MODEL "DA1" PRESSURE REDUCING REGULATOR (SERIES I) BODY SIZE 1",STANDARD DIAPHRAGM CONSTRUCTION; CARBON STEEL BODY & CARBON STEEL SPRING CHAMBER; SPECIAL TRIM MATERIALS; 300 LB RAISED FACE FLANGES; 70-200 PSIG RANGE SPRING; PER SPQ NUMBER 55233 STANDARD DIAPHRAGM CONSTRUCTION; 316L SST TRIM, V-TFE SEAT, BC DIAPHRAGM, NBR STATIC SEAL, O-RING DYNAMIC SEAL; INTERNAL SENSING, FLOW TO OPEN; NO PRESSURE BEARING PARTS FROM CHINA OR INDIA;