Common faults and elimination methods of butterfly valves
1,Butterfly valveBefore installation, confirm whether the performance of our products and the arrow of the flow direction of the medium are consistent with the working conditions, and the inner cavity of the valve is inserted and cleaned. No foreign matter attached to the sealing ring and butterfly plate is allowed, and it must not be closed before cleaning. Butterfly board, so as not to damage the sealing ring.
2. It is recommended to use the special flange for the butterfly valve, that is, the HGJ54-91 type socket welding steel flange for the installation of the disc plate.
3. The best position for installation in the pipeline is vertical installation, but not upside-down installation.
4. The flow rate needs to be adjusted during use, and it is controlled by a worm gear box.
5. For the disc valve with a large number of opening and closing times, open the worm gear box cover in about two months to check whether the butter is normal. Keep a proper amount of butter.
6. Check the tightness of each connection part, which not only ensures the bee-like nature of the packing, but also ensures the flexible rotation of the valve stem.
7. Metal sealButterfly valveThe product is not suitable to be installed at the end of the pipeline. If it must be installed at the end of the pipeline, an outlet flange must be installed to prevent the backlog of the sealing ring and over-position.
8. Valve stem installation and use response Periodically check the valve use effect, and promptly remove any faults found.
9. Please refer to the following table for the timely elimination methods of possible failures:
| Possible failure | Cause | Elimination method |
| Leakage of sealing surface | 1. There are sundries on the butterfly plate and sealing surface 2. The closing position of the butterfly plate and the sealing surface is not correct 3. The outlet side is equipped with flange bolts that are unevenly stressed or not according to the requirements of Figure XNUMX. 4. The direction of the pressure test is not in accordance with the requirements of Figure XNUMX |
1. Eliminate impurities and clean the inner cavity of the valve 2. Adjust the adjusting screw of the worm gear or electric actuator to achieve the correct closing position of the valve 3. Check the mounting flange plane and bolt compaction country, which should be evenly compacted 4. Press in the direction of the tip seal |
| Leakage on both ends of the valve | 1. The sealing gaskets on both sides fail 2. Uneven or uncompressed pipe flange tightness 3. The upper and lower gaskets of the sealing ring are invalid |
1. Replace the sealing gasket 2. Tighten the flange bolts (uniform force) 3. RemovevalvePressure ring, replace the seal ring, failed gasket |