b'CHECK VALVES - SCREWED & WELD ENDSCREWED & WELD END CHECK VALVES800 TO 2690 CLASSBOLTED & WELDED BONNETPiston check Y-Piston check654321Ball check Swing check137 12111098FEATURES MATERIALSConstruction -API602, BS5352 & ANSI/ASME B16.34End Connections -Socket Weld: ANSI/ASME B16.11 No. Part NameThread: ANSI/ASME B1.20.1 1BodyButt Weld: ANSI/ASME B16.25 2DiscInspection & Test-API 598 / BS5146 3Gasket4Bonnet5BonnetBolt6NamePlate7Ball8SeatDisc9Disc10RetainingRing11HingeBolted CoverBolted CoverWelded Cover12HingePin(SpiralWoundType) (RingTypeJoint) (FullPenetrationWelding) 13Support16 AUSTRALIAN PIPELINE VALVE'