1/2" SIZE MODEL 1088 SPRING OPERATED VACU-GARD HORIZONTAL OUTLET POSITION, INTERNAL SENSING; 316 SST BODY AND TRIM WITH CARBON STEEL DIAPHRAGM CASES; NO GAUGES; 1" 150# RF ASME THREADED REDUCING FLANGES W/NIPPLES; 100% FLOW PLUG ONE; FLUOROCARBON ELASTOMER (FKM) SOFT SEATS & SEALS; 14" - 30" WC RANGE SPRING; NO EXTERNAL FILTER; PER SPQ NUMBER 57559 WITH SPECIAL ASTM A193 B7 BOLTING & A194 2H NUTS & SPECIAL BODY WITH RADIOGRAPHY TESTING;