What If The Valve Oscillates? How To Solve It?

The spring stiffness of the control valve is not enough, the output signal of the control valve is not stable and the rapid change is easy to cause the oscillation of the control valve.It is also said that the valve selection frequency and system frequency or the pipeline, the base of violent vibration, so that the control valve vibration.Improper selection, regulating valve work in the small opening of the existence of a sharp flow resistance, velocity, pressure changes, when more than the stiffness of the valve, stability becomes poor, serious oscillation.

Because the cause that produces oscillation is many-sided, so specific problem is specific analysis.For slight vibration, the stiffness can be increased to eliminate.If the selection of large stiffness spring, use piston executive structure.Severe vibration of pipeline and base eliminates vibration interference by increasing support.

Select valve frequency and system frequency the same, then replace the valve of different structure.The oscillation caused by the operation in the small opening is the improper selection of the circulation capacity C value is selected large, must be re-selection of the circulation capacity C value is small or the use of divided process control or sub valve to overcome the control valve working in the small opening.