Description
The Carrier 33B0006N18 is a factory-specified thermostatic expansion valve (TXV) engineered to deliver precise refrigerant metering in Carrier cooling systems. Featuring 3/8″ ODF inlet and 3/8″ ODF outlet connections with a 15% bleed design, this valve maintains optimal superheat control across a wide range of operating conditions — helping to protect the compressor and maximize system efficiency.
Key Features
- 3/8″ x 3/8″ ODF sweat connections for straightforward field installation
- 15% bleed design ensures reliable startup and stable superheat control at low load conditions
- Thermostatic expansion valve (TXV) construction provides accurate refrigerant flow regulation
- Genuine Carrier OEM replacement part for compatible Carrier residential and light commercial systems
- Engineered to maintain proper superheat and protect the compressor from liquid slugging
Why Use a TXV?
A thermostatic expansion valve automatically adjusts refrigerant flow based on the evaporator’s superheat, ensuring the coil is fully utilized without allowing liquid refrigerant to reach the compressor. The 15% bleed feature allows a small, controlled amount of refrigerant to bypass the valve seat, supporting consistent performance during low-load or startup conditions and preventing hunting.
Product Specifications
- SKU: 33B0006N18
- Brand: Carrier
- Inlet Connection: 3/8″ ODF
- Outlet Connection: 3/8″ ODF
- Bleed Type: 15% Bleed
- Valve Type: Thermostatic Expansion Valve (TXV)
- Application: Carrier residential and light commercial HVAC systems
Installation Notes
Always recover refrigerant and depressurize the system before replacing the TXV. Use proper brazing techniques on ODF sweat connections and verify superheat settings after installation to confirm correct operation. Consult the applicable Carrier service manual for system-specific torque and superheat specifications.
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