Copeland 910-0351-02 Cooling Valve

The Copeland 910-0351-02 Demand Cooling Valve is a critical component for maintaining safe discharge temperatures in low-temperature refrigeration applications. Engineered specifically for Copeland Discus compressors, this injection valve works in tandem with the Demand Cooling module to monitor head temperatures via a dedicated sensor. When discharge gas reaches critical thresholds, the valve meters a controlled amount of saturated refrigerant into the suction cavity. This liquid injection system effectively lowers the temperature of the suction gas, preventing oil carbonization and protecting the internal reed valves and pistons from thermal stress. It is a standard requirement for R-22 low-temp systems and compatible with modern HFC and HFO blends like R-448A and R-449A. This HVACR replacement part ensures efficient refrigerant flow regulation, maintaining system stability even under high compression ratios. The 5.5-inch compact body and robust solenoid construction allow for direct integration into existing demand cooling headers without extensive piping modifications.

• Thermal Protection: Prevents compressor overheating by injecting liquid refrigerant directly into the suction stream.
• System Longevity: Helps avoid oil "coking" and sludge formation, preserving the lubrication properties of the POE or mineral oil.
• High-Temperature Mitigation: Maintains discharge temperatures within safe operating limits for commercial refrigeration systems.
• Wide Compatibility: Designed for use with 2D, 3D, 4D, and 6D Copeland Discus compressor bodies.
• Operational Efficiency: Reduces compressor downtime caused by thermal trips and high-pressure limit cutouts.

When should the Demand Cooling Valve be replaced?
If you notice the valve body is heavily iced while the compressor is off, or if discharge temperatures remain high despite the module signaling for injection, the internal orifice may be stuck open or clogged. We recommend verifying the solenoid coil voltage before replacing the valve body.

Is a filter drier required for this valve?
Yes. To protect the small solenoid orifice from debris, a liquid line filter drier capable of removing particles down to 25 microns must be installed upstream of the injection valve inlet.

Can this valve be used with R-404A systems?
While often utilized in R-22 retrofits, this valve is compatible with various refrigerants. Always consult the specific Copeland Application Engineering bulletin for your compressor model and refrigerant type to ensure proper setpoints.

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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.