A flat gate valve is a sliding valve that closes a parallel gate. The closure may be a single shutter or a double shutter with a distraction mechanism in between. The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the floating gate or the floating valve seat. If it is a double gate plate gate valve, then the two gates to see the distraction agencies can add this pressure. Flat gate valve features 1, the seat with O-ring seal and preload force applied to the floating valve seat structure, so that the two-way flat gate valve import and export seal; and the structure of the opening and closing torque is only ordinary valve 1/2, to reach Easy to open and close the valve 2, at full open, the channel is smooth to a straight line, the flow resistance coefficient is minimal, no pressure loss, can be used to clean the hair ball line 3, with self-sealing packing structure, without frequent adjustment, Off extremely light, and reliable sealing, stuffing box is equipped with an auxiliary seal grease injection structure, the sealing performance is absolutely reliable, truly zero leakage; Solve the general valve packing at the most easy to leak the shortcomings 4, the plate gate valve automatically closed Remove the high pressure cavity to ensure safe use 5, fully enclosed structure, good protective performance, can adapt to weather requirements Flange plate valve is connected to the flange plate valve, this connection is the most common. Flange plate valve used in the pipeline is stable and reliable, so Shanghai Star Valve Manufacturing Co., Ltd. recommended that high-pressure pipe should be used in flange plate valve. Butt plate gate valve can be divided into wedge type and parallel type according to sealing surface configuration. Wedge type can be divided into single gate type, double gate type and elastic gate type. Parallel type can be divided into single gate type and double gate type. Divided by the thread position of the stem can be divided into two kinds of bright rod and dark rod. Butt Welded Plate Valve Features 1. Fluid resistance is small, the sealing surface of the media by the brush and erosion of small. 2. Opening and closing more effort. 3. Medium flow unrestricted, non-interference flow, does not reduce the pressure 4. Simple body, short structure length, good manufacturing process, wide range of application Flanged flatbed gate valve welding features 1. Welded flange plate gate seat seal The structure should be elastic pre-tightening force, sealing structure at the same time downstream sealing seat. Seat and seal are always face-to-face seals 2. The seat has a self-cleaning function and is protected from direct air flow during valve opening or closing. Seat should be made of lubricated, non-abrasive material. 3. Valve actuator failure does not affect the rest of the valve, maintenance and replacement work can be carried out without removing the valve. Welded flange plate gate valve at full open, the channel is smooth and straight, the flow resistance coefficient is minimal, no pressure loss, can be used to clean the pipe ball shut-off valve with self-sealing padding structure, without frequent adjustment, on, off Extremely lightweight and reliable sealing, the packing box is equipped with an auxiliary seal grease injection structure, the sealing performance is absolutely reliable, truly zero leakage; Solve the common valve packing at the most easy to leak the drawbacks Keywords: Gate valve