High temperature and high pressure stop valve, because the valve opening or closing stroke is relatively short, and has a very reliable shut-off function. This kind of stop valve makes the liquid hardly change the direction of flow. The valve stem and the passage are at a certain angle, and the valve seat sealing surface has a certain angle with the inlet and outlet passages, and the valve body can be made integral. The valve disc and the valve stem are designed as an integral structure to prevent the internal parts from rushing out of the valve body caused by the pipe and pressure fluctuations. The structure is compact and safe to use. According to high temperature and high pressure resistance, the valve body can fully withstand temperature changes and cause expansion and contraction, and the structure of the valve seat part λ will not be permanently deformed due to temperature changes. The flangeless connection method uses welding.
working principle
The opening height of the valve disc of the high temperature and high pressure globe valve is generally only 1/4 of the diameter of the valve seat passage, so it is much smaller than that of the gate valve. Usually there is only one sealing surface on the valve body and the valve disc, so the manufacturing process is relatively good and easy to maintain. The handwheel rotates in a clockwise direction, and the working medium enters from the channel under the valve disc. At this time, the applied sealing force must be equal to or greater than the sum of the necessary specific pressure generated on the sealing surface and the upward force of the medium. On the contrary, if it rotates counterclockwise, the valve flap closes the inlet and stops the medium flow.
Product Usage
The direct-flow butt-welding Y-type power station stop valve is suitable for pipes in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and electric power industries with a working temperature of -29~550ºC, to cut off or connect the medium. Applicable media are: water, oil, steam, acidic media, etc. Operation methods are: manual, gear drive, electric, pneumatic, etc.
Product structure characteristics
1. The product structure is reasonable, the seal is reliable, the performance is excellent, and the shape is beautiful.
2. The sealing surface of the valve disc and valve seat is made of cobalt-based cemented carbide, which is wear-resistant;
3. After quenching and tempering and surface nitriding treatment, the valve stem has good corrosion resistance and scratch resistance.
4. Various piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.
5. The valve body has a complete variety of materials, and the packing and gasket are reasonably selected according to actual working conditions or user requirements, which can be suitable for various pressure, temperature and medium working conditions.
6. The inverted seal is made of threaded connection seal seat or the body is welded with austenitic stainless steel. The inverted seal is reliable. The replacement and maintenance of the packing can be carried out without stopping the machine, which is convenient and quick without affecting the operation of the
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