Lennox 12J35 Expansion Valve
The Lennox 12J35 Expansion Valve is a precision-engineered NXT thermostatic expansion valve specifically calibrated for HVAC systems in the 3 to 3.5 ton capacity range. Designed for indoor evaporator coils, this TXV utilizes a responsive sensing bulb to modulate refrigerant flow in real-time, maintaining precise static superheat across varying thermal loads. By preventing liquid slugging and evaporator starvation, the 12J35 ensures the compressor operates within its optimized design envelope, maximizing SEER2 efficiency and heat transfer performance in Lennox split systems.
For technicians in the field, the Lennox 12J35 is a critical OEM replacement part for addressing "hunting" superheat or restrictive flow issues. The thermal expansion valve (TXV) operation depends on accurate sensing bulb placement and proper insulation to ensure the diaphragm reacts correctly to suction line temperature changes. This valve is engineered for compatibility with modern R-410A high-pressure systems, providing the reliable metering required to stabilize subcooling and vapor pressure throughout the cooling cycle.
Key Benefits:
- Optimized Refrigerant Metering: Provides precise control of refrigerant flow to maintain stable evaporator saturation.
- Compressor Protection: Actively manages superheat to prevent liquid floodback, extending the service life of the outdoor unit.
- System Compatibility: Explicitly engineered for Lennox 3-3.5 ton indoor units and NXT-series applications.
- Enhanced Load Response: Rapidly adjusts to heat load fluctuations to maintain consistent discharge air temperatures.
- OEM Reliability: Direct replacement ensures proper thread pitch and bulb length for faster troubleshooting and installation.
Common Questions:
- What are the symptoms of a failing Lennox 12J35? Common signs include evaporator coil icing, high superheat readings, "hunting" suction pressures, or a significant drop in cooling capacity despite correct charge levels.
- Is the 12J35 expansion valve compatible with all refrigerants? No, this valve is specifically designed for systems using R-410A; always verify the refrigerant type on the system data plate before installation.
- Does this TXV include the internal check valve? Most NXT-type valves include an internal check valve for heat pump bypass applications, but confirm your specific coil model requirements.
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.
Lennox 12J35 Expansion Valve
The Lennox 12J35 Expansion Valve is a precision-engineered NXT thermostatic expansion valve specifically calibrated for HVAC systems in the 3 to 3.5 ton capacity range. Designed for indoor evaporator coils, this TXV utilizes a responsive sensing bulb to modulate refrigerant flow in real-time, maintaining precise static superheat across varying thermal loads. By preventing liquid slugging and evaporator starvation, the 12J35 ensures the compressor operates within its optimized design envelope, maximizing SEER2 efficiency and heat transfer performance in Lennox split systems.
For technicians in the field, the Lennox 12J35 is a critical OEM replacement part for addressing "hunting" superheat or restrictive flow issues. The thermal expansion valve (TXV) operation depends on accurate sensing bulb placement and proper insulation to ensure the diaphragm reacts correctly to suction line temperature changes. This valve is engineered for compatibility with modern R-410A high-pressure systems, providing the reliable metering required to stabilize subcooling and vapor pressure throughout the cooling cycle.
Key Benefits:
- Optimized Refrigerant Metering: Provides precise control of refrigerant flow to maintain stable evaporator saturation.
- Compressor Protection: Actively manages superheat to prevent liquid floodback, extending the service life of the outdoor unit.
- System Compatibility: Explicitly engineered for Lennox 3-3.5 ton indoor units and NXT-series applications.
- Enhanced Load Response: Rapidly adjusts to heat load fluctuations to maintain consistent discharge air temperatures.
- OEM Reliability: Direct replacement ensures proper thread pitch and bulb length for faster troubleshooting and installation.
Common Questions:
- What are the symptoms of a failing Lennox 12J35? Common signs include evaporator coil icing, high superheat readings, "hunting" suction pressures, or a significant drop in cooling capacity despite correct charge levels.
- Is the 12J35 expansion valve compatible with all refrigerants? No, this valve is specifically designed for systems using R-410A; always verify the refrigerant type on the system data plate before installation.
- Does this TXV include the internal check valve? Most NXT-type valves include an internal check valve for heat pump bypass applications, but confirm your specific coil model requirements.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Lennox 12J35 Expansion Valve is a precision-engineered NXT thermostatic expansion valve specifically calibrated for HVAC systems in the 3 to 3.5 ton capacity range. Designed for indoor evaporator coils, this TXV utilizes a responsive sensing bulb to modulate refrigerant flow in real-time, maintaining precise static superheat across varying thermal loads. By preventing liquid slugging and evaporator starvation, the 12J35 ensures the compressor operates within its optimized design envelope, maximizing SEER2 efficiency and heat transfer performance in Lennox split systems.
For technicians in the field, the Lennox 12J35 is a critical OEM replacement part for addressing "hunting" superheat or restrictive flow issues. The thermal expansion valve (TXV) operation depends on accurate sensing bulb placement and proper insulation to ensure the diaphragm reacts correctly to suction line temperature changes. This valve is engineered for compatibility with modern R-410A high-pressure systems, providing the reliable metering required to stabilize subcooling and vapor pressure throughout the cooling cycle.
Key Benefits:
- Optimized Refrigerant Metering: Provides precise control of refrigerant flow to maintain stable evaporator saturation.
- Compressor Protection: Actively manages superheat to prevent liquid floodback, extending the service life of the outdoor unit.
- System Compatibility: Explicitly engineered for Lennox 3-3.5 ton indoor units and NXT-series applications.
- Enhanced Load Response: Rapidly adjusts to heat load fluctuations to maintain consistent discharge air temperatures.
- OEM Reliability: Direct replacement ensures proper thread pitch and bulb length for faster troubleshooting and installation.
Common Questions:
- What are the symptoms of a failing Lennox 12J35? Common signs include evaporator coil icing, high superheat readings, "hunting" suction pressures, or a significant drop in cooling capacity despite correct charge levels.
- Is the 12J35 expansion valve compatible with all refrigerants? No, this valve is specifically designed for systems using R-410A; always verify the refrigerant type on the system data plate before installation.
- Does this TXV include the internal check valve? Most NXT-type valves include an internal check valve for heat pump bypass applications, but confirm your specific coil model requirements.
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.
