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介绍了一种安全可靠、操作方便的同轴式大口径蝶阀加高装置,采用有效措施减少加长杆的扭转变形,保证蝶板启闭位置和驱动装置指示位置的一致性。该产品已获国家专利(专利号:ZL201120301003.0)。
A kind of coaxial large diameter butterfly valve lifting device which is safe, reliable and easy to operate is introduced. The effective measures are taken to reduce the torsional deformation of the extension rod and ensure the consistency between the open position and the closed position of the driving device. The product has won the national patent (patent number: ZL201120301003.0).