Description
The Lennox 21706 is a heavy-duty 2-way, normally closed solenoid valve engineered for reliable air-fuel gas shutoff in demanding commercial and industrial HVAC and combustion applications. Featuring a robust aluminum body and high-temperature coil, this valve is built to withstand the rigors of continuous-duty gas control while delivering precise, dependable shutoff performance.
Key Features
- 2-way, normally closed configuration ensures fail-safe gas shutoff when de-energized
- 3/8″ NPT port connections for straightforward installation into standard gas piping
- 120VAC coil voltage for compatibility with common commercial control circuits
- 3.4 Cv flow coefficient supporting up to 183,000 BTU/hr capacity
- Operating pressure range: 0–50 PSI
- Aluminum body construction for lightweight durability and corrosion resistance
- NBR (Nitrile Butadiene Rubber) seals for reliable gas-tight shutoff and long service life
- NEMA 4X enclosure rating provides protection against dust, water, and corrosion
- Integrated junction box with screw terminals for simplified field wiring
- High-temperature coil rated for elevated operating environments
Specifications
- SKU: 21706
- Brand: Lennox
- Valve Type: 2-Way Solenoid, Normally Closed
- Connection Size: 3/8″ NPT
- Coil Voltage: 120VAC
- Flow Coefficient (Cv): 3.4
- BTU Capacity: 183,000 BTU/hr
- Pressure Range: 0–50 PSI
- Body Material: Aluminum
- Seal Material: NBR (Nitrile Butadiene Rubber)
- Enclosure Rating: NEMA 4X
- Electrical Connection: Junction Box with Screw Terminals
- Coil Type: High Temperature
- Media: Air / Fuel Gas
Application
The Lennox 21706 solenoid valve is ideal for use in gas burner systems, commercial heating equipment, and industrial combustion controls where a dependable normally closed gas shutoff is required. The NEMA 4X-rated enclosure makes it suitable for both indoor and outdoor installations where exposure to moisture or contaminants is a concern. The junction box with screw terminals simplifies wiring during installation and service.
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