Pid legend issue.
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What is the function of the flow control orifice plate here?
Is the valve for that bypass open?
The last edit to this post was made by *aobing on 2017-7-18 at 15:46. It can be considered a bypass pipeline for the check valve at the pump outlet; it allows the flow of material in the reverse direction during shutdown and drainage, or when the pump is under maintenance, thereby preventing the material from flowing only in one direction due to the presence of the check valve
1. After stopping the pump, drain the medium from the outlet pipeline; this is applicable for transporting volatile media. 2. Used when warming up the pump. 3. Used when filling the pump
Which one? Is it from pipeline 00007C? This pipeline is normally closed.
When starting a high-head pump, the one-way valve at the outlet is under excessive pressure and thus difficult to open; forcing it to open poses a risk of damaging the valve stem and other components. By installing bypass lines with flow-limiting orifice plates before and after the outlet check valve, it can be opened easily. At the same time, the bypass line also helps to reduce pipeline vibration and noise.
1. After stopping the pump, drain the medium from the outlet pipeline; this is applicable when transporting volatile media. 2. Used for warming the pump. 3. Used when filling the pump. This should be the correct answer; in fact, I think it’s mainly used for warming the pump