MODEL "8310HP" PRESSURE REDUCING REGULATOR, GRAPHITE/NBR GASKETS 3" SIZE; WCB BODY & SPRING CHAMBER; S5 TRIM: 316SST METAL SEAT,FLUOROCARBON ELASTOMER (FKM) DIAPHRAGM; 150 LB RAISED FACE FLANGES; 10-40 PSIG RANGE SPRING; PER SPQ NUMBER 51344 WITH SST VENT FILTER; WITH CLOSING CAP;