Flowmeter bypass valve
Thread Content
I noticed that the design of our company includes a stop valve for the flow meter’s bypass. In my opinion, the bypass should be used only during maintenance, and a gate valve would suffice for that purpose. I’m not sure if my understanding is correct; I would appreciate the insights from those who are more experienced
I don’t quite understand what you mean. A globe valve and a gate valve can be the same type of valve; it’s just that their naming conventions are different. A globe valve is named based on its function, while a gate valve is named based on its structure. Therefore, a globe valve can be either a gate valve, or a ball valve, needle valve, or butterfly valve. Gate valves generally serve to shut off or open flow.
There’s a point upstairs; isn’t the leakage from the gate valve on the side path quite large? Won’t the value measured by that flow meter be lower than the actual value?
If only a check valve is installed on the bypass, it should be ineffective. Send me a text message to let me know if there’s a result. Thank you.
A stop valve should be used; gate valves do not have the function of regulating flow rate. In addition to maintenance, another situation is that when the flow rate is too high, the rotor of the rotameter may be pushed to the very top of the meter, causing the flow of the medium to be interrupted. At this time, the bypass can be turned on temporarily
A gate valve or stop valve can be used as a bypass valve for the flow meter; you should take a close look at the composition of that circuit. If there is a gate valve or some other valve after the flow meter in the control system, as LZ said, it’s meant for maintenance purposes, so it doesn’t matter. In flowmeters without a control system, what is used for bypassing is essentially a globe valve, as it enables more precise adjustment of the flow rate compared to gate valves, thereby ensuring the continuity of production operations.
You have mixed up the control valve and the stop valve