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Flat gate valve features: 1. Sealing structure of the valve seat should be elastic pre-tightening, upstream and downstream sealing seat seal structure at the same time. Seat and seal are always face-to-face seals. 2. Seat has a self-cleaning function, and the valve is opened or closed during the direct flow of air erosion. 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. (1) Yoke Sleeve: Aluminum bronze yoke sleeve is equipped with a needle thrust bearing to minimize operating torque. (2) stem: thread length up to the bracket; pin and spot welding; with stability. (3) Pressure Seal: Simple construction with segmented retaining ring and silver-plated mild steel washers to help disassemble and achieve the best bonnet seal. (4) seat ring: welded seat ring perpendicular to the flow channel, easy to maintain. (5) Actuators: These valves can be equipped with electric, hydraulic or pneumatic actuators. DN300 following the standard configuration handwheel, DN350 above configuration helical gear operating mechanism. (6) Yoke: The fully assembled yoke passes the seismic test for easy maintenance and installation of the actuator. (7) Gland: Two-piece, self-adjusting gland to avoid being ejected. (8) overall rear seat: hard surface, the longest service life. (9) Flap: The spring-loaded flap regulates itself to reduce the torque requirements of the actuator. (10) the overall stop: the overall casting bracket stop device, positioning the assembly of the bracket valve, making the valve seat more stable and reliable. 4. Body casting and welding two structures. 5. The valve seat adopts O-ring seal and pre-tightening floating seat structure to seal the valve inlet and outlet in both directions; and the opening and closing moment of the structure is only 1/2 of the normal valve, which can be easily opened and closed valve. 6. Metal to metal seal valve, the valve body is equipped with a grease structure, grease through the grease device, the valve seat into the valve sealing surface, the valve to zero leakage. 7. Seat with PTFE seal on the sealing surface, with PTFE pairs of metal and metal to metal seal, PTFE sealing surface at the same time remove the role of the dirt gate. 8 gate, valve seat by a special process, spray welding cemented carbide, wear PTFE, to achieve double seal. And grease-assisted double seal oil seal, seal more reliable, longer service life. 9. Diversion gate 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. 10. When the valve is fully open, the passage is smooth and straight, the flow resistance coefficient is very small, no pressure loss, can pass the hair ball to clean the pipeline. 11. The valve adopts self-sealing packing structure, without frequent adjustment, open and close extremely light, and reliable sealing, stuffing box with auxiliary sealing grease injection structure, the sealing performance is absolutely reliable, truly zero leakage; solve General valve packing at the most easy to leak the ills. 12. When the valve is closed, it can automatically remove the high pressure in the cavity to ensure safe operation. 13. Fully enclosed structure, protective performance, can adapt to all-weather requirements. 14. The valve has a rod or observation window to indicate the opening and closing of the valve. Flat gate valve purposes: flat gate valve for natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other pipeline, venting system and steam storage device, used as hoist equipment. Z43 single gate with diversion gate plate valve for natural gas extraction and purification of long-distance pipeline. Flat gate valve Diameter range: DN25 ~ 1200 Pressure range: 0.6MPa ~ 45MPa 150Lb ~ 3000Lb Diversion orifice plate gate valve for the need for the ball through the pipeline, no diversion hole for the pipe does not require the ball through the pipe.