Solutions to noise and cavitation problems in the use of pneumatic control valves

In practical applications, the noise of pneumatic control valves is the main source of pollution in petrochemical production. Cavitation and noise are two important issues in high pressure differential flow control.
1. Mechanical vibration-For example, when the valve core of the pneumatic control valve moves horizontally in the sleeve, the gap between the valve core and the sleeve can be as small as possible or a hard surface sleeve can be used.
2. The mechanical activity of the medium-when the medium moves in the pipeline or pneumatic control valve, noise will also be announced. We will not elaborate on this situation. Of course, noise will also occur in cavitation.
3. Natural frequency vibration-such as pneumatic control valve spool or other components, they all have a natural vibration frequency. For this, the characteristics of the spool can be changed by special casting or casting treatment, and it can be replaced if necessary Other types of spools.
4. When the forming factor is the instability of the spool-if the fluid pressure fluctuates due to the vibrational displacement of the spool, this situation is generally caused by damping factors such as the dispatch circuit actuator. It is possible to reschedule the damping coefficient or add damping facilities in the direction of spool displacement.