In practice, the noise of the pneumatic control valve is the main pollution sources in petrochemical production, cavitation and noise are two important problems in the high pressure differential flow control,
1. The mechanical vibration, such as when the pneumatic - valve valve core level within the sleeve movement, can make the clearance between the sleeve and the valve core as far as possible little hard surface casing, may use the
2. Medium mechanics activity - medium in the pipeline may be pneumatic - valve activity, will also announced the noise, about this situation, we do not make detail, cavitation, of course, also can produce noise,
3. The natural frequency of vibration, such as pneumatic - valve valve core is perhaps other components, they all have a natural vibration frequency, and can be specially casting or casting processing to change the characteristics of the valve core, if necessary can also replace other types of valve core,
4. When the form factor is the valve core instability, if caused by the pressure of the fluid oscillation valve core displacement shake and noise, this kind of condition is usually caused by scheduling loop of damping factors such as actuators, perhaps be able to dispatch damping coefficient on the valve core displacement direction combined with vibration isolation facilities,