Precautions for installation of soft seal telescopic butterfly valve

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　　The soft-sealed telescopic butterfly valve is a flange-type butterfly valve and a pipe telescopic device that integrate two functions. It can not only play a throttling role, but also solve the problem of eliminating the internal force generated by the temperature difference, that is, it can play a telescopic role. As a component used to realize on-off and flow control of pipeline systems, it has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. 　　Schematic diagram of soft-sealed telescopic butterfly valve. Structural features of soft-sealed telescopic butterfly valve: 1. Small and lightweight, easy to disassemble and repair, and can be installed in any position. 　　2. The structure is simple and compact, the operating torque is small, and the 90-degree rotation opens quickly. 　　3. The flow characteristics tend to be linear and the adjustment performance is good. 　　4. The connection between the butterfly plate and the valve stem adopts a pinless structure, which overcomes possible internal leakage points. 　　5. The seals are replaceable and the sealing is reliable and achieves two-way sealing. 　　6. The butterfly plate can be spray-coated according to user requirements, such as nylon or polytetrafluoroethylene. 　　7. The valve can be designed for flange connection and clamping connection. 　　8. The driving mode can be manual, electric or pneumatic. 　　Precautions for installation of soft-sealed telescopic butterfly valves 1. It must be laid flat before installation, and must not be bumped at will. It is strictly forbidden to remove the bracket during operation; 2. The structural length of the telescopic butterfly valve is the minimum length when it leaves the factory. During installation, pull it to the installation length (that is, the design length); 3. The sealing gland of the telescopic part must be loosened before installation, and then lock the telescopic sealing gland after the valve and the pipe have reached the required length; 4. When the length of the pipes exceeds the installation length of the telescopic valve, please adjust the distance between the pipes and do not forcibly stretch the telescopic butterfly valve to avoid damaging the butterfly valve; 5. It can be installed at any time for temperature compensation. After the pipeline installation is completed, brackets must be added at both ends along the axis of the pipe to prevent the telescopic valve telescopic pipe from being pulled out.