1.ANSI Swing Check Valve 2.Bolted Cover, Cast Steel Body, Flanged End 3.150-1500LB 4.2"-24" Description:1. Design and manufacture as per API 6D & BS18682. Face to Face Dimension conforms to ANSI B16.103. Structures: Bolted Cover, Swing Type4. Connections: Flanged End as per ASME/ANSI B16.55. Body Material: WCB, SS304, SS316...6.Pressure Rating: Class150LB, Class300LB, Class600LB, Class900LB, ...