Swing Check Valves Flanged Joint Ends,
        Rubber Seal / Metal Seal 250PSI/300PSI

        Introduction
        Usage: It can prevent the water from flowing backward.
        Standard:             MSS SP-136
        Connection Ends:      Flange - ASME B16.1
        Inspection Pressure:  250PSI: Shell: 500PSI Seal: 250PSI
                              300PSI:  Shell: 600PSI Seal: 300PSI
        Surface:              Coating: Akzo Nobel Fusion Bonded Epoxy 
                              Coating with thickness 150-500um, Complies
                              with ANSI/AWWA C550
        Applications:         Potable water, water supply and drainage, 
                              sewage disposal, irrigation air condition 
                              and fire protection pipe system etc.