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The characteristics and applications of flat gate valve: First, the use, performance and features Flat gate valve is a member of the family of gate valve, the same as the wedge gate valve; its main function is to control the pipeline on and off, rather than regulating the pipeline Media flow. The advantages of the fluid resistance is small, hoist effort, shorter structure length, the flow of medium and other restrictions on the pipeline. The disadvantage is that the seal pair has two sealing surfaces, processing more complex, high cost, relative to other valves to be tall, opening and closing longer, open and close the relative friction between the sealing surface, easily lead to abrasions. Second, the product structure features: 1, the valve seat with a ring seal and the preload force applied to the floating valve seat structure, so that the valve import and export two-way seal; and the structure of the opening and closing torque only ordinary valve, can easily open , Close the valve. 2 The valve seat adopts inlaid or welded stainless steel (or cobalt chromium tungsten alloy) on the sealing surface, with the double seal of the metal and the metal to the metal, and the sealing surface simultaneously removes the action of the gate dirt. 3, metal to metal seal valve, the body has a grease injection structure, grease through the grease, valve seat into the valve surface, the valve to zero leakage. 4, with diversion hole valve gate, whether it is fully open or fully closed with the sealing surface is always consistent with the sealing surface is protected from direct erosion of the media, thereby extending the service life. 5, the valve is fully open, the channel is smooth for the straight line, the flow resistance coefficient is minimal, no pressure loss, can pass the hair ball cleaning pipeline. 6, The valve adopts self-sealing packing structure, without frequent adjustment, open and close extremely light, and reliable sealing, stuffing box at the auxiliary seal grease injection structure, the sealing performance is absolutely reliable, and truly achieve zero leakage; General valve packing at the most easy to leak the ills. 7, when the valve is closed, it can automatically remove the lumen high pressure (see the working principle diagram), to ensure the safe use. 8, fully enclosed structure, protective performance, can adapt to all weather requirements. 9, the valve has a rod or observation window to indicate the valve opening and closing situation. This article Keywords: gate valve