Hard sealed gate valve

Hard sealed gate valve refers to a gate valve made of metal materials (body seal or alloy steel butt welding, hard alloy butt welding) for both the valve seat and gate sealing surface. Its sealing relies on the rigid contact of high-precision matching between metal sealing pairs, representing the high-performance and high reliability direction of gate valves. Compared with soft sealed gate valves, the core advantage of hard sealed gate valves lies in their excellent durability: they can withstand higher temperatures and pressures, are less prone to wear, have stronger adaptability to media containing particles, impurities, or erosive properties, and have a longer service life. Although its sealing level usually meets national standards on the basis of double-sided sealing, the difficulty of achieving zero leakage is higher than that of elastic sealing. According to structural optimization, modern hard seal gate valves often adopt designs such as elastic gate plates or parallel double gate plates, using medium pressure to assist in sealing, in order to improve sealing effect and reduce operating torque. The hard seal gate valve produced by Kaiweixi Valve is a key cutting equipment in harsh industrial environments such as petroleum, natural gas, chemical, power plants, and high-temperature and high-pressure steam pipelines. It is suitable for water, steam, oil products, and various corrosive media.