Enhanced Efficiency: The ZF refrigeration scroll design offers higher volumetric efficiency compared to reciprocating units

Gaskets should be inspected and typically replaced whenever the valve is disassembled for cleaning or if there is visible moisture at the union connections

Mixing motor series may result in uneven positioning or signal loss

Designed for durability and balance

Lennox 99K40 TXV 321042-401 Enhanced Efficiency: The ZF refrigerationThe Lennox 99K40 is a high performance HVAC thermal expansion valve engineered for precision refrigerant metering in large capacity 8 ton air conditioning systems and heat pump equipment. Featuring a 3 8" x 7 8" ODF (Outside Diameter Fitting) connection and a 30 inch capillary tube, this OEM component is designed to replace aging or failing valves in Lennox split systems, ensuring the evaporator receives the exact refrigerant charge needed to maintain