Control valve flow characteristics used to compensate

for the different characteristics of the controlled object
If the optional flow characteristics inappropriate will control
Deterioration of the quality control system. For example, in a small flow and large flow, the sensitivity of the control system. Failure analysis are as follows
Controlled object has the saturated nonlinear characteristics (for example, temperature control system) flow control system to normal operation, but the large flow control system sluggish. Or small flow control system is very sensitive, even to oscillations and instability, but in a large flow control system to normal operation. The cause of the fault is the choice of linear or quick opening flow characteristics of the control valve. The Troubleshooting method is to replace the the Trim control valve or control valve, or install the valve f Diao locator, the control valve to meet the percentage or parabolic flow characteristics requirements.standard air cylinder
2 controlled object has a linear characteristic (for example, flow servo control system) o small traffic control system is operating normally, flow control system oscillation or instability. Or small flow control system sluggish, large flow control system to normal operation. The cause of the malfunction is selected percentage or parabolic flow characteristics control valve. The Troubleshooting method is to replace the the Trim control valve or control valve, or install a valve positioner control valve to meet the linear flow characteristic requirements.
Control valve rated flow coefficient poorly chosen. Selection of rated flow coefficient is too large or too small, the minimum or maximum flow control valve can be adjusted larger or smaller, can not meet the operational requirements of the process of the production process. Control valve small opening in the large open position, poor quality control. The troubleshooting methods recalculated control valve flow coefficient, installed to meet the requirements of the control valve. For example, direct control valve according to the process pipe diameter matching the rated flow coefficient is too large, the rated flow coefficient is too small due to the production scale.high temperature solenoid valve