The ZF series water injecting valve are high pressure flat-plate gate valves, witha reasonable structure, a reliable seal and an easy operation and the sealing face is ouilt-up welded with carbide alloy, features anti-corrosion, anti-wear and anti-erosion and can be used for throttle, especially suitable for the water, oil, mud pulpy, natural gas pipeline as the open- close and adjusting device to control the medium flowing.