Lennox 97M79 Piston
The Lennox 97M79 Piston is a precision-engineered fixed orifice metering device designed for specific HVAC refrigerant flow control applications. Featuring a .082 orifice size, this Lennox replacement part ensures accurate refrigerant expansion into the evaporator coil, maintaining the pressure drop necessary for optimal system cooling capacity. Built for R-410A compatibility, the 97M79 piston is a critical component for technicians performing system BTU matching or field adjustments on Lennox heat pumps and AC units. This brass-constructed metering piston provides a reliable, non-adjustable alternative to TXVs in residential split systems where simple, durable flow regulation is required. Always verify the piston sizing chart in the unit specifications to ensure this .082 bore diameter aligns with the liquid line requirements and indoor coil configuration of the specific model being serviced to prevent liquid slugging or reduced heat transfer efficiency.
Technical Benefits
- Precision Machined Orifice: The .082 bore diameter ensures exact refrigerant flow rates for consistent thermal performance.
- Durable Brass Construction: Resists copper-to-brass corrosion and stands up to high-pressure R-410A refrigerant cycles.
- Standardized Fitment: Designed to seat perfectly within the Lennox piston body or distributor assembly for leak-free operation.
- OEM Compatibility: Ensures the system operates within original factory specifications for pressure and subcooling.
Common Questions
How do I verify if a .082 piston is the correct size for my Lennox unit?
Consult the manufacturer's outdoor unit nameplate or service manual; the required piston size is determined by the outdoor unit's capacity and the specific indoor coil match-up.
Can the 97M79 piston be used with R-22 systems?
While physically compatible with many housings, this orifice size is specifically calibrated for the flow characteristics of R-410A systems. Proper refrigerant-specific sizing is mandatory for system longevity.
Does this piston include the O-ring?
The 97M79 generally refers to the piston itself; it is standard practice for technicians to inspect or replace the housing seal during any metering device service to ensure a vacuum-tight seal.
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: $11.94
-65%$11.94
$4.18Lennox 97M79 Piston
The Lennox 97M79 Piston is a precision-engineered fixed orifice metering device designed for specific HVAC refrigerant flow control applications. Featuring a .082 orifice size, this Lennox replacement part ensures accurate refrigerant expansion into the evaporator coil, maintaining the pressure drop necessary for optimal system cooling capacity. Built for R-410A compatibility, the 97M79 piston is a critical component for technicians performing system BTU matching or field adjustments on Lennox heat pumps and AC units. This brass-constructed metering piston provides a reliable, non-adjustable alternative to TXVs in residential split systems where simple, durable flow regulation is required. Always verify the piston sizing chart in the unit specifications to ensure this .082 bore diameter aligns with the liquid line requirements and indoor coil configuration of the specific model being serviced to prevent liquid slugging or reduced heat transfer efficiency.
Technical Benefits
- Precision Machined Orifice: The .082 bore diameter ensures exact refrigerant flow rates for consistent thermal performance.
- Durable Brass Construction: Resists copper-to-brass corrosion and stands up to high-pressure R-410A refrigerant cycles.
- Standardized Fitment: Designed to seat perfectly within the Lennox piston body or distributor assembly for leak-free operation.
- OEM Compatibility: Ensures the system operates within original factory specifications for pressure and subcooling.
Common Questions
How do I verify if a .082 piston is the correct size for my Lennox unit?
Consult the manufacturer's outdoor unit nameplate or service manual; the required piston size is determined by the outdoor unit's capacity and the specific indoor coil match-up.
Can the 97M79 piston be used with R-22 systems?
While physically compatible with many housings, this orifice size is specifically calibrated for the flow characteristics of R-410A systems. Proper refrigerant-specific sizing is mandatory for system longevity.
Does this piston include the O-ring?
The 97M79 generally refers to the piston itself; it is standard practice for technicians to inspect or replace the housing seal during any metering device service to ensure a vacuum-tight seal.
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
Shipping & Returns
Shipping & Returns
Description
The Lennox 97M79 Piston is a precision-engineered fixed orifice metering device designed for specific HVAC refrigerant flow control applications. Featuring a .082 orifice size, this Lennox replacement part ensures accurate refrigerant expansion into the evaporator coil, maintaining the pressure drop necessary for optimal system cooling capacity. Built for R-410A compatibility, the 97M79 piston is a critical component for technicians performing system BTU matching or field adjustments on Lennox heat pumps and AC units. This brass-constructed metering piston provides a reliable, non-adjustable alternative to TXVs in residential split systems where simple, durable flow regulation is required. Always verify the piston sizing chart in the unit specifications to ensure this .082 bore diameter aligns with the liquid line requirements and indoor coil configuration of the specific model being serviced to prevent liquid slugging or reduced heat transfer efficiency.
Technical Benefits
- Precision Machined Orifice: The .082 bore diameter ensures exact refrigerant flow rates for consistent thermal performance.
- Durable Brass Construction: Resists copper-to-brass corrosion and stands up to high-pressure R-410A refrigerant cycles.
- Standardized Fitment: Designed to seat perfectly within the Lennox piston body or distributor assembly for leak-free operation.
- OEM Compatibility: Ensures the system operates within original factory specifications for pressure and subcooling.
Common Questions
How do I verify if a .082 piston is the correct size for my Lennox unit?
Consult the manufacturer's outdoor unit nameplate or service manual; the required piston size is determined by the outdoor unit's capacity and the specific indoor coil match-up.
Can the 97M79 piston be used with R-22 systems?
While physically compatible with many housings, this orifice size is specifically calibrated for the flow characteristics of R-410A systems. Proper refrigerant-specific sizing is mandatory for system longevity.
Does this piston include the O-ring?
The 97M79 generally refers to the piston itself; it is standard practice for technicians to inspect or replace the housing seal during any metering device service to ensure a vacuum-tight seal.
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.
