Description
The ASCO 8220G406 is a heavy-duty, pilot-operated 2-way normally closed solenoid valve engineered for demanding steam and hot water applications in commercial and industrial HVAC systems. Built with a robust brass body and EPDM diaphragm, this valve delivers reliable, leak-free shutoff across a wide range of operating pressures and temperatures.
With a 1/2″ NPT connection and a generous 4.7 Cv flow coefficient, the 8220G406 handles high-flow requirements with ease. The 120VAC coil energizes quickly and consistently, while the NEMA 4X-rated enclosure provides protection against dust, splashing water, and corrosion — making it well-suited for wet or washdown environments.
Key Features
- 2-Way, Normally Closed (N/C) operation — valve closes when de-energized for fail-safe shutoff
- Pilot-operated design for efficient, low-power actuation across the full pressure range
- 1/2″ NPT port connections for straightforward installation into standard piping
- 4.7 Cv flow coefficient for high-capacity flow control
- 120VAC coil voltage — compatible with standard commercial control circuits
- NEMA 4X enclosure rating — resists dust, moisture, and corrosion for indoor/outdoor use
- Brass body construction for durability and corrosion resistance
- EPDM diaphragm — excellent compatibility with steam and hot water media
Specifications
- Valve Type: 2-Way, Normally Closed, Pilot Operated
- Connection Size: 1/2″ NPT
- Coil Voltage: 120VAC
- Flow Coefficient (Cv): 4.7
- Steam Pressure Range: 5–125 PSI
- Hot Water Pressure Range: 5–150 PSI
- Body Material: Brass
- Diaphragm Material: EPDM
- Enclosure Rating: NEMA 4X
Applications
- Steam distribution and control systems
- Hot water heating and hydronic systems
- Commercial boiler and process piping
- Industrial HVAC and building automation
- Wet or washdown environments requiring NEMA 4X protection
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