The main factors influencing electromagnetic valve dead area. The friction, the moving, valve shaft torsional, amplifier, dead zone. Of various control valve on the friction sensitivity is not the same, such as rotary valve for the friction caused by the high seat load is very sensitive, so take note when using. But for some seal type, high seat load is necessary in order to obtain close ranks. Like this, this valve is designed is very bad, easy to cause a lot of dead zone, the impact on the process of the deviation degree is obvious, it is decisive. Wear and tear. Regulating valve wear during normal use is inevitable, but the lubrication layer of wear is the best. Additional stress caused by load can also lead to seal layer of wear, these are the main factors lead to friction increases. Result to a devastating packing friction is the influence of the performance of the control valve control valve friction is the main source of the use of packing is different, there's a big difference caused by friction. Actuator type also has a fundamental influence on the friction, in general spring thin film actuator is better than piston actuator. Now the engineering of the control valve is mainly: the widespread use of electromagnetic valve and the electric valve. But they have defects in use, such as: solenoid valves easily by foreign bodies blocked, water resistance is big, must be long-term specialist maintenance, etc. ; Although there is no water resistance and electric valve, but due to the need to have the necessary control circuit, so that water vapor erosion prevention affect the service life is also the main problem in marketing. Locator design problems from the design of the original thinking, actuator and positioner design must be considered together. How to design a good locator? Knew from his important properties, must be a high gain device. The gain is composed of two parts: static gain and dynamic gain. To improve the static gain method is to design a preamplifier. Such as nozzle baffle device. So have a friend to ask for dynamic gain? Generated by a power amplifier, the power amplifier is slide Industrial Valves ( General) 。 At the same time has high static and dynamic gain high performance locator for any given regulator component provides the best overall performance process deviation degree reduction. How best to overcome the influence of the scale of the regulator using both solenoid valves and electric valve, scale not only can cause valve leakage, serious when even will affect the normal work of the regulating valve, so how to eliminate the influence of scale and issues of common concern to the personage inside course of study. Control valve of the process involves the range is too wide, can't give you say clear, here also hope this aspect of the content yourself to look up information. But in different design and the use of filler material actuator control valve performance difference can be summed up its regular: in the process there will be dead area the process variable deviates from the original set point. So the output of the controller must increase to enough to overcome dead zone, only the corrective action occurs. Electromagnetic valve WWW. bjdfm。 . net steam solenoid valve WWW. omzkfm。 Com water electromagnetic valve WWW. bjdfm。 净
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