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Soft seal and hard seal are judged according to the sealing material of the valve seat. Soft seal: one side of the sealing pair is made of metal material, and the other side is made of elastic non-metallic material. This seal has good sealing performance, but it is not resistant to high temperature and abrasion, and has poor mechanical property. Hard seal: both sides of the sealing pair ...
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The plug valve is a quick opening and closing valve. Plug valves are suitable for multi-channel structures, so one valve can obtain two, three or even four different flow channels. This can simplify the design of the pipeline system, reduce the amount of valves and connecting fittings. Plug valves can be divided into soft seal and hard seal structures according to different sealing materials. 1. L...
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In the process of using the valve, we will encounter various working conditions, such as high temperature and low temperature. In this case, how should we choose the valve? 1. High Temperature Conditions When selecting valves, it is necessary to consider using shell materials and internals materials with high temperature strength, such as austenitic stainless steel valve and bidirectional sta...
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At present, the gate valves on the market have a general sealing performance, and the phenomenon of water leakage and rust is common. The soft seal gate valve overcomes this disadvantage. The soft seal gate valve achieves a good sealing effect by making use of the compensation function of the elastic wedge to produce a small amount of elastic deformation. Common Sense of Installation and Maintenan...
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The flat gate valve is characterized by small flow resistance. Since the wedge slides on two valve seat surfaces, the flat gate valve is also suitable for fluids with suspended particles. Double block discharge function: When the valve is opened or closed, the medium from upstream and downstream will not leak from the valve cavity, which is convenient for the cavity discharge and leak detection. F...
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The opening and closing part of the gate valve is the wedge, and the movement direction of the wedge is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and is not suitable for adjustment and throttling. Most gate valves are forcibly sealed, that is, when the valve is closed, the wedge must be forced against the valve seat by external force to ...
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