FAQ
Installation, Use, and Maintenance of Butterfly Valves
1. Before installation, check whether the specifications, pressure, temperature, and corrosion resistance of the butterfly valve meet the usage requirements. Inspect all parts for damage or looseness.
2. This butterfly valve can be installed on pipes at any angle, preferably in a closed position; when welding the pipe flange, cover the valve sealing surface with a plate to prevent particles and debris from damaging the sealing surface. After welding, remove the valve, clean the sealing surface and the inner cavity of the pipe, and then install and secure the valve.
3. During installation, pay attention to the pressure direction when the valve is in the closed state.
4. Before installation, thoroughly clean the sealing surfaces (both ends, butterfly plate sealing surface, and valve seat sealing surface) to remove dust and dirt.
5. Before installation, perform a trial operation of the butterfly valve; it should open and close smoothly, and the open/close position should match the pointer position. Manual operation: clockwise to close, counterclockwise to open; do not apply additional force once the pointer is in position.
7. When conducting pressure tests on the valve, do not use a single flange for installation and pressure testing; double flanges must be used. When tightening bolts, do so in a symmetrical and alternating manner; do not tighten them sequentially. 9. The limit bolts have been adjusted before leaving the factory and should not be easily adjusted. If the drive device is electric or pneumatic, please read the accompanying drive device manual.
10. If the valve opens and closes abnormally, investigate the cause for repair and elimination; do not use force to operate the valve, as this may cause damage. 11. If the valve malfunction cannot be resolved, please notify our company for product installation, usage, and after-sales service.
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