A butterfly valve is a type of quarter-turn valve that controls the flow of a product in a pipeline.
Butterfly valves are usually grouped into two types: lug-style and wafer-style. These me...
1. Clean the sealing surface of the butterfly valve and the dirt in the pipeline.
2. The inner port of the flange on the pipeline must be aligned and press the rubber sealing ring of the butterfly ...
Valves play a vital role in industrial piping systems, controlling the flow of fluids. However, valve leakage often plagues many companies, leading to reduced productivity, wasted resources, and po...
Valve selection principle
The selected valve should meet the following basic principles.
(1) Safety and reliability of petrochemical, power station, metallurgy and other industries require continuo...
1. Defect characteristics
Unfused refers to the phenomenon that the weld metal is not completely melted and bonded with the base metal or between the layers of the weld metal.
Failure to penetrate ...
1. The stomata
This is a small cavity formed by the gas that the metal solidification process does not escape inside the metal. Its inner wall is smooth and contains gas, which has a high reflectiv...
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