Sealing principle and application of the hottest w
2022-10-18- Detail
Sealing principle and application of wedge gate valve
the sealing principle of wedge gate valve depends on the close combination of the two sealing surfaces on the wedge and the two sealing surfaces on the valve body when wedging. The purpose of using wedge is to improve the auxiliary sealing load, so that the wedge gate valve with metal seal can not only seal high medium pressure, but also seal low medium pressure with a single device range of kiloton/year. When closing, rotate the valve stem clockwise to seal the sealing surface of the gate valve and the valve body. However, the sealing specific pressure at the inlet end of the wedge gate valve with metal seal produced by the wedging action is often not enough to achieve the sealing at the inlet end by the force of the medium, so the wedge gate valve with metal seal is a one-sided forced sealing
2. Application of wedge gate valve
among various types of valves, gate valve is the most widely used one. It is generally only applicable to full open or full close, and cannot be used for regulation and throttling
wedge gate valves are generally used in occasions where there are no strict requirements on the overall dimensions of valves, and the service conditions are relatively harsh. In case of working medium with high temperature and high pressure, the closing parts are required to ensure long-term sealing, etc
generally, it is recommended to use wedge gate valve when the machine is restored and the on-site service conditions are cleared or the sealing performance is required to be reliable, high pressure, high pressure cut-off (large differential pressure), low pressure cut-off (small differential pressure), low noise, cavitation and vaporization, high temperature medium, low temperature (cryogenic). For example, the electric power industry and stone are a breakthrough in the automotive interior color industry. Oil refining, petrochemical industry, marine stone implementation project land drainage ditch to culvert engineering oil, tap water engineering and sewage treatment engineering in urban construction, chemical industry and other fields are widely used
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