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(法兰，对夹)气动硬密封蝶阀采用三偏心多层次金属密封结构,无机械磨损，可达到零泄漏，有优良的双向密封功能,是用于石油、化工、冶金、电力、食品、医药、给排水、气体输送等不同介质的管路上作调节流量、截断或接通流体的理想装置The imported pneumatic hard sealing butterfly valve (flange, clamp) adopts a three eccentric multi-level metal sealing structure, without mechanical wear, can achieve zero leakage, and has excellent bidirectional sealing function. It is the best device for regulating flow, cutting off or connecting fluids on pipelines with different media such as petroleum, chemical, metallurgy, power, food, medicine, water supply and drainage, and gas transportation
进口气动硬密封蝶阀产品详情 Product details
(法兰，对夹)气动硬密封蝶阀采用三偏心原理结构，阀座与碟板在启闭时几乎无摩擦，密封是采用软硬金属片层叠组成，具有金属密封和弹性密封的双重优点，无论在低温和高温情况下，均具有优良的密封特性 RETZ (Flange, wafer) The imported pneumatic hard seal butterfly valve adopts the three eccentric principle structure. The valve seat and disc plate almost have no friction when opening and closing. The seal is composed of soft and hard metal sheets, which has the dual advantages of metal seal and elastic seal. It has excellent sealing characteristics no matter in low temperature or high temperature
进口气动硬密封蝶阀结构特点 Structural characteristics
三偏心结构：阀杆轴线与蝶板密封面间偏置一个尺寸A，并与阀体通道轴线偏置一个尺寸B，阀座回转轴线与阀体通道轴线形成一个偏心角α，故形成三偏心。蝶阀从0°～90°开启时，蝶板密封面会在开启的瞬间立即脱离阀座密封面，在其90°～0°关闭时，只有在关闭的瞬间，其蝶板圆锥形密封面才会接触并压紧阀座圆锥形密封。所以阀座与蝶板上的密封面之间无任何摩擦，去除了磨损和泄漏的可能性 Three eccentric structure: one dimension A is offset between the valve stem axis and the sealing surface of the butterfly plate, and one dimension B is offset from the valve body passage axis. The rotation axis of the valve seat forms an eccentric angle with the valve body passage axis α， Therefore, three eccentricities are formed. When the butterfly valve is opened from 0 ° to 90 °, the sealing surface of the butterfly plate will immediately disengage from the sealing surface of the valve seat at the moment of opening. When the butterfly valve is closed from 90 ° to 0 °, the conical sealing surface of the butterfly plate will contact and compress the conical sealing surface of the valve seat only at the moment of closing. Therefore, there is no friction between the valve seat and the sealing surface on the butterfly plate, eliminating the possibility of wear and leakage.
扭矩密封：三偏心的结构使蝶阀关闭时，其密封副两密封面之间的密封比压由外加于阀杆的驱动力矩产生。不仅消除了常规弹性进口气动硬密封蝶阀3.jpg阀座弹性材料老化、冷流、弹性失效等因素造成的密封比压降低和消失，而且可以通过外加驱动力矩的改变，实现对其密封比压的任意调整，从而使三偏心蝶阀的密封性能改善，蝶阀的使用寿命也大大提高 Torque sealing: when the butterfly valve is closed due to the tri eccentric structure, the sealing specific pressure between the two sealing surfaces of the sealing pair is generated by the driving torque applied to the valve stem. It not only eliminates the reduction and disappearance of sealing specific pressure caused by aging of elastic materials, cold flow, elastic failure and other factors of conventional elastic valve seats, but also realizes the arbitrary adjustment of sealing specific pressure through the change of external driving torque, thus improving the sealing performance of triple eccentric butterfly valves and greatly increasing the service life of butterfly valves.
软硬层叠式金属密封结构：蝶板密封圈采用软硬层叠式不锈钢片和柔性石墨板的密封面，使其具有金属硬密封和弹性密封的双重优点，无论在低温和高温工况下均具有优良的密封性能 Soft and hard laminated metal sealing structure: the butterfly plate sealing ring adopts the sealing surface of soft and hard laminated stainless steel sheet and flexible graphite plate, which makes it have the dual advantages of metal hard sealing and elastic sealing, and has excellent sealing performance no matter under low temperature or high temperature conditions
双向密封：因密封面锥角小于密封材料的磨擦角，蝶板关到密封位置时立即实现自锁，并能承受一定的反向压力冲击 Two way sealing: since the cone angle of the sealing face is less than the friction angle of the sealing material, the butterfly plate will automatically lock when it is closed to the sealing position and can withstand a certain reverse pressure impact
防火结构：全金属结构本身具有火灾安全的特性 Fireproof structure: the all metal structure itself has the characteristics of fire safety
密封圈：密封圈由压板夹在蝶板上，易于安装、调节和更换 Sealing ring: the sealing ring is clamped on the butterfly plate by pressing plate, which is easy to install, adjust and replace
阀杆的上、下部位装有轴套，防止磨损和粘连，提高了使用寿命 The upper and lower parts of the valve stem are equipped with