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Stop valve series

High pressure electric stop valve

Label: high pressure electric stop valve added time: May 25, 2021 click 69 second

 High pressure electric stop valve

High pressure stop valve The opening and closing parts of the valve disc are plug-shaped, and the sealing surface is flat or conical. The valve disc moves in a straight line along the center line of the fluid. Movement shape of valve stem
There are lifting rod type (valve rod lifting, hand wheel not lifting), and lifting rotating rod type (hand wheel and valve stem rotate together, nut is set on valve body). The globe valve is only suitable for full opening and full closing, and adjustment and throttling are not allowed. Well known domestic manufacturers are Shanghai quangong valve equipment Co., Ltd. and Hunan Xinxing Hydropower Equipment Co., Ltd. The company is the Ministry of machinery industry, the Ministry of chemical industry, China National Chemical Equipment Corporation fixed-point management production enterprises. Its products have certain price advantages and technical advantages in the industry.
High pressure stop valve belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from the lower part of the valve disc, the resistance to be overcome by the operating force is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than that to open the valve, so the diameter of the valve stem should be larger, otherwise the valve stem will be bent. In recent years, since the appearance of self sealing valve, the medium flow direction of the stop valve changes from the top of the valve disc into the valve chamber. Under the action of medium pressure, the force to close the valve is small, but the force to open the valve is large, so the diameter of the valve stem can be reduced accordingly. At the same time, under the action of medium, this type of valve is also more tight. China's valve "three to" once stipulated that the flow direction of stop valve should be from top to bottom.
high pressure Globe valve When opening, when the opening height of the disc is 25% - 30% of the nominal diameter, the flow rate has reached the maximum, indicating that the valve has reached the full open position. Therefore, the full open position of the stop valve should be determined by the stroke of the disc.
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