Core features (determined by hard sealing structure)

High temperature resistance: The hard alloy sealing surface can maintain strength and sealing performance at high temperatures (usually above 425 ° C, with special designs reaching 650 ° C or even higher), avoiding melting or burning of soft sealing materials.
*Wear resistance: Its extremely high hardness enables it to resist the erosion and wear of solid particles, dust, coal powder, ash, crystals, etc.
*Corrosion resistance: Hard alloys usually have good corrosion resistance (especially metallic hard alloys) and can be used in corrosive media.
** * Long lifespan: * * Under harsh working conditions, it significantly extends the lifespan of soft sealed gate valves and has longer maintenance intervals.
*Tight sealing: Although the absolute sealing performance may be slightly inferior to high-quality soft seals (in clean fluids), it can still achieve a very high sealing level (such as ANSI Class VI/ISO 5208 Class B) through precision grinding and matching, meeting the cutting requirements of most harsh working conditions. **Good sealing stability under high temperature and high pressure.
*Anti scratch: Hard to hard contact avoids the problem of permanent damage caused by the soft seal being easily embedded by hard objects or particles.