York 023-21927-000 Radiator Cap

The York 023-21927-000 is an OEM HVAC radiator cap engineered for heavy-duty industrial cooling applications, specifically within the secondary cooling circuits of York chillers and air-handling units. This 7 PSI pressure cap is critical for maintaining precise internal system pressures, preventing coolant cavitation, and ensuring efficient thermal transfer across condenser components. As a direct Johnson Controls replacement part, it features a heavy-duty spring-loaded relief mechanism that accurately regulates pressure and allows for atmospheric normalization via an integrated vacuum break. Designed for high-temperature service, this chiller expansion tank cap ensures a hermetic seal on standard filler necks, mitigating fluid loss and protecting pump seals from air entrapment. When performing preventative maintenance on liquid-cooled systems, installing the York 023-21927-000 ensures the pressure relief setpoint remains within factory specifications, preventing over-pressurization of the cooling assembly and maintaining peak chiller cooling efficiency.

Key Benefits

• Precise 7 PSI pressure regulation for industrial cooling loops.
• Industrial-grade metal construction for chemical resistance and thermal stability.
• Dual-action valve functionality allows for seamless pressure relief and vacuum recovery.
• OEM compatibility ensures direct fitment on York Millennium and standard liquid-cooled HVAC equipment.

Common Questions

What is the relief pressure rating for the York 023-21927-000?
This component is rated for 7 PSI, which is the standard specification for these specific industrial liquid-cooled circuits.

Can this cap be used on high-pressure steam systems?
No, this part is specifically designed for low-pressure coolant expansion tanks and radiators; verify your system operating pressure before installation.

What is the primary cause of failure for this radiator cap?
Over time, sediment buildup or seal degradation can lead to pressure loss or vacuum failure, necessitating a direct OEM replacement to restore system trim.

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.