National Compressor Exchange 510-0212-00 Unloader Valve

Product Description

The NATIONAL COMPRESSOR EXCHANGE 510-0212-00 is a replacement unloader valve assembly designed for use in Copeland refrigeration and air conditioning compressors. The unloader valve reduces starting torque by venting cylinder pressure during compressor startup, allowing the motor to reach operating speed before full compression load is applied. This part is a valve-only replacement, not a full kit assembly. It serves as a direct OEM-style substitute for the original 998-0212-00 unloader valve. HVAC technicians and refrigeration service pros install this component as part of compressor reconditioning or when the original valve fails to unload properly on startup.

This unloader valve assembly is suited for commercial and residential refrigeration and air conditioning systems equipped with compatible Copeland compressors. It is typically installed during compressor service calls where hard-starting conditions, burned motors, or failed startup sequences point to a defective unloader valve. The part replaces OEM part number 998-0212-00.

Key Features

• Direct OEM-style replacement for original Copeland unloader valve
• Valve-only assembly for targeted component replacement without full kit cost
• Replaces superseded part number 998-0212-00
• Designed to reduce compressor startup torque and protect motor windings
• Applicable to refrigeration and air conditioning compressor applications

Compatibility

Designed as an OEM-style replacement for Copeland compressors originally equipped with unloader valve part number 998-0212-00.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician. Disconnect and lock out electrical power to the unit and recover all system refrigerant per EPA Section 608 requirements before opening the compressor or refrigerant circuit. Follow the compressor manufacturer service documentation for valve seat seating and reassembly procedures. Do not re-energize the system until all connections are leak-tested and the refrigerant circuit is properly charged.

Technical Specifications

• Part Type: Unloader Valve Assembly (Valve Only)
• Replaces OEM Part Number: 998-0212-00

Standard Information

• Brand: NATIONAL COMPRESSOR EXCHANGE
• Manufacturer Part Number: 510-0212-00