The causes of internal leakage of hard seal butterfly valves can be as follows:
OneSeal face wear:
With prolonged use and improper maintenance, the sealing surface may be worn, resulting in air or liquid leakage. This can be caused by friction when the valve is closed, or by the erosion of the sealing surface by the medium.
IIThe sealing surface is uneven
An uneven seal can lead to an incomplete seal, resulting in air or liquid leakage. It can be caused by inaccurate machining, improper installation, or wear and tear.
IIIAging of sealing materials:
Sealing materials may deteriorate over time, resulting in a decrease in sealing performance. This may be due to the influence of the chemical properties of the medium on the sealing material, or the fact that the valve has not been used for a long time has caused the sealing material to become hard and brittle.
FourthImproper bolt tightening:
If the bolts are not properly tightened, the sealing surfaces may not be in contact properly, resulting in air or liquid leakage. This may be caused by uneven or insufficient tightening force during installation.
FiveValve structure problems:
Problems with the construction of the valve itself can also lead to air leaks or leaks. For example, the seal surface is not properly designed, resulting in some areas not being completely sealed. Or the seal between the stem and bonnet is imperfect.
In order to solve the problem of internal leakage of hard seal butterfly valves, the following measures can be taken:
Regular maintenance: Regularly inspect and maintain the sealing surface to ensure that it is flat and clean. If the sealing surface is severely worn, the sealing material needs to be replaced.
Increased selection of sealing materials:Choosing a corrosion-resistant, anti-aging sealing material can improve the life of the sealing performance.
Attention Installation:Install and tighten the bolts correctly to ensure that the sealing surfaces are in normal contact and evenly stressed.
Choosing the right valve structure:Choose a valve with reasonable structure and good sealing performance to avoid air leakage or liquid leakage caused by the valve's own structural problems.
In short, the causes of internal leakage of hard seal butterfly valves are mainly related to the wear and unevenness of the sealing surface, the aging of sealing materials, improper bolt tightening and valve structure problems. Internal leakage in hard-seal butterfly valves can be reduced or eliminated through regular maintenance, selection of appropriate sealing materials and valve construction, and proper installation and tightening of bolts.
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