working princel:The gate valve is plug-shaped pieces of the valve, seal leaving it flat or cone, the fluid along the centerline of the valve in a straight line. Stem form of exercise with lifting rod (stem lift, hand wheel is not lifting), but also lift rotating rod (with hand wheel and stem spin down, the nut in the valve body). Valve is only applicable to fully open and fully closed, does not allow for adjustment and throttle. Valve is forced closed valve, so the valve is closed, the valve must exert pressure to force the sealing surface does not leak.

Note:1, the hand wheel, lever operated valves can be installed in any position in the pipeline.
2, hand wheels, handles and Wei moving body does not allow for lifting purposes.
3, the flow of media should be consistent with the direction of the arrow shown in the valve body.