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真空蝶阀性能几个分类
Several Classifications of Performance of Vacuum Butterfly Valve
1、按结构形式分类
1. Classification by structural form
(1)中心密封蝶阀
(1) Central Sealed Butterfly Valve
(2)单偏心密封蝶阀
(2) Single eccentric sealed butterfly valve
(3)双偏心密封蝶阀
(3) Double eccentric sealed butterfly valve
(4)三偏心密封蝶阀
(4) Tri-eccentric sealed butterfly valve
2、按密封面材质分类
2. Classification according to sealing surface material
(1)软密封蝶阀。
(1) Soft-sealed butterfly valve.
1)密封副由非金属软质材料对非金属软质材料构成。
1) The sealing pair is composed of non-metallic soft material and non-metallic soft material.
2)密封副由金属硬质材料对非金属软质材料构成。
2) The sealing pair is composed of metal hard material and non-metal soft material.
(2)金属硬密封蝶阀。密封副由金属硬质材料对金属硬质材料构成。
(2) Metal hard seal butterfly valve. The sealing pair is composed of metal hard material to metal hard material.
3、真空蝶阀按密封形式分类
3. Vacuum butterfly valves are classified according to sealing form
(1)强制密封蝶阀
(1) Forced Sealing Butterfly Valve
1)弹性密封蝶阀。密封比压由阀门关闭时阀板挤压阀座，阀座或阀板的弹性产生
1) Flexible sealing butterfly valve. Sealing specific pressure is generated by the elasticity of the disc extruding the seat, seat or disc when the valve closes.
2)外加转矩密封蝶阀。密封比压由外加于阀门轴上的转矩产生
2) Butterfly valve with external torque seal. Sealing specific pressure is generated by the torque applied to the valve shaft.
(2)充压密封蝶阀。密封比压由阀座或阀板上的弹件密封元件充压产生
(2) Pressure-filled sealing butterfly valve. Sealing specific pressure is generated by charging the elastomer sealing element on the seat or valve plate.
(3)自动密封蝶阀。密封比压由介质压力自动产生。
(3) Automatic sealing butterfly valve. Sealing specific pressure is automatically generated by medium pressure.