ASCO 8220G404 Solenoid Valve

The ASCO 8220G404 is a professional-grade 2-way normally closed solenoid valve engineered for demanding high-temperature applications. Featuring a robust brass body and reliable EPDM diaphragm, this pilot operated valve is optimized for 120V/60Hz AC electrical systems. With a 1/2" NPT connection and a 4.7 Cv flow coefficient, it maintains precise fluid control across variable pressures. It handles 5-50 PSI for steam service and 5-150 PSI for hot water applications. The unit is housed in a NEMA 4X enclosure, providing superior protection against corrosion and moisture in industrial environments. Designed for rapid cycling and long-term durability in mechanical rooms, this ASCO RedHat valve ensures consistent 120Vac solenoid performance without the risk of premature seat failure common in lower-spec components. It is the industrial standard for efficient thermal management and fluid isolation.

• High-Temperature Performance: Rated for severe hot water and steam service using high-grade EPDM seals.
• Industrial Protection: The NEMA 4X enclosure ensures watertight and corrosion-resistant operation in harsh mechanical environments.
• Optimized Flow: A 4.7 Cv value provides high-capacity throughput for 1/2" piping systems.
• Pilot Operated Reliability: Low-power 120Vac coil design provides reliable shifting under minimum differential pressure.

Common Questions

What is the minimum pressure required for the ASCO 8220G404 to operate?
As a pilot operated valve, this model requires a minimum pressure differential of 5 PSI to ensure the diaphragm lifts and seats correctly.

Can this valve be mounted in any orientation?
For optimal service life and to prevent sediment buildup in the pilot orifice, it is recommended to mount the valve with the solenoid vertical and upright, though it can be installed in other positions if necessary.

Is the EPDM seal compatible with petroleum-based fluids?
No, EPDM is specifically designed for hot water and steam. For oils or fuels, a Viton or FKM seal variant should be used to prevent seal swelling and failure.

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.