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SECURITY VALVE; INLET DIAMETER: 3 "; MAXIMUM WORKING PRESSURE OF 8 BAR; CALIBRATION PRESSURE: 8.4 KG/CM2 INLET MEASUREMENT: 3" 150# FLANGED OUTLET MEASUREMENT: 4" FLANGED 150# CARBON STEEL BONNET AND PLUG WITH STAINLESS STEEL INTERNALS DISCHARGE AREA INCH2: 2,853 API STANDARD - BUNA-N TYPE SEAL