Sudden sharp increase in flow rate of the orifice meter when the valve is opened slightly
Thread Content
Why is this? ? The processing capacity is too low, so automatic control cannot be maintained in the loop. When the opening is around 7-5, the orifice meter shows a sudden change. Why is that? ? The gauge is in front of the valve.
7-5 opening degree – this processing capacity is far too low; automatic control is not suitable; manual operation is required.
Use the manual valve to control it and see if there’s a sudden change in flow. With the valve open to such a small degree, do you still want to switch to automatic mode?
At the same 5% opening, some achieve a flow rate of 50%, while others only reach 10%. The only common factor is that by closing the valve further starting from 5, the orifice plate flow rate increases sharply in a spike-like manner, and it will continue to rise if no adjustments are made. The actual traffic shouldn’t be this high; I don’t know why. .
The design is unreasonable; at low flow rates, the measurement error of the orifice plate is very large.
It’s impossible to achieve stable manual control; there are sudden changes at low valve positions. However, at valve positions of 8-26, both automatic and manual control remain stable
The valve position is low, but the flow rate is not low. 30-15% of the traffic. .
An increase in mutations is caused by an elevated back pressure in the process pipeline and an increased flow rate; it has nothing to do with the instruments, and vice versa.
Do you mean that the too small opening causes pressure buildup in the pump, or that the feed pump downstream of the valve creates a vacuum?
Expert, I don’t understand – shouldn’t back pressure not be able to get through?