| Media: | Water, Gas, Oil |
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| Driving Mode: | Electric |
| Connection Form: | Welding |
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Hard-sealed butterfly valves feature metal-to-metal sealing (e.g., stainless steel) between the disc and seat, ensuring durability in high-temperature/pressure environments (up to 600°C). They resist abrasion, corrosion, and thermal shock, ideal for harsh industries like petrochemicals. Multi-layer hard seals combine a metal core with flexible graphite or PTFE layers, enhancing tightness by compensating for surface irregularities. This hybrid design offers bubble-tight shutoff, reduced leakage, and adaptability to fluctuating pressures/temperatures. Both types excel in low-maintenance, long-cycle applications but differ in sealing precision: multi-layer suits dynamic conditions, while hard-sealed valves prioritize extreme durability. Common uses include power plants, chemical processing, and steam systems.
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