Lennox 18M40 TXV
The Lennox 18M40 TXV is a precision-engineered thermostatic expansion valve (TXV) designed for high-efficiency refrigerant metering in residential and light commercial HVAC systems. This OEM Lennox replacement part features a 3/8" x 1/2" ODF (Outside Diameter Female) solder connection, ensuring a leak-resistant line set interface for technicians. Equipped with a 1/4" external equalizer and a 30-inch capillary tube, the 18M40 provides responsive superheat control by monitoring evaporator outlet pressure and temperature. By dynamically adjusting the mass flow of refrigerant, this valve maintains optimal thermal regulation across varying load conditions, preventing liquid slugging and protecting the compressor from premature wear. As a critical HVAC refrigerant metering device, the 18M40 is a direct fit for many Lennox split system evaporators and heat pumps requiring precise subcooling and superheat management. Its durable construction is built to withstand high-pressure environments, providing consistent performance and system reliability for contractors performing technical retrofits or standard maintenance on Lennox-branded cooling equipment.
Key Benefits- Precise Refrigerant Control: The 18M40 utilizes a 1/4" EQ connection to provide accurate feedback, ensuring the evaporator is fully utilized without flooding the compressor.
- Flexible Bulb Placement: A 30" capillary tube allows for versatile sensing bulb positioning on the suction line to achieve the most accurate temperature readings.
- Simplified Installation: The 3/8" x 1/2" ODF design facilitates standard brazing procedures, reducing labor time during field replacements.
- System Efficiency: Maintaining proper superheat levels through high-quality OEM components improves the overall SEER/EER rating of the HVAC unit.
What is the standard connection type for the Lennox 18M40?
This valve features ODF solder connections measuring 3/8 inch on the inlet and 1/2 inch on the outlet, standard for many residential evaporator coils.
Can I use this TXV for both air conditioning and heat pump applications?
Yes, as long as the system specifications match the 18M40 technical data, it is used in both cooling-only and heat pump systems to manage refrigerant flow effectively.
Is the 1/4" equalizer connection internal or external?
The 18M40 is an externally equalized TXV (1/4" Eq), which is necessary for systems with high pressure drops across the evaporator coil to ensure accurate superheat settings.
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: $124.58
-65%$124.58
$43.60Lennox 18M40 TXV
The Lennox 18M40 TXV is a precision-engineered thermostatic expansion valve (TXV) designed for high-efficiency refrigerant metering in residential and light commercial HVAC systems. This OEM Lennox replacement part features a 3/8" x 1/2" ODF (Outside Diameter Female) solder connection, ensuring a leak-resistant line set interface for technicians. Equipped with a 1/4" external equalizer and a 30-inch capillary tube, the 18M40 provides responsive superheat control by monitoring evaporator outlet pressure and temperature. By dynamically adjusting the mass flow of refrigerant, this valve maintains optimal thermal regulation across varying load conditions, preventing liquid slugging and protecting the compressor from premature wear. As a critical HVAC refrigerant metering device, the 18M40 is a direct fit for many Lennox split system evaporators and heat pumps requiring precise subcooling and superheat management. Its durable construction is built to withstand high-pressure environments, providing consistent performance and system reliability for contractors performing technical retrofits or standard maintenance on Lennox-branded cooling equipment.
Key Benefits- Precise Refrigerant Control: The 18M40 utilizes a 1/4" EQ connection to provide accurate feedback, ensuring the evaporator is fully utilized without flooding the compressor.
- Flexible Bulb Placement: A 30" capillary tube allows for versatile sensing bulb positioning on the suction line to achieve the most accurate temperature readings.
- Simplified Installation: The 3/8" x 1/2" ODF design facilitates standard brazing procedures, reducing labor time during field replacements.
- System Efficiency: Maintaining proper superheat levels through high-quality OEM components improves the overall SEER/EER rating of the HVAC unit.
What is the standard connection type for the Lennox 18M40?
This valve features ODF solder connections measuring 3/8 inch on the inlet and 1/2 inch on the outlet, standard for many residential evaporator coils.
Can I use this TXV for both air conditioning and heat pump applications?
Yes, as long as the system specifications match the 18M40 technical data, it is used in both cooling-only and heat pump systems to manage refrigerant flow effectively.
Is the 1/4" equalizer connection internal or external?
The 18M40 is an externally equalized TXV (1/4" Eq), which is necessary for systems with high pressure drops across the evaporator coil to ensure accurate superheat settings.
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 Lennox 18M40 TXV is a precision-engineered thermostatic expansion valve (TXV) designed for high-efficiency refrigerant metering in residential and light commercial HVAC systems. This OEM Lennox replacement part features a 3/8" x 1/2" ODF (Outside Diameter Female) solder connection, ensuring a leak-resistant line set interface for technicians. Equipped with a 1/4" external equalizer and a 30-inch capillary tube, the 18M40 provides responsive superheat control by monitoring evaporator outlet pressure and temperature. By dynamically adjusting the mass flow of refrigerant, this valve maintains optimal thermal regulation across varying load conditions, preventing liquid slugging and protecting the compressor from premature wear. As a critical HVAC refrigerant metering device, the 18M40 is a direct fit for many Lennox split system evaporators and heat pumps requiring precise subcooling and superheat management. Its durable construction is built to withstand high-pressure environments, providing consistent performance and system reliability for contractors performing technical retrofits or standard maintenance on Lennox-branded cooling equipment.
Key Benefits- Precise Refrigerant Control: The 18M40 utilizes a 1/4" EQ connection to provide accurate feedback, ensuring the evaporator is fully utilized without flooding the compressor.
- Flexible Bulb Placement: A 30" capillary tube allows for versatile sensing bulb positioning on the suction line to achieve the most accurate temperature readings.
- Simplified Installation: The 3/8" x 1/2" ODF design facilitates standard brazing procedures, reducing labor time during field replacements.
- System Efficiency: Maintaining proper superheat levels through high-quality OEM components improves the overall SEER/EER rating of the HVAC unit.
What is the standard connection type for the Lennox 18M40?
This valve features ODF solder connections measuring 3/8 inch on the inlet and 1/2 inch on the outlet, standard for many residential evaporator coils.
Can I use this TXV for both air conditioning and heat pump applications?
Yes, as long as the system specifications match the 18M40 technical data, it is used in both cooling-only and heat pump systems to manage refrigerant flow effectively.
Is the 1/4" equalizer connection internal or external?
The 18M40 is an externally equalized TXV (1/4" Eq), which is necessary for systems with high pressure drops across the evaporator coil to ensure accurate superheat settings.
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.
