MODEL "DA4"SALES KIT FOR PRODUCT CODE: D48-1P57-10100000E; PRESSURE LOADED REDUCING REGULATOR (SERIES IV)-PLPRV BODY SIZE 1-1/2",STANDARD DIAPHRAGM CONSTRUCTION; DUCTILE IRON BODY & LOADING CHAMBER; 17-4PH SST TRIM, 316L SST CAGE, PA SEAT, NBR DIAPHRAGM, NBR STATIC SEAL, O-RING DYNAMIC SEAL