Description
Lennox 12J37 Thermostatic Expansion Valve Overview
The Lennox 12J37 is a factory-engineered thermostatic expansion valve (TXV) designed for 5-ton HVAC applications. Featuring a 3/8″ ODM inlet connection and a 1/2″ ODF outlet connection, this valve delivers precise refrigerant metering to maintain optimal evaporator performance and system efficiency. As a genuine Lennox OEM replacement component, the 12J37 is built to exact factory specifications, ensuring a reliable, drop-in fit for compatible Lennox systems.
Key Features
- Genuine Lennox OEM thermostatic expansion valve
- Rated for 5-ton HVAC system capacity
- 3/8″ ODM inlet connection for secure, leak-free installation
- 1/2″ ODF outlet connection for compatibility with standard line sets
- Precision refrigerant metering for consistent evaporator superheat control
- Engineered for direct OEM replacement in compatible Lennox equipment
- Durable construction for long-term, reliable operation
How a TXV Works
A thermostatic expansion valve regulates the flow of liquid refrigerant into the evaporator coil based on suction line superheat. By maintaining the correct superheat level, the TXV maximizes heat transfer efficiency, protects the compressor from liquid slugging, and ensures stable system operation across varying load conditions.
Application
- Direct OEM replacement for compatible Lennox 5-ton split systems and packaged units
- Suitable for residential and light commercial HVAC applications
- Designed for use with the refrigerant type specified by the original Lennox equipment
Specifications
- SKU: 12J37
- Brand: Lennox
- Valve Type: Thermostatic Expansion Valve (TXV)
- System Capacity: 5 Ton
- Inlet Connection: 3/8″ ODM
- Outlet Connection: 1/2″ ODF
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