Does It Matter How The Butterfly Valve Is Installed?

butterfly valve installation method of butterfly valve directly affects the sealing performance, service life and operation stability of butterfly valve. Incorrect installation will not only cause leakage, but also aggravate valve plate and seal wear, or even cause safety hazards. There are two common installation methods of core installation method and butterfly valves. The operation points and application scenarios of different methods vary greatly. (1) Flange connection installation This is the most commonly used installation method in industrial scene, which is secured to the pipe through the flange. Before installation, the flange sealing surface must be cleaned to ensure that there are no impurities or scratches, so as not to affect the sealing effect. Bolt tightening must follow the principle of ``even diagonally tightening valve body"to prevent valve body deformation due to uneven forces, resulting in leakage. The flange gasket shall match the material and pressure level of the valve and piping. For example, metal gaskets should be used at high temperature and rubber gaskets at low pressure. (2) Clamp-type installation: no flanges at either end of valve, fixed by direct clamp of the pipeline flange, more compact, lower cost. The parallelism and coaxial degree of the flange at both ends of the valve must be ensured. Excessive deviations can cause the disc to stick, preventing proper opening and closing.
The clamping force must be moderate. Too loose can lead to leakage and too tight can damage the seal or body of the valve.
This valve is mainly suitable for low pressure, small caliber pipes (e.g. DN50-DN300) and not for high pressure or vibration conditions.
2.General Key Installation Requirements
Either method, the following three points must be strictly observed:
Flow Direction Verification: Some butterfly valves (especially type B one-way sealed butterfly valves) have specific flow direction requirements. Arrows on the valve body must be followed. Reverse installation will directly cause the seal to fail.
Location Selection: Valves should be installed in a location convenient for operation and maintenance, avoiding heat or vibration sources. When installed in a horizontal pipe, the valve stem shall be vertically upward to prevent uneven force and fluid corrosion. Cleaning and lubrication: Before installation, the pipe should be thoroughly cleaned to prevent solder slag, rust and other impurities from entering the disc. After installation, proper lubricant shall be applied to the valve stem and other moving parts to ensure smooth operation.
If you need installation guidance for specific situations, would you like me to create a step-by-step list for butterfly valve flange connection installation? You can follow the steps directly to avoid missing any key steps.