MODEL "1000HP-1+8" DIFF PRESS REG,DBL DIAPH,GRAPHITE/NBR GASKETS 1/2" SIZE,GASEOUS JET; WCC BODY,WCB SPRING CHAMBER WITH CLOSING CAP; S2 TRIM: METAL SEAT,316SST CYLINDER,416SST PLUG,302SST DIAPHRAGM; NPT SCREWED; 40-100 PSID RANGE SPRING; PER SPQ NUMBER 57570 OPT-12: ONE-STEP REDUCED ORIFICE; OPT-95: EPOXY PAINTED PER SPEC #S-1547; WITH HIGH TEMP GASKETS;