Pneumatic control valve is mostly used in industry system. Pneumatic control valve is mainly used with other instruments together . In fact, Pneumatic control valve is mainly used to realize the function of flow automatic regulation and remote control ,to control liquid level, pressure, temperature for other media such as liquid, gas and steam in the production process.Therefore, the use of control valve is directly related to the development speed of operation and the completion of the project support.

In the daily use of pneumatic control valve, we often have various failures, let us analyze together:
what we should do if the pneumatic control valve fails to operate?
(1) let us analyze the causes of it: no signal pressure or diaphragm crack, air leakage or reduction of thrust;Or the valve stem bending and other a series of failure reasons to regulate the normal operation of the valve.what happens in this situation? Connect the signal line and air source connector firmly or replace the diaphragm directly;Straighten the stem or replace it.In this way, the immediate failure can be quickly resolved and re-run.
(2) Pneumatic control valve operates normally, but it has no regulating effect.What's the reason?This is mainly due to spool shedding or pipe clogging.If so, the control valve can not play the adjustment role, the solution is to connect the valve core and stem firmly, and dredge the pipeline .
(3) Pneumatic control valve is slow in operation or shows signs of beating.In this case, the packing is aging or dry, resulting in increased friction between stem and packing;The pipe is clogged with dregs.The best solution is to replace the packing, clean up the debris in the pipe and keep the pipe running smoothly.
(4) Pneumatic control valve is unstable or produces oscillations.Such circumstance analysis is Pneumatic control valve diameter selection mistake,the diameter is too big, let the professional engineer check the system and choose appropriate valve.
 
In daily use, there is no way to avoid the failure in choose the suitable pneumatic control valve. Every detail cannot be missed. the negligence will lead to the medium leakage and cause heavy losses.