Daikin-McQuay SG9980212-02 Valve & Gasket
The Daikin-McQuay SG9980212-02 is a critical 120V unloader valve and gasket assembly designed for precise capacity control in McQuay screw compressors and high-tonnage chillers. This solenoid-actuated valve manages internal pressure differentials, allowing the compressor to start under reduced load conditions and maintain system efficiency during part-load operation. Manufactured to meet OEM specifications, the SG9980212-02 valve ensures reliable cycle transitions and prevents excessive wear on the motor and internal mechanical components. The included high-temperature gasket provides a leak-proof seal against the manifold, maintaining refrigerant integrity even under fluctuating thermal stress. For technicians servicing HVAC refrigeration systems, this unloader assembly is the standard replacement part for restoring modulation accuracy in industrial chiller maintenance. Proper installation is essential for optimizing power consumption and preventing liquid slugging or short-cycling in Daikin-McQuay air-cooled or water-cooled units.
- OEM Compatibility: Specifically engineered for seamless integration with McQuay compressor unloader systems.
- Enhanced Durability: Heavy-duty solenoid coil and valve body designed for continuous industrial operation.
- System Efficiency: Restores effective capacity staging to reduce energy consumption and mechanical strain.
- Complete Kit: Includes the precision-cut gasket to ensure a vacuum-tight seal during reassembly.
Common Technical Questions
What are the symptoms of a failing unloader valve in a McQuay chiller?
Common indicators include the compressor failing to load or unload properly, high starting torque causing nuisance trips, and uneven discharge pressures during part-load operation.
Is the coil included with the SG9980212-02 assembly?
This assembly typically includes the valve body and the necessary gasket; the 120V coil configuration should be verified against the existing lead connections during the replacement process.
Can this valve be used in both R-22 and R-134a systems?
Yes, as long as the Daikin-McQuay technical manual lists this part number for the specific compressor model and lubricant type (POE vs. Mineral Oil).
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.
Original: $535.83
-65%$535.83
$187.54Daikin-McQuay SG9980212-02 Valve & Gasket
The Daikin-McQuay SG9980212-02 is a critical 120V unloader valve and gasket assembly designed for precise capacity control in McQuay screw compressors and high-tonnage chillers. This solenoid-actuated valve manages internal pressure differentials, allowing the compressor to start under reduced load conditions and maintain system efficiency during part-load operation. Manufactured to meet OEM specifications, the SG9980212-02 valve ensures reliable cycle transitions and prevents excessive wear on the motor and internal mechanical components. The included high-temperature gasket provides a leak-proof seal against the manifold, maintaining refrigerant integrity even under fluctuating thermal stress. For technicians servicing HVAC refrigeration systems, this unloader assembly is the standard replacement part for restoring modulation accuracy in industrial chiller maintenance. Proper installation is essential for optimizing power consumption and preventing liquid slugging or short-cycling in Daikin-McQuay air-cooled or water-cooled units.
- OEM Compatibility: Specifically engineered for seamless integration with McQuay compressor unloader systems.
- Enhanced Durability: Heavy-duty solenoid coil and valve body designed for continuous industrial operation.
- System Efficiency: Restores effective capacity staging to reduce energy consumption and mechanical strain.
- Complete Kit: Includes the precision-cut gasket to ensure a vacuum-tight seal during reassembly.
Common Technical Questions
What are the symptoms of a failing unloader valve in a McQuay chiller?
Common indicators include the compressor failing to load or unload properly, high starting torque causing nuisance trips, and uneven discharge pressures during part-load operation.
Is the coil included with the SG9980212-02 assembly?
This assembly typically includes the valve body and the necessary gasket; the 120V coil configuration should be verified against the existing lead connections during the replacement process.
Can this valve be used in both R-22 and R-134a systems?
Yes, as long as the Daikin-McQuay technical manual lists this part number for the specific compressor model and lubricant type (POE vs. Mineral Oil).
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.
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Description
The Daikin-McQuay SG9980212-02 is a critical 120V unloader valve and gasket assembly designed for precise capacity control in McQuay screw compressors and high-tonnage chillers. This solenoid-actuated valve manages internal pressure differentials, allowing the compressor to start under reduced load conditions and maintain system efficiency during part-load operation. Manufactured to meet OEM specifications, the SG9980212-02 valve ensures reliable cycle transitions and prevents excessive wear on the motor and internal mechanical components. The included high-temperature gasket provides a leak-proof seal against the manifold, maintaining refrigerant integrity even under fluctuating thermal stress. For technicians servicing HVAC refrigeration systems, this unloader assembly is the standard replacement part for restoring modulation accuracy in industrial chiller maintenance. Proper installation is essential for optimizing power consumption and preventing liquid slugging or short-cycling in Daikin-McQuay air-cooled or water-cooled units.
- OEM Compatibility: Specifically engineered for seamless integration with McQuay compressor unloader systems.
- Enhanced Durability: Heavy-duty solenoid coil and valve body designed for continuous industrial operation.
- System Efficiency: Restores effective capacity staging to reduce energy consumption and mechanical strain.
- Complete Kit: Includes the precision-cut gasket to ensure a vacuum-tight seal during reassembly.
Common Technical Questions
What are the symptoms of a failing unloader valve in a McQuay chiller?
Common indicators include the compressor failing to load or unload properly, high starting torque causing nuisance trips, and uneven discharge pressures during part-load operation.
Is the coil included with the SG9980212-02 assembly?
This assembly typically includes the valve body and the necessary gasket; the 120V coil configuration should be verified against the existing lead connections during the replacement process.
Can this valve be used in both R-22 and R-134a systems?
Yes, as long as the Daikin-McQuay technical manual lists this part number for the specific compressor model and lubricant type (POE vs. Mineral Oil).
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.
