interchangeable expansion valve 1.For R22,R134A,R407A,R507/404A 2. easy to change driving head and valve disc 3.MOP interchangeable expansion ... against excessive evaporating pressure.l Input and output type and size according to customers requirement.l Suitable for R22, R134a, R407C, R507/404A.l ... round,reduces superheat 0.3°C. interchangeable expansion valve, for R22,R134A,R407A,R507/404A(TCL/TRF)