Description
The Lennox 21772 is a heavy-duty, 2-way normally closed solenoid valve engineered for reliable general-service fluid control in demanding HVAC and mechanical applications. Designed for both air and water service, this pilot-operated valve delivers consistent shutoff performance across a wide operating pressure range.
Key Features
- 2-way, normally closed configuration ensures fail-safe shutoff when de-energized
- Pilot-operated design for efficient actuation across the full pressure range
- 1/2″ NPT port connections for straightforward installation into standard piping systems
- 4 Cv flow coefficient supports robust flow capacity for air and water media
- Operating pressure range: 0–150 PSI
- 120VAC coil voltage for compatibility with standard commercial power supplies
- Brass body construction provides excellent corrosion resistance and long service life
- NBR (Buna-N) seals offer reliable sealing performance with water and air media
- High-temperature coil rated for elevated operating environments
- NEMA 4X enclosure with junction box provides protection against dust, moisture, and corrosion — suitable for indoor and outdoor installations
- Screw terminals in the junction box allow for fast, secure field wiring
- Manual operator included for system testing and emergency override without electrical power
Specifications
- SKU: 21772
- Brand: Lennox
- Valve Type: 2-Way Normally Closed, Pilot Operated
- Port Size: 1/2″ NPT
- Voltage: 120VAC
- Flow Coefficient (Cv): 4
- Pressure Range: 0–150 PSI
- Media: Air and Water
- Body Material: Brass
- Seal Material: NBR (Nitrile Butadiene Rubber)
- Enclosure Rating: NEMA 4X
- Coil Type: High Temperature
- Wiring: Screw Terminals via Junction Box
- Manual Override: Yes
Applications
- HVAC air and water control systems
- Commercial and industrial fluid shutoff applications
- General-service pneumatic and hydraulic circuits
- Environments requiring weatherproof or corrosion-resistant enclosures (NEMA 4X)
- Systems requiring manual override capability for maintenance or emergency use
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