硬密封蝶阀

**产品概述**

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 **主要特点**

1. Core Bi-directional Metal Seal System, Forward & Reverse Equal Pressure Zero Leakage

   完全聚焦于 bi-directional sealing, it solves the one-way sealing limitation of conventional butterfly valves from the structural root:

   1. Adopting symmetrical bi-directional elastic metal seat structure, different from ordinary one-way seal seats, no matter the medium flows from forward or reverse direction, the medium pressure can push the seat to closely fit the disc sealing surface, realizing bi-directional self-energized sealing — the higher the pressure, the tighter the seal. The forward and reverse pressure bearing capacity is completely consistent, both can reach the full nominal pressure grade, no one-way pressure bearing short board;
      

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   2. The metal seal pair adopts plasma spray welding 司太立硬质合金、超音速喷涂碳化钨 process. Both forward and reverse sealing surfaces are precisely ground and paired, with surface hardness up to HRC40-65, excellent high temperature resistance, erosion resistance, anti-seizure and particle wear resistance. Perfectly suitable for severe wear conditions such as high temperature steam and media containing solid particles, the synchronous wear resistance of bi-directional sealing surfaces makes the service life more than 6 times that of ordinary one-way seal butterfly valves;
      

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   3. The bi-directional sealing performance reaches ANSI/FCI 70-2 Class V zero leakage, which can automatically compensate for thermal expansion and contraction under high and low temperature working conditions, avoiding high temperature jamming and forward & reverse seal failure. It completely solves the industry pain points of conventional butterfly valves such as reverse pressure leakage and inability to adapt to bidirectional flow pipelines.
      

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2. 3D 三偏心 无摩擦结构，低扭矩操作与长循环寿命

   优化的三维偏心 三偏心 design (shaft eccentricity, disc eccentricity, sealing cone eccentricity) ensures the metal seat and disc sealing surface only contact at the moment of full closing, and completely separate after opening, no sliding friction during the whole stroke. It completely avoids wear of the bi-directional sealing surfaces caused by frequent opening and closing, with operating torque over 60% lower than ordinary concentric butterfly valves, and cycle life more than 10,000 times, ideal for frequent operation and bidirectional flow switching conditions.

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3. High-Strength Valve Body Structure, High Pressure Bearing & Wide Adaptability

   阀体采用一体式精密铸造，壁厚均匀，结构刚性强，压力等级覆盖 PN16-PN100（Class150-Class600）。可选法兰式及对夹式连接，结构长度符合 API 609 及 GB/T 12221，完美兼容 GB、ANSI、JIS、DIN 标准法兰。核心部件可选 WCB 碳钢、304/316 不锈钢、双相钢、WC6 铬钼钢等，具备优异的耐酸碱及氯化物腐蚀性能，适用于各类腐蚀性介质工况。.

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4. Full Drive Compatibility & Complete Safety Protection, Stable & Reliable

   Reserved ISO 5211 standard mounting pad for direct connection with lever handle, worm gear, pneumatic/electric actuators, suitable for local manual operation and remote automatic control. Standard anti-static device, blow-out proof stem, high temperature flexible graphite packing seal, optional API 607 fire-safe structure, which can still maintain effective bi-directional metal seal under fire conditions, ensuring the safe operation of the pipeline in all aspects.

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**应用领域**

产品概述

This Bi-directional Metal Sealed Butterfly Valve firmly focuses on the core advantage of forward and reverse equal pressure metal seal, matched with triple offset friction-free opening and closing structure. It features bi-directional zero leakage, high temperature and erosion resistance, long service life, high pressure and corrosion resistance, which completely solves the industry pain points of conventional one-way seal butterfly valves such as reverse pressure leakage and inability to adapt to bidirectional flow conditions.

Covering full diameter sizes and strictly complying with global industrial valve standards, it is compatible with manual and all types of automatic drive modes. It is the preferred special valve for pipeline on-off and flow regulation under harsh working conditions of bidirectional flow and bidirectional pressure bearing.