MODEL "D" PRESSURE REDUCING REGULATOR,TFE GASKETS (OPT-45) 1" SIZE; WCB BODY & SPRING CHAMBER; M3 TRIM: MONEL TRIM WITH FLUOROCARBON ELASTOMER (FKM) SEAT,GYLON DIAPHRAGM; SPECIAL END CONNECTION; 10-40 PSIG RANGE SPRING; PER SPQ NUMBER 52356 SPECIAL CONSTRUCTION FOR CHLORINE SERVICE (OPT-57) CLEAN PER CASHCO SPEC #S-1589; EPOXY PAINTED (OPT-95); 1.5" 300# RAISED FACE FLANGES;