thermal expansion valve: 1.For R22,R134A,R407A,R507/404A 2.Easy to change driving head and valve disc 3.MOP thermal expansion ... evaporating pressure.l 4. Input and output type and size according to customers requirement.l 5. Suitable for R22, R134a, R407C, R507 ... adjusting stem anticlockwise one round,reduces superheat 0.3. thermal expansion valve for R22,T134A R407C R507/404A(TCL/TRF)