MODEL "SAP" DO-ALL PRESSURE LOADED REDUCING REGULATOR, BODY SIZE 1", LARGE PISTON CONSTRUCTION; BAR STOCK 316L SST BODY & COVER DOME; 316L SST PLUG & CAGE, POLYALL SEAT; FKM O-RING STATIC SEAL; TFE U-CUP W/SST ENERGIZER DYNAMIC SEAL & SILVER C-RING DIAPHRAGM SEAL; TUBE END BW CONNECTIONS; NO RANGE SPRING, PRESSURE LOADED; INTERNAL SENSING, 2-5 PSIG LOWER SPRING; OPT-77: HIGH PURITY ELECTRO POLISH TO 10Ra AVG. FINISH; CLEANED TO SPEC #S-1662; HELIUM LEAK TEST PER SPEC #S-1661