Miniature solenoid valve option principle description

To ensure reliability and repeatability; when the instrument design engineer chooses the micro solenoid valve, it is often hoped that the component can be operated very reliably, especially to ensure long-term stability and repeatability. It is best to hope that there is no such thing for a long time. Operating fluctuations and exceptions occur, which often becomes the first parameter for screening precision components.
 
For example, the selection of the isolation valve used in the blood sampling channel and the counting channel usually affects the repeatability of the whole machine. In the high performance liquid chromatography, the quaternary gradient isolation valve needs more uniform response time to make it easier to meet the test requirements. Sexuality has an intuitive difference in the detection of sensitivity repeatability.
 
Even an early choice of original accessories can lead to serious unpredictable consequences. The later the design flaw is discovered, the higher the modification cost. Because when you need to replace components, you need to repeat a series of tests. Therefore, in this case, engineers generally use components with high reliability, and will pay special attention to the valve production process, quality inspection and test control.
 
In particular, the design of the miniature solenoid valve directly affects the reliability of the device itself. For example, in the analytical test instrument, the miniature solenoid valve directly contacts the sample reproduct, but most of the miniature isolation valves have an internal rubber material, which is in contact with the sample reproduct. It may swell. If you do not consider any design pre-compensation, then the rubber material will change the parameters and performance of the micro solenoid valve after a long time of use, and even affect the component to work properly, resulting in the problem that the entire instrument can not work. Experienced component designers will consider the application of the valve, especially the compatibility of chemical substances and other practical applications on the valve.
 
Ensuring a longer service life; continuous service life is the first consideration for miniature solenoid valves in most applications, especially in some applications where longer continuous service life is required. For example, in medical equipment and high-running instruments, the equipment requires continuous operation, requiring that the number of failures of the device be minimal or even zero, even after a long period of use. Frequent maintenance and replacement of valves is best avoided. The continuous high service life also means that the components have better reliability in complex and varied applications.
 
In fact, the high reliability life guarantee is difficult to achieve. Experts with experience in valve design have mentioned that the most troublesome thing for high service life is to move the closed film, that is, the design of the diaphragm. Whenever the valve is working, the diaphragm will be pulled up by the pull rod. After several million reciprocating motions, the diaphragm pulled by the push rod will be worn. This will happen in most valves. Some manufacturers change the push rod or The diaphragm material is designed to solve.
 
Experienced application engineers consider the design of reducing diaphragm deformation when considering long service life, which ensures a smoother contact surface and less impact, especially for valves with metal body valves. Both the plastic body and the plastic pusher have better durability. Life-influencing factors should also be included, including the application of the fluid, the time the valve needs to be continuously energized, some extreme use conditions, or the application differences caused by various influencing factors. Some manufacturers test the life of 500,000 times, but some manufacturers have already achieved tens of millions of lifetimes.