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Electric gate valve

by:Sino Valves     2021-03-01
Detailed introduction of electric gate valve    electric gate valve is a valve whose gate and seat are always in close contact and sealing. The opening and closing part of the electric flapper valve is a gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The electric flapper valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces. The two sealing surfaces of the more commonly used model gate valves form a wedge, and the wedge angle varies with valve parameters. The sealing surface in the gate valve moves in the vertical direction relative to the gas flow path to achieve air flow sealing, and its structure is similar to the gate of a reservoir. Since the sealing surface is flat, in order to withstand atmospheric pressure, the overall structure is relatively thick and bulky. The sliding part inside the gate valve is linearly driven in ultra-high vacuum through a welded bellows, and the seal is mostly fluorine rubber ring. For the sealing of the gate valve body, considering the high temperature baking, the metal wire is used for sealing. The opening and closing part of the electric gate valve is a gate. The movement direction of the gate is perpendicular to the direction of the fluid. The electric gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used model gate valve form a wedge, and the wedge angle varies with valve parameters. Principle: There is a round opening with a diameter on the gate, and the opening and closing of the gate makes the round opening on the gate completely separate and coincide with the diameter. The key of electric gate valve is composed of gate valve and electric electric actuator. Denso uses electric electric actuator. The output shaft adopts the valve stem nut type connection method, which takes over the flange size and pushes the valve stem to exercise left and right. In turn, the drive valve stem pushes the gate plate to move up and down at a uniform speed to move the electric gate valve beyond the purpose of opening and closing the gate valve. The advantages of the electric gate valve have a full-diameter channel, which is equivalent to a smooth pipeline, large flow capacity, small flow resistance; dual upstream and downstream seals, sealing parts without lubrication, good sealing performance, high reliability; less Parts; novel design, which not only meets the process requirements of the pipeline, but also meets the user's requirements for simplicity of operation and maintenance, and can ensure the long-term reliable operation of the valve. The electric gate valve is a flat gate valve with a diversion hole, and its flow characteristics are equivalent to the same specifications of the pipeline, showing equal percentage characteristics. A flat gate valve without a diversion hole has a smaller center cavity span than a wedge gate valve. The pressure loss of a regular cylinder is larger than that with a diversion hole, and other characteristics are basically similar. The flow regulation characteristic of flat gate valve without diversion hole adjustment is better than that of ordinary flat gate valve without diversion hole. The common specifications of electric plug-in valve are from DN25 to 1000mm. Commonly used nominal pressure is PN1.6~15.0MPa, and some product series use PN25.0MPa and 42.0MPa. Handwheel operation can be applied to DN25~600mm, bevel gear operation is generally applied to DN80~600mm, and other driving devices such as pneumatic, hydraulic and electric (explosion-proof) can be applied to valves of any specification. The liftable ram sealing surface can scrape off the adhesive on the sealing surface and automatically remove debris. The overall stainless steel material can prevent corrosion damage. The short structure length can save materials and installation space, and also effectively support the strength of the pipeline. The scientific upper seal stuffing box design makes the upper seal safe, effective and durable. The triangular bracket saves raw materials and ensures the required mechanical properties. The body stiffener design improves the strength of the valve body. The valve stem of the electric gate valve is durable, and the double-headed screw is opened and closed more quickly. The advantage is that the valve body has no grooves, the medium will not be blocked, and it has the characteristics of full-diameter flow. Its sealing structure can be divided into soft seals. , Hard seal structure. The manual plug-in valve has the characteristics of precise structure, good manufacturability, compact structure, etc. The sealed valve seat is designed with a movable structure, with anti-wear and automatic compensation functions, so it has a longer life. In the process of closing and opening, the valve seat and the gate keep moving closely, which makes the valve opening and closing force stable and has the characteristics of cutting off the medium. Manual flapper valves are generally used in building materials, metallurgy, chemical, electrical and other industries. They are used as ash hopper unloading devices of various dust removal equipment and feeding and unloading devices of various mills, dryers, silos and other equipment to prevent wildfires. The wind blows in. Related knowledge: electric valve
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