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

This unit requires a minimum 5 psi pressure differential to actuate and supports maximum operating pressures up to 200 psi for air and 150 psi for water

the motor shaft must be mounted in a horizontal orientation

88004111 is the cross for 0391003

The HVAC high pressure cutout is calibrated to trigger at 375 PSI

Lennox 99K40 TXV 321042-401 Gaskets should be inspected andThe 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