Precautions For Using Ptfe Lined Valves

Publish Time: 04/24 2025 Author: Site Editor Visit: 59

Lined Valve During the use process, many precautions need to be taken to effectively prevent accidents. Generally speaking, operators who come into contact with such valve products should be familiar with the structure of their transmission devices and correctly identify the opening direction, opening mark, indication signal, etc. of the valve. In addition, they need to be able to accurately operate the PTFE-lined valve and handle various emergency failures.
We know that the correct use of PTFE-lined valves is directly related to the service life of the valve and affects the stability of the pipeline. Therefore, precautions during use are important.

1. The opening direction of the PTFE-lined valve is basically counterclockwise for opening and clockwise for closing.
2. The handle of the valve is designed based on sharpness, so the valve can be opened and closed by turning the handle. The PTFE-lined valve is generally not allowed to be opened and closed with the help of a lever or a wrench, because using a lever to open the valve will cause damage to the sealing surface.
3. PTFE-lined gate valves and PTFE-lined stop valves cannot be used for throttling, which is easy to flush the valve plate and sealing surface, and introduce vibration leakage, damaging the PTFE-lined valve.
4. Some large-diameter PTFE gate valves, PTFE stop valves and PTFE butterfly valves are equipped with bypass valves, which are used to balance the pressure on both sides of the valve and reduce the opening force. Therefore, when opening, the bypass valve should be opened first, and then the PTFE valve should be opened slowly. When closing the valve, the bypass valve should be closed first, and then the main PTFE valve should be closed slowly.
5. When opening the PTFE valve, it should be opened slowly to prevent water hammer and damage to the PTFE valve and pipeline.
6. PTFE gate valves and PTFE stop valves cannot be used for throttling, which is easy to flush the valve plate and sealing surface, and introduce vibration leakage, which will damage the PTFE valve.
7. After some PTFE valves are closed, the valve parts shrink after the temperature drops, and there is a slight leakage on the sealing surface. At this time, the PTFE valve should be properly tightened after the PTFE valve is closed.