About Product:Bottom valve by the body, cover, disc, seal ring and gasket components, the Bottom valve disc has a single valve, Double valve and multi-valve and other types. After the bottom valve is connected to the pipeline, the liquid medium enters the body from the direction of the bonnet, The pressure of the liquid ACTS on the disc, so that the disc is the opened to allow the flow of the medium, the when the pressure of the medium in the valve body changes or disappears, The disc is closed to prevent the reverse flow of the medium. The Fine iron halter bottom valve, large amount of water, large diameter, not rust, durable, anticorrosive, rustproof, delicate appearance, Fashion, electrostatic spray! Complete specifications, large quantity with you!