Description
ASCO 8220G403 2-Way Normally Closed Solenoid Valve Overview
The ASCO 8220G403 is a heavy-duty, pilot-operated solenoid valve engineered for demanding steam and hot water applications in commercial and industrial HVAC systems. With a 2-way, normally closed configuration, the valve remains shut when de-energized, providing a fail-safe design that protects equipment and piping systems. The brass body construction combined with an EPDM diaphragm delivers excellent resistance to high-temperature water and steam service, making it a reliable choice for boiler rooms, hydronic heating systems, and process control installations.
Key Features
- 2-Way, Normally Closed (NC) pilot-operated design for reliable fail-safe shutoff
- 3/8″ NPT pipe connection for easy in-line installation
- 120VAC coil voltage for compatibility with standard commercial control circuits
- 4.4 Cv flow coefficient for efficient media flow management
- Rated for steam service: 5–125 PSI operating pressure range
- Rated for hot water service: 5–150 PSI operating pressure range
- Brass body construction for corrosion resistance and long service life
- EPDM diaphragm material compatible with steam and hot water media
- NEMA 4X enclosure rating — suitable for indoor/outdoor use, watertight and corrosion-resistant
Specifications
- Brand: ASCO
- Model / SKU: 8220G403
- Valve Type: 2-Way Solenoid Valve, Normally Closed
- Operation: Pilot Operated
- Pipe Size: 3/8″ NPT
- Coil Voltage: 120VAC
- Flow Coefficient (Cv): 4.4
- Steam Pressure Range: 5–125 PSI
- Hot Water Pressure Range: 5–150 PSI
- Body Material: Brass
- Diaphragm Material: EPDM
- Enclosure Rating: NEMA 4X
Applications
- Commercial and industrial steam distribution systems
- Hydronic hot water heating systems
- Boiler room piping and process control
- HVAC zone control and equipment isolation
- Environments requiring watertight or corrosion-resistant enclosures (NEMA 4X)
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