Under what circumstances should the regulating valve not be bypassed?
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According to the production specifications of chemical companies, under what circumstances is it possible that the regulating valve should not be bypassed?
Increasing the bypass of the regulating valve will increase the cost. As long as the regulating valve is of reliable quality and durable, there is no need to install a bypass. However, the quality of domestic regulating valves is not very good, so it is best to import them.
The regulating valve does not need to be equipped with a bypass if it has the following conditions:: (1) Places to reduce leakage of hazardous media, such as hydrogen, phenol or hydrofluoric acid pipelines, etc. (2) When the regulating valve fails or is repaired, safety and operation will not be affected. (3) It is difficult to introduce flushing fluid into a pipeline with a slurry medium, or sediment may occur in a pipeline where the fluid does not flow continuously. (4) DN≥80 regulating valve with hand wheel. (5) The regulating valve on the turbine steam pipeline that drives the standby pump. For reference.
Agree with the second floor's point of view. The main thing is the quality assurance of the regulating valve. In addition, it is also related to the nature of the regulating circulation medium. External conditions cannot block the operation of the regulating valve.
I agree with the above opinions. In addition, when stable and accurate fine adjustment of process parameters is required, a small regulating valve can also be bypassed for split-range adjustment. This allows for fine, stable process adjustment requirements, but of course, at an increased investment cost.
Our regulating valves are all equipped with bypass, so that when the regulating valve fails, it can be replaced without affecting production.
Agree with the second floor's point of view, a high-quality regulating valve does not require bypass.
If you consider that if the key parts are replaced, it will take time to pause and affect other parts, it is best to add a bypass. The explanation on the fifth floor is really good, reminding me that I was not aware of the dangers of setting up bypasses for dangerous pipelines before.