Electric valve selection techniques and the need to consider factors

 1, control valve selection of issues:

     At present, the project control valve commonly used in the main are: solenoid valve and electric valve. However, they are in use have shortcomings, such as solenoid valves susceptible to blockage, water resistance, large, to be a long-term maintenance of hand; while electric valve while water resistance, but because of the need for the necessary control circuitry, so the corrosive influence of water vapor promotion of life is also plagued a major problem.

2, how to maximize the use of valves to overcome the scale of the impact of

     Whether or electric solenoid valve, the scale will not only result in valve leakage, severe cases may even affect the normal operation of the valve, so how to eliminate the impact of scale is already in the industry are generally of concern.

     Process control valve to the scope is too broad, can not repeat them here to give you make it clear that it was hoped that the content is also personally own investigation obtained. However, as the executing agency and the use of the design caused by different filling materials, poor performance or a control valve can be concluded from the law: 1, process where the presence of dead zone will deviate from the original set point process variable. Therefore, the controller output must be increased to sufficient to overcome the dead zone, only this corrective action will occur. 2, ① the main factors affect the dead zone. Friction, wavering, the valve shaft reversed, the dead zone amplifier. Where a variety of control valves sensitive to the friction is not the same, such as rotary valve for a high seat load caused by the friction is very sensitive, so use note. But for some seal type, high seat load is shut down in order to obtain the necessary grades. Haha, so that out of this valve design is very poor, easily lead to large dead zone, which affect the degree of deviation of the process is obvious, simply be decisive. ② wear and tear. Valve when in normal use wear and tear is inevitable, but the lubrication layer of wear and tear is the most powerful, according to our experiments confirmed that the lubrication of rotary valve after only a few hundred cycles, movements, almost ready to just brush lubrication layer used (an exaggeration point, or writing articles is very depressed). Another stress-induced sealing layer of the load will lead to wear and tear, these are the main factors leading to increased friction. The result? Is to give the performance of control valves in the devastating! ③, packing friction is the major source of friction control valve, the use of filler is different from the friction caused by a great difference. ④, the different types of implementing agencies is also a fundamental influence on the friction, in general, spring film executive body better than the Pistons executing agency.

3, positioning device design issues.

     The sake of the initial thinking from the design, implementation agencies and the positioner design must be considered together. How to design a good locator it? Important feature of his know, must be a high-gain devices. Whose gain is composed of two parts: the static gain and dynamic gain. Static gain to improve the method is to design a preamplifier. For example, nozzle - baffle device. Then have a friend who would like to ask how dynamic gain access to? Is obtained through a power amplifier, the power amplifier is a slide valve (General). Now, some people have already used a microprocessor to set the locator. It appears after the valve will tell Let's talk where he was broken. Hou then do the maintenance is simple. Returning to the subject. At the same time with high static and high dynamic-gain, high-performance positioning device for any given valve component provides lower degree of deviation in the process of the best overall performance. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com m