The open and close parts of the high-temperature and high-pressure shut-off valves are plug-shaped flaps. The sealing surface is flat or tapered, and the flap moves linearly along the centerline of the fluid. The valve stem is in the form of a lift rod-type valve stem, which does not move up or down, but also has a lifting and rotating rod type. The hand wheel rotates with the valve stem, and the nut is provided on the valve body. Suitable for water, steam, oil pipelines, with high temperature, high pressure characteristics. It can be used to cut off or connect the medium on high temperature and high pressure water, metallurgy and other high temperature and high pressure water, steam, oil and superheated steam pipes in thermal power plants, petrochemicals, metallurgy, etc. The valve and pipeline connection adopts welded structure, the sealing surface is not easy to wear, scratches, good sealing performance, long life, compact structure, good opening and closing, small height, and convenient maintenance. Applicable to water, steam, oil pipelines, with high temperature, high pressure characteristics.
The handwheel and handle operated bevel stop valve can be installed at any position of the pipeline. The handwheel, handle and vignetting mechanism are not allowed to be lifted. The flow direction of the medium should be consistent with the arrow direction shown by the valve body. High-temperature and high-pressure shut-off valve, also called sectional door, is the most widely used type of valve. Its popularity is due to the small friction between the sealing surfaces in the opening and closing process. It is relatively durable, and its opening height is not large, making it easy to manufacture. Easy maintenance, not only for medium and low pressure, but also for high pressure. Its closing principle is that relying on the pressure of the valve rod, the sealing surface of the valve flap and the sealing surface of the valve seat are closely fitted to prevent the medium from flowing. Insulation shut-off valve can only allow media to flow in one direction and has directionality when installed. Its structure length is larger than the gate valve, and the fluid resistance is large. In long-term operation, the sealing reliability is strong. When the high-temperature and high-pressure shut-off valve is opened, the opening height of the valve flap is 25% to 30% of the nominal diameter, and the flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the stop valve should be determined by the stroke of the disc.
The handwheel and handle operated bevel stop valve can be installed at any position of the pipeline. The handwheel, handle and vignetting mechanism are not allowed to be lifted. The flow direction of the medium should be consistent with the arrow direction shown by the valve body. High-temperature and high-pressure shut-off valve, also called sectional door, is the most widely used type of valve. Its popularity is due to the small friction between the sealing surfaces in the opening and closing process. It is relatively durable, and its opening height is not large, making it easy to manufacture. Easy maintenance, not only for medium and low pressure, but also for high pressure. Its closing principle is that relying on the pressure of the valve rod, the sealing surface of the valve flap and the sealing surface of the valve seat are closely fitted to prevent the medium from flowing. Insulation shut-off valve can only allow media to flow in one direction and has directionality when installed. Its structure length is larger than the gate valve, and the fluid resistance is large. In long-term operation, the sealing reliability is strong. When the high-temperature and high-pressure shut-off valve is opened, the opening height of the valve flap is 25% to 30% of the nominal diameter, and the flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the stop valve should be determined by the stroke of the disc.
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