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 ... size according to customers requirement.l Suitable for R22, R134a, R407C, R507/404A.l If you have special ... one round,reduces superheat 0.3°C. air conditioner expansion valve, for R22,R134A,R407A,R507/404A(TCL/TRF)