Hard-sealed gate valves use stainless steel, brass and other metal materials, which are sealed between metals, resistant to high temperature, wear and good mechanical properties, but relatively poor sealing performance.
Hard-sealed gate valves use stainless steel, brass and other metal materials, which are sealed between metals, resistant to high temperature, wear and good mechanical properties, but relatively poor sealing performance.
Soft-sealed gate valves usually use elastic non-metallic materials such as rubber or polytetrafluoroethylene, which have good sealing effects, but are not resistant to high temperatures, easy to wear and have poor mechanical properties.
Hard-sealed gate valves are precisely processed with valve seat materials to ensure the accuracy of matching with the valve core.
The structures and mechanisms of different types of valves vary greatly. For example, the stop valve opens and closes by moving the valve disc along the center line of the valve seat, and the ball valve opens and closes by rotating the ball around the axis.
Hard-sealed gate valves have low fluid resistance, are more labor-saving to open and close, the flow direction of the medium is not restricted, the shape is simple, and the structure length is short, but the sealing surface is prone to erosion and abrasion.
Soft-sealed gate valves have good sealing performance and can effectively prevent leakage, but their high temperature resistance, wear resistance and mechanical properties are not as good as hard-sealed gate valves.
The stop valve has a good shut-off function and is suitable for occasions with low requirements for flow regulation but high requirements for sealing performance.
Hard-sealed gate valves are often used in harsh working conditions such as high temperature, high pressure, and high wear, such as petroleum, chemical, metallurgy, and electric power industries.
Soft-sealed gate valves are suitable for occasions with high sealing requirements and low medium temperature, such as urban water supply and drainage systems.
Stop valves are widely used in various pipeline systems, such as water supply and drainage, chemical, petroleum, etc., to cut off or adjust the medium flow.