Analysis of Internal Leakage Phenomenon of PTFE lined Valve

With the rapid improvement of the economy, the requirements for valve products are gradually increasing. In check valve From the manufacturer's perspective, daily PTFE lined valve The problem of internal leakage seriously threatens the normal operation of the working equipment, and it is difficult to detect whether there is internal leakage in the PTFE lined valves during operation. According to some market data, various PTFE lined valves used by petrochemical enterprises have varying degrees of internal leakage problems.

The reason for the occurrence of such internal leakage phenomena is actually very simple. The main reason is that the material of the sealing surface of the valve disc and seat does not meet the requirements for use, and the processing accuracy is insufficient, Fluorine lined gate valve The wedge angle of the valve plate and seat does not match, the sealing surface width is uneven, the fit is poor, the valve disc is not in place, and there are various factors that prevent it from closing. And how to categorize these reasons, we can divide them into the following three points. Firstly, let's check whether the structural design of the PTFE lined valve sealing pair is unreasonable or whether the manufacturing and assembly accuracy does not meet the requirements; Secondly, whether the installation of the fluorine lined four valve was not carried out according to the requirements and subjected to excessive force; The latter point is whether the manufacturing, transportation, or installation process did not follow the standard requirements.
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