TIE Series expansion valve 1.Anticorrsion and rust-proof stainless steel power head 2.Offers differnt injection to match different application 3.Big membrane design makes valve control more sensitive 4.Attached with washable and removable inlet filtering meshwork 5.Four use on Refrigerants R134a, R22, R404A&R507 6.Inlet connection size is 3/8擲AE 7.Outlet connection size is 1/2擲AE 8.Maximum working pressure of 450 psig