How To Avoid A Decrease In The Service Life Of Fluorine Lined Check Valves

During the use of Lined Check Valve, various special situations may be encountered, and some situations may reduce the service life of the valve. So, how can we avoid the probability of reducing the service life of the valve.

Now let's talk about the methods to reduce the possibility.
1. The flange cover plate of the vertical fluorine lined check valve cannot be opened arbitrarily unless it is prepared to be connected to the pipeline. Otherwise, the PTFE flange surface may be damaged, scratched or twisted due to temperature difference or foreign objects, which may affect the sealing. If the cover plate needs to be moved for inspection, it must be quickly reset after inspection to protect the PTFE flange surface.
2. When a vertical fluorine lined check valve is connected to a pipeline, it is generally not necessary to use a separate gasket. However, when it is connected to a flange surface made of different materials (such as metal surfaces), an appropriate gasket should be used to protect the PTFE flange surface.
3. If a vertical fluorine lined check valve leaks at high temperatures during system use, the system temperature should be lowered to room temperature first, and then the cause should be identified and repaired.
4. Vertical fluorine lined check valves are not allowed to undergo any high-temperature welding work on the fluorine lined valve to avoid damage to the lining layer.
5. When installing a vertical fluorine lined check valve, the flange nuts should be tightened evenly in a diagonal direction (symmetrical) and matched with appropriate torque:
If there is a leakage on the flange sealing surface and the nut at the leakage location is already locked, the nut at the leakage location should be loosened by half a turn, and then the opposite side should be tightened again with the same torque.
If the above methods still fail to stop the leakage, the PTFE flange surface should be checked for bumps, indentations, scratches, and can be leveled and reconnected with fine yarn paper or cloth.
6. Vertical fluorine lined check valves should be stored in a dry and ventilated room, and stacking is strictly prohibited.
7. The repaired fluorine lined valve must be tested and qualified according to relevant standards before installation.
8. When manually operating fluorine lined valves, it is not allowed to use other levers to forcefully open or close the valve.
9. When installing fluorine lined valves with directional requirements, attention should be paid to the flow direction of the medium as indicated by the arrow on the valve body, and ensure easy operation and maintenance.