MODEL "1000HP-1+6" DIFF PRESS REG,SGL DIAPH,GRAPHITE/NBR GASKETS; 3/4" SIZE,GASEOUS JET; WCB BODY,CAST IRON SPRING CHAMBER WITH CLOSING CAP; S2 TRIM: METAL SEAT,316SST CYLINDER,416SST PLUG,302SST DIAPHRAGM; 300 LB RAISED FACE FLANGES (OPT-30); 10-40 PSIG RANGE SPRING; PER CASHCO DRAWING NUMBER 50997 - W/ 63/125 MICRO-INCH RA FLANGES;