thermal expansion valve: 1.For R22,R134A,R407A,R507/404A 2.Easy to change driving head and valve disc 3.MOP thermal expansion valveCharacteristicsl 1. ... type and size according to customers requirement.l 5. Suitable for R22, R134a, R407C, R507/404A.l 6. If you ... .Turn adjusting stem anticlockwise one round,reduces superheat 0.3. thermal expansion valve for R22,T134A R407C R507/404A(TCL/TRF)