The sealing principle of the wedge gate valve and the applicable occasion
Sealing principle of wedge gate valve
The sealing principle of the wedge gate valve is achieved by the tight combination of the two sealing faces on the wedge gate and the two sealing faces on the valve body when wedged. The purpose of the wedge gate is to increase the auxiliary seal load so that the metal-sealed wedge gate valve seals both high and low media pressures. When closing, turn the valve stem clockwise to make the sealing surface of the gate valve and the sealing surface of the valve body close to each other to seal. However, the metal-sealed wedge gate valve is weaker than the pressure exerted by the medium at the inlet end of the wedge-type gate valve. Therefore, the metal-sealed wedge gate valve is a one-sided forced seal.
Where the wedge gate valve is applied
Among the various types of valves, the gate valve is a widely used one. It is generally only suitable for full or full closure and cannot be used for adjustment and throttling.
Wedge gate valves are generally used in applications where the dimensions of the valve are not critical and the conditions of use are harsh. For high temperature and high pressure working media, it is required to ensure that the closing parts are sealed for a long time.
Generally, it is recommended to use conditions or require reliable sealing performance, high pressure, high pressure cutoff (large differential pressure), low pressure cutoff (small differential pressure), low noise, cavitation and vaporization, high temperature medium, low temperature (deep cold). Wedge gate valve. Such as power industry, petroleum refining, petrochemical, offshore oil, urban water supply engineering and sewage treatment engineering, chemical and other fields.
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