@lisa_9.9.9: Pneumatic flat gate valve， Flat gate valves are a common type of gate valve, primarily used to cut off the flow of media in pipelines. They are widely used in material conveying systems in industries such as petroleum, chemical, power, and food processing due to their simple structure, good sealing performance, and easy opening and closing. I. Structural Features of Flat Gate Valves 1. Valve Body Structure: • Generally an integral cast or welded structure with a straight internal flow channel and low flow resistance; • Guide grooves are provided on both sides of the valve body to facilitate the up-and-down opening and closing of the valve plate. 2. Valve Plate (Gate): • Flat shape, moving linearly during opening and closing; • Single or double gate structures can be used; • The sealing surface can be overlaid with wear-resistant alloy or rubber seals. 3. Sealing Structure: • Achieved through a surface seal between the valve plate and the valve seat; • Double gate structures usually have a spring compensation device to ensure a tight seal. 4. Drive Method: • Can be driven manually, electrically, pneumatically, or hydraulically; • Electric or pneumatic actuators are often used in large-diameter applications or applications requiring frequent opening and closing. II. Working Principle of Flat Gate Valve The flat gate valve moves the valve stem up and down by rotating the handwheel (or actuator), causing the flat valve plate to rise and fall vertically within the valve body guide: • When opening: The valve plate rises, allowing fluid to flow directly through the channel; • When closing: The valve plate descends, pressing tightly against the valve seat to achieve a seal. This straight-through structure has almost no flow resistance, making it suitable for long-distance pipeline transportation. ⸻ III. Application Conditions of Flat Gate Valve 1. Powder and Granular Material Conveying Systems: • Used in pipelines for dry materials such as cement, lime powder, coffee powder, grain powder, and coal powder; • Often used in conjunction with screw conveyors, bucket elevators, and dust collectors. 2. Liquid or Gas Pipelines: • Cut-off control of media such as oil, natural gas, steam, and water; • Suitable for high-pressure, large-diameter applications. 3. Food and Chemical Industries: • Stainless steel flat gate valves are commonly used in clean environments such as food processing, pharmaceuticals, and coffee production; • Features corrosion resistance and anti-clogging properties. IV. Main Advantages of Flat Gate Valves • Straight-through fluid passage, low flow resistance; • Quick opening and closing, good sealing performance; • Compact structure, small installation space; • Easy maintenance, long service life. V. Common Specifications of Flat Gate Valves Item | Parameter Range Nominal Diameter | DN50～DN800 (customizable) Working Pressure | 0.1～2.5 MPa Applicable Temperature | ≤250℃ (depending on sealing material) Material | Carbon steel, stainless steel, cast iron, aluminum alloy, etc. Actuation Method | Manual, electric, pneumatic ##Flatgatevalve#gatevalvepneumaticflatgatevalve

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Tuesday 11 November 2025 09:11:49 GMT