... cloth, each end of the installation of a non-reflux valve can reverse Impurities, to the role of drying filter, ... combining, both ends of the installation of a non-reflux valve, two-way operation can intercept stolen goodsFiltration:20 micronsWith minimum pressure ... copper reserve.For a variety of refrigerant R-12, R-134a, R-22, R-404A, R-407C, R-410A, R-500, R-502, R-507.ect.Maximum working pressure:4 ...