Self-Acting DP Control balancing valve

In the air-conditioning and heating systems, especially in variable flow system, the situation changed when the system is running, the differential pressure of control valve or both ends of terminal equipment will change also.
Once differential pressure was changed too high to precise control will lead to a series of problems: low precision or heavy noise generation in control valve actuation, more serious will cause the control valve cannot be closed, the system function failure even and so on.