Selection of valves
Thread Content
The liquid material in the pipeline solidifies at temperatures below 20 degrees, which is why the pipeline is equipped with heating. Ball valves are used on this pipeline, and the valves are closed after each transfer of material to prevent contamination by materials of different specifications. Since there is material inside the pipeline, the heating causes the material to expand, leading to leaks in the ball valve stems; as a result, the valves have had to be replaced several times. Given that the pipeline is used for frequent material transfers, it is not practical to blow out the pipeline with nitrogen after each transfer. Are there any suitable valves recommended?
Since ball valves have dead zones that can easily lead to crystallization and blockage, plug valves could be considered.
The operating principle of selector valves and ball valves is similar. I cannot agree with the view on the second floor. A plunger valve could be tried, as it can clean the residues on its valve element by itself when it is closed.
Thank you for the suggestion from above; I have used it before, but the same problem occurred. After discussing it with the engineering department, it was determined that the sealing performance of the valve cores in both cases is roughly the same, so there is no significant difference in effectiveness.