Sealing Problems Of Fluorine-lined Check Valve

The sealing performance of Lined Check Valve is critical. If the sealing performance is not good, it will cause leakage and affect the operating efficiency. So what are the factors that lead to the sealing performance problems of fluorine-lined check valves? Let's introduce them one by one.
There are many factors that affect the sealing problems of fluorine-lined check valves, and they are also very complicated. The specific introduction is as follows:
1. Physical properties of the medium
Mainly include viscosity, temperature and hydrophilicity. Among them, viscosity is related to the permeability of the sealing fluid. Viscosity is also related to temperature. The viscosity of the gas will increase with the increase of temperature, and the viscosity of the liquid is the opposite. The effect of the hydrophilicity of the contact surface on leakage is caused by the capillary characteristics.

2. Sealing pressure ratio
It is determined by the pressure difference before and after the fluorine-lined check valve and the external seal. Under the same other conditions, the sealing pressure ratio is small, easy to leak, and too large is easy to damage.
3. Sealing pair structure
Under the action of sealing force or temperature changes, the size of the structure will change, changing the interaction force between the sealing pairs, so that the sealing performance is reduced. Therefore, the sealing pair is generally selected with elastic deformation.
4. Sealing pair quality
Mainly includes material selection, matching and manufacturing accuracy.