A Hard Seal Control Valve is a type of valve where both sides of the sealing pair are made from metal materials or other high-hardness materials. This design provides the valve with high temperature resistance, abrasion resistance, and superior mechanical properties compared to soft seal valves. However, hard seal valves typically offer poorer sealing performance.
The materials used in hard seal valves can include combinations such as steel with steel, steel with copper, steel with graphite, and steel with alloy steel. The steel components can be made from cast iron, cast steel, alloy steel, bead welding alloy, or spraying alloy. These valves are ideal for applications where durability and resistance to harsh conditions are more critical than achieving a perfect seal.
