Description
ASCO 8220G31 2-Way Normally Closed Solenoid Valve Overview
The ASCO 8220G31 is a heavy-duty, pilot-operated solenoid valve engineered for demanding steam and hot water applications in commercial and industrial HVAC systems. Featuring a 2″ NPT connection and a robust brass body, this normally closed valve delivers reliable on/off fluid control with a high flow capacity of 43 Cv — making it an ideal choice for large-diameter piping systems where flow performance is critical.
Key Features
- 2-way, normally closed (NC) pilot-operated design for reliable shutoff
- 2″ NPT pipe connection for straightforward installation into standard piping
- High flow coefficient of 43 Cv for minimal pressure drop in large-flow applications
- 120VAC coil voltage for compatibility with standard commercial electrical systems
- Brass body construction for excellent corrosion resistance and durability
- EPDM diaphragm material rated for both steam and hot water service
- NEMA 4X enclosure rating — suitable for indoor and outdoor use, including washdown and corrosive environments
- Steam service pressure range: 5–125 PSI
- Hot water service pressure range: 5–150 PSI
Application Suitability
The ASCO 8220G31 is purpose-built for steam distribution, hydronic heating, and hot water control systems. The pilot-operated mechanism allows the valve to handle high-pressure differentials efficiently, while the EPDM diaphragm ensures compatibility with steam and high-temperature water media. The NEMA 4X-rated enclosure protects the solenoid coil against moisture, dust, and corrosive atmospheres — making it well-suited for boiler rooms, mechanical rooms, and outdoor installations.
Specifications
- Brand: ASCO
- Model / SKU: 8220G31
- Valve Type: 2-Way Solenoid Valve
- Operation: Normally Closed (NC), Pilot Operated
- Pipe Size: 2″ NPT
- Flow Coefficient (Cv): 43
- Coil Voltage: 120VAC
- Body Material: Brass
- Diaphragm Material: EPDM
- Enclosure Rating: NEMA 4X
- Steam Pressure Range: 5–125 PSI
- Hot Water Pressure Range: 5–150 PSI
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