Overview
The ASCO 8043B038 is a gas safety shutoff valve from ASCO’s Red Hat Series, engineered for on-off control of fuel gas in commercial and industrial applications. Manufactured by ASCO (Emerson), this 2-way, normally closed solenoid valve delivers reliable, leak-tight performance in burner and combustion systems.
Key Features
- Double-disc design with overtravel provides redundant sealing for leak-tight shutoff
- Visual position indication and proof of closure (1-amp SPST switch) for safety verification
- Pilot-operated diaphragm design for smooth, dependable on-off control
- Normally closed operation—safe default state in loss-of-power condition
- NPT pipe taps (1/8″ upstream and downstream) with plugs for routine testing and monitoring
Technical Specifications
Key technical details for the ASCO 8043B038:
- Input Voltage: 110/120V AC
- Power Consumption: ~69W
- Port Size: 3/4″ NPT (male inlet/outlet)
- Pressure Rating: 0–20 PSI maximum
- Valve Type: 2-way, 2-position, normally closed
- Actuation: Solenoid-piloted diaphragm
- Switch: Proof of closure (1-amp rated)
- Material: Aluminum body, NBR seals and disc, 305 stainless steel core tube
- Enclosure Rating: NEMA 1
- Fluid: Fuel gas (natural gas, propane, LP gas)
Typical Applications
The ASCO 8043B038 is ideal for:
- Commercial and industrial gas burners and furnaces
- Pilot and main-line fuel shutoff in heating and combustion systems
- Appliances requiring fail-safe gas cutoff on power loss
- Systems requiring visual confirmation of valve position and proof-of-closure monitoring
- Low-pressure fuel gas distribution (under 20 PSI)
Compatibility & Replacements
Compatible With
- Commercial gas burner control systems
- Industrial furnace and boiler applications
- Standard 110/120V AC power supplies (50/60 Hz)
- NPT-threaded piping systems (3/4″ port)
- Fuel gas pilot and main-line circuits up to 20 PSI
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The ASCO 8043B038 is part of the Series 8043 (043) family; similar-series models may include variants with different port sizes or voltage ratings.
Works With
- ASCO/Emerson burner control modules and flame-safeguard systems
- Standard 110/120V AC industrial and commercial control circuits
- Proof-of-closure safety monitoring and interlock systems
- Natural gas, propane (LP), and mixed fuel gas delivery systems
