Why is the flow control valve installed downstream of the flowmeter? What is the function?
In time, the valve body is fully open, and most of the valves will make the straight pipe at the front of the flowmeter smaller. The valve has a necking or even curving passage.Also, I have never seen any kind of flowmeter which is afraid that a large amount of liquid will flow into the flowmeter and cause the flow meter to be damaged.
Obviously, the size of the traffic is controlled. Upstream is the protection of the flow meter to prevent rapid or heavy flow of liquid into the flowmeter, resulting in damage to the flowmeter.
Generally speaking, if there are both flow meters and control valves in the pipeline, they basically measure the flow with a flow meter, and then use the control valve to control the flow.There is no control valve in front, flow meter in the back way, yes. The advantage is that, in many cases, the flowmeter will be sensitive to changes in pressure, the control valve is added to the front, the pressure drop is mostly on the valve, the flow measurement will be stabilized later. But the problem is that the measurement is lagging behind the control, that is, the flow measured by the flow meter is out of your control. It flows to the back and is not in control.Therefore, in most cases, the control valve should be placed behind the sensor.
After the fluid flow control valve, flow control valve at the end will produce change, for example, the cyclone spoiler for flow measurement is very influential, so usually will be installed in front of the body of the flowmeter.
