Description
Carrier 331709-755 Thermal Expansion Valve Overview
The Carrier 331709-755 is an OEM thermal expansion valve (TXV) engineered specifically for R-410A refrigerant systems at a 3-ton capacity. Designed as a direct replacement for compatible Carrier cooling equipment, this TXV delivers precise refrigerant metering to maintain optimal evaporator performance, protect the compressor from liquid slugging, and maximize overall system efficiency.
How It Works
The thermal expansion valve automatically regulates the flow of liquid refrigerant into the evaporator coil based on superheat conditions at the evaporator outlet. By maintaining the correct superheat level, the valve ensures the evaporator operates at peak capacity while preventing refrigerant flooding back to the compressor — a critical function in any high-efficiency R-410A system.
Key Features
- OEM Carrier replacement part — engineered to factory specifications
- Compatible with R-410A refrigerant systems
- Rated for 3-ton capacity applications
- Precise superheat control for maximum system efficiency
- Protects compressor from liquid refrigerant slugging
- Direct drop-in replacement for compatible Carrier equipment
- Durable construction for long-term, reliable operation
Application
This TXV is intended for use in Carrier residential and light commercial split-system air conditioning and heat pump equipment using R-410A refrigerant. Always verify compatibility with your specific Carrier model before installation.
Installation Notes
- Refer to the original equipment service manual for proper installation torque, orientation, and superheat adjustment procedures
- Ensure the system is properly recovered, evacuated, and leak-tested before recharging
- Use only with R-410A refrigerant as specified
- Installation should be performed by a certified HVAC technician
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