ASCO 8220G406 Solenoid Valve

The ASCO 8220G406 Solenoid Valve is a high-performance, 2-way normally closed pilot-operated valve designed specifically for the rigorous demands of steam and hot water applications. Constructed with a durable brass body and high-grade EPDM diaphragms, this unit offers up to four times the service life of standard valves in high-temperature environments. It features a 1/2" NPT connection and a 4.7 Cv flow coefficient, ensuring efficient fluid management in industrial process control and HVAC systems. Operating at 120VAC, the valve manages pressures between 5 and 125 PSI for steam and up to 150 PSI for hot water. Its specialized NEMA 4X enclosure provides superior protection against corrosion and moisture, making it suitable for indoor, outdoor, and washdown locations. With a threaded bonnet design for simplified maintenance, this ASCO RedHat valve is an essential component for reliable boiler and heating system regulation.

Key Benefits

• Extended Service Life: Advanced EPDM elastomer and pilot-operated design provide exceptional durability in steam and hot water cycles.
• Environmental Resilience: The NEMA 4X rating ensures the solenoid remains protected in harsh, corrosive, or washdown environments.
• Efficient Flow Control: A high 4.7 Cv rating paired with a normally closed failsafe position ensures optimized performance for medium-capacity systems.
• Easy Maintenance: The threaded bonnet allows for quick internal inspection and cleaning without removing the entire valve from the piping.
• Broad Certification: Meets stringent industry safety standards, including UL and CSA listings for industrial fluid control.

Common Questions

What is the maximum temperature rating for the ASCO 8220G406?
This valve is engineered for high-temperature media, typically handling steam and hot water up to 300°F (149°C), depending on the specific pressure configuration.

Can this valve be mounted in any orientation?
For optimal performance and to prevent debris accumulation in the pilot orifice, it is recommended to mount the valve with the solenoid vertical and upright.

Does the 8220G406 require a minimum differential pressure?
Yes, as a pilot-operated valve, it requires a minimum pressure differential of 5 PSI to ensure the diaphragm opens and closes correctly.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.