air conditioner expansion valve 1.For R22,R134A,R407A,R507/404A 2. easy to change driving head and valve disc 3.Port:7/8 ... 9/8 air conditioner expansion valve Characteristics:l Interchangeable orifice assembly ... adjusting stem anticlockwise one round,reduces superheat 0.3°C. air conditioner expansion valve, for R22,R134A,R407A,R507/404A(TCL/TRF)