Description
ASCO 8221G11 Two-Way Normally Closed Solenoid Valve Overview
The ASCO 8221G11 is a heavy-duty, pilot-operated solenoid valve engineered for reliable water service in commercial and industrial HVAC applications. Featuring a 2-way, normally closed configuration, this valve remains shut when de-energized and opens upon receiving a 120VAC signal — providing a safe, fail-closed design ideal for water control systems.
Key Features
- 2-Way, Normally Closed (NC) operation — valve closes automatically when de-energized
- 1-1/2″ NPT pipe connection for straightforward installation into standard piping systems
- 120VAC coil voltage for compatibility with common commercial control circuits
- High flow capacity with a 24 Cv flow coefficient, minimizing pressure drop across the valve
- Operating pressure range: 5–150 PSI, suitable for a wide range of water system pressures
- Pilot-operated design leverages line pressure for efficient actuation with a low-power coil
- Slow-closing action reduces water hammer and protects downstream piping and equipment
- Brass valve body offers excellent corrosion resistance for water service environments
- NBR (Buna-N) seals provide durable, reliable sealing for water and compatible media
- NEMA 4 enclosure rating — suitable for indoor and outdoor use, protected against splashing water and windblown rain
Specifications
- SKU / Model: 8221G11
- Brand: ASCO
- Valve Type: 2-Way Solenoid Valve
- Operation: Normally Closed (NC)
- Actuation: Pilot Operated, Slow Closing
- Port Size: 1-1/2″ NPT
- Coil Voltage: 120VAC
- Flow Coefficient (Cv): 24
- Pressure Range: 5–150 PSI
- Media: Water
- Body Material: Brass
- Seal Material: NBR (Buna-N)
- Electrical Enclosure: NEMA 4
Applications
- Commercial and industrial water control systems
- HVAC chilled and hot water piping systems
- Cooling towers and evaporative cooling equipment
- Boiler feed and makeup water lines
- General process water on/off control
Why Choose the ASCO 8221G11?
ASCO is a globally recognized leader in fluid control solutions. The 8221G11 combines a robust brass body, slow-closing pilot-operated design, and NEMA 4 weatherproof enclosure to deliver long service life and dependable performance in demanding water system environments. The high 24 Cv flow rating ensures efficient flow with minimal restriction, while the 5–150 PSI operating range covers virtually all standard commercial water system pressures.
Reviews
There are no reviews yet.