Description
ASCO 8040G21 Two-Way Normally Closed Solenoid Valve
The ASCO 8040G21 is a two-way, normally closed solenoid valve engineered specifically for fuel gas applications. With a durable aluminum body, NBR seals, and a NEMA 4X-rated enclosure, this valve delivers reliable shutoff performance in demanding commercial and industrial HVAC environments where moisture resistance and corrosion protection are essential.
Key Features
- Two-way, normally closed (N/C) operation — valve closes automatically when de-energized for fail-safe fuel shutoff
- 3/8″ NPT port connection for straightforward installation into standard gas piping
- 120VAC coil voltage for compatibility with common commercial control circuits
- 3.9 Cv flow coefficient for efficient gas flow with minimal pressure drop
- Rated operating pressure range: 0–2 PSI, ideal for low-pressure fuel gas systems
- Aluminum body construction — lightweight yet robust for long service life
- NBR (Buna-N) seals — excellent compatibility with natural gas and other fuel gas media
- NEMA 4X enclosure rating — provides protection against dust, splashing water, and corrosion
Specifications
- SKU: 8040G21
- Brand: ASCO
- Valve Type: 2-Way Normally Closed Solenoid Valve
- Port Size: 3/8″ NPT
- Coil Voltage: 120VAC
- Flow Coefficient (Cv): 3.9
- Operating Pressure: 0–2 PSI
- Media: Fuel Gas
- Body Material: Aluminum
- Seal Material: NBR (Nitrile Butadiene Rubber)
- Enclosure Rating: NEMA 4X
Applications
- Fuel gas shutoff in commercial HVAC heating systems
- Boiler and burner gas supply control
- Low-pressure natural gas and LP gas distribution systems
- Industrial process gas control requiring weatherproof enclosures
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