... &welded junction 4,single-track flow Brief introduction1, RF type expansion valve is a traditional thermal expansion valve.2, ... It is suitable for the supply of the refrigerant in dry-type evaporator.4, It can control automatically by the superheat ... welded junction.6, The capillry's length of RF type expansion valve is a standard of 1.5 meters. ... 53.512.310600RFW22-5.06.522.919800 RF type expansion valve