O-ring Expansion Valve
Standard O-ring thermostatic expansion valve for most aftermarket systems. This is the most common oring expansion valve used on aftermarket and original applications. The male fittings sizes are:
- 3/4"-16 male oring thread; connects to the evaporator
- 5/8"-18 male oring thread; connects to the liquid line which runs to the condenser
This valve is compatible with R-12 and R-134a refrigerants.


