
- 115 VAC, 60 Hz control circuits
- Burner management and flame safety controllers
- Industrial gas appliance control systems
Replaces / Drop-In Replacement For
The Honeywell Maxon 075SMA11-AA11-BB21A0 is part of the 075SMA11 series. Verify compatibility with your system integrator before ordering, as replacement valves may require recertification or control circuit adjustments.
Works With
- Honeywell and third-party burner management systems
- Standard industrial gas control panels
- Proof-of-closure safety interlocks
- 115 VAC solenoid control circuits
