York S1-3924-3021 Process Valve

The York S1-3924-3021 Process Valve is a critical OEM replacement part designed for high-performance fluid management within residential and light commercial HVAC systems. Specifically engineered as a 3/8" One-Shot Process Valve, this component is utilized primarily in the liquid line of York's BRCQ and BRHQ series units. Its one-shot design is built to facilitate rapid refrigerant charging and system evacuation while maintaining a hermetic seal once activated, effectively minimizing the risk of refrigerant leaks during standard maintenance cycles.

For contractors performing field repairs or system upgrades, this liquid line service valve ensures precise flow regulation to maintain optimal subcooling and superheat levels. The heavy-duty brass construction is tailored for high-pressure refrigeration cycles, providing the durability needed for veteran technicians working in demanding environments. Utilizing a genuine York HVAC part ensures exact compatibility with existing manifold sets and 1/4" and 3/8" line sets, preventing the pressure drops and fitment issues often associated with generic alternatives.

• Precision Refrigerant Control: Specifically calibrated for 3/8 inch liquid lines to ensure accurate flow rates.
• System Integrity: Designed to reduce potential refrigerant leaks during critical evacuation and charging phases.
• Direct OEM Compatibility: Verified for use in York BRCQ and BRHQ series equipment, ensuring a drop-in fit without line modifications.
• Durable Brass Construction: Engineered to withstand high vibration and thermal cycling common in condensing units.

• Is this valve resettable? No, as a one-shot process valve, it is designed for single-use activation during the manufacturing or major service process and must be replaced if the seal is compromised.
• Does this fit 3/8" suction lines? This valve is specifically designed for the liquid line; verify your line size and application pressure before installation.
• Will this work with R-410A systems? Yes, the York S1-3924-3021 is rated for standard high-pressure refrigerants used in modern HVAC equipment.

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.