Summary of Leakage Causes Caused by PTFE lined Valves

PTFE lined valve It is a type of valve, and the leakage of PTFE lined valves can be divided into two categories: sealing surface leakage and sealing ring root leakage. So, what are the main causes of leakage? Let's list these possible reasons in detail.

Introduction to common types of PTFE lined valves

The reasons for leakage include:
1. The sealing surface is not ground well.
2. Sealing ring and valve seat The valve disc does not fit tightly.
3. The connection between the valve disc and the valve stem is not secure.
4. The valve stem bends and twists, causing the upper and lower closing components to be misaligned.
5. Close too quickly, the sealing surface has poor contact or has already been damaged.
6. Improper material selection cannot withstand the corrosion of the medium.
7. Turn off the shut-off valve Gate valves are used as regulating valves. The sealing surface cannot withstand the erosion of high-speed flowing media.
8. Some media gradually cool down after the valve is closed, causing fine cracks on the sealing surface and also leading to erosion.
9. Certain sealing surfaces and valve seats Threaded connections are used between valve discs, which can easily lead to oxygen concentration differences and corrosion and loosening of the battery.
10. Due to welding slag Rust Dust and other impurities are embedded, or mechanical parts in the production system fall off and block the valve core, making the valve unable to close tightly.

For these possible reasons that may cause leakage of PTFE lined valves, corresponding preparations should be made and relevant preventive measures should be taken to prevent leakage from occurring.