MODEL "HP" PRESSURE REDUCING REGULATOR,GRAPHITE/NBR GASKETS 1" SIZE; WCB BODY & SPRING CHAMBER; SPECIAL TRIM MATERIAL; OPT-30: 600 LB RAISED FACE FLANGES; 30-150 PSIG RANGE SPRING; PER SPQ NUMBER 50703 TRIM: 316SST METAL SEAT,FKM DIAPH; DIFFERENTIAL CONST'N (-1+6 OPT);