China Cast Steel Swing Check Valve: Swing Type Disc Check Valves, 16 Inch, 2500LB, Bolted, Pressure Seal Cover, WC6, WC9, C5 Cast Steel, Flanged End. Features: Bolted Bonnet/Pressure Seal Bonnet. Swing Type Disc. 4" & Larger With Eye Bolt. By Pass On Request. Specifications: Design: ASME B16.34/BS 1868. Face to Face: ASME B16.10. End to End: ASME B16.10. End Flange: ASME B16.5. BW End: ASME B16.25. Test: API 598. Special: NACE MR-01-75. Pressure: 2500LB. Size Range: 16". Material Available: WCB, WCC, LCB, LCC, WC6, WC9, C5.