Solenoid valve does not move the fault and troubleshooting methods

Solenoid valve failure will have a direct impact on the switching valve and regulating valve action, the common fault solenoid valve does not act, should be checked from the following aspects: (1) Solenoid valve loose or thread head off, the solenoid valve can not be tight, tight Thread fixed head. (2) Solenoid coil burned out, remove the solenoid valve wiring, with a multimeter to measure, if the open circuit, the solenoid valve coil burned out. The reason is the coil damp, resulting in poor insulation and leakage flux, causing the coil current is too large and burned, so to prevent rain into the solenoid valve. In addition, the spring is too strong, the reaction force is too large, the number of coil turns is too small, and the suction is insufficient, the coil can also be burned. In emergency, the manual button on the coil can be turned to "1" position by the "0" bit during normal operation, so that the valve is opened. (3) solenoid valve stuck. Solenoid valve sleeve and valve spool with a very small gap (less than 0.008mm), are generally a single assembly, when mechanical impurities into or too little oil, it is easy to get stuck. Approach can be used steel wire from the hole into the head, make it bounce. The fundamental solution is to remove the solenoid valve, remove the valve plug and spool sleeve, with CCI4 cleaning, making the spool movement in the valve sleeve flexibility. Disassembly should pay attention to the assembly sequence and the location of external wiring in order to reassemble and wiring properly, but also check the oil mist hole is blocked, the lubricating oil is sufficient. (4) leaks. Leakage will result in insufficient air pressure, making it difficult to open and close the forced valve due to damaged gaskets or slide valve wear caused by several cavity blow-by gas. In dealing with switching system solenoid valve failure, should choose the appropriate time, and so on when the solenoid valve is in power loss processing, if not within a switching gap processing, the switching system can be suspended, calmly deal with.

2835 SMD IR LED

2835 SMD IR LED supplier from China.

We produce and sell 2835 SMD IR LED, which is with the wavelength from 680nm-1550nm.

In this category, we mainly introduce the two kinds of wavelengths: 940nm IR LED and 850nm IR LED. These two wavelengths are the most commonly used wavelengths in infrared monitoring. They all can be used to monitor products.

Then what is the difference between 940nm and 850nm?
940nm infrared LEDs are totally invisible to the naked eye, which means you can't see whether the 940nm working or not. Unless you watch it through some device(like phone's camera), which will show some purple or white color light.
The 850nm infrared LEDs have a very slight reddish when it's working, which means you can see if the 850nm LED is working.

Under the same power, radiation intensity of 850nm will be higher than the 940nm. Of course, 940nm also has its own unique advantages. It is the naked eye that is indistinguishable from work or from work, therefore, its application has been widely used in many special markets in the modern era.

We supply the 2835 940nm SMD IR LED and 2835 850nm SMD IR LED products with difference power, such as: 0.1W 940nm, 0.2w 940nm, 0.3w 940nm, 0.4w 940nm, 0.5W 940nm, 0.6w 940nm, 0.8W 940nm, 1w 940nm, 3W 940nm, 0.1W 850nm, 0.2w 850nm, 0.3w 850nm, 0.4w 850nm, 0.5W 850nm, 0.6w 850nm, 0.8W 850nm, 1w 850nm, 3W 850nm and so on.

In addition, we also add the lens on the top of SMD LED, which can make the SMD LED have an angle like those Thought-hole LED.

For example: 2835 SMD 850nm IR LED with 30 degrees, 2835 SMD 850nm IR LED with 60 degrees, 2835 SMD 850nm IR LED with 90 degrees, 2835 SMD 940nm IR LED with 30 degrees, 2835 SMD 940nm IR LED with 60 degrees, 2835 SMD 940nm IR LED with 90 degrees, etc.
We also can customize the mold of ledns as you needed angle.

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Shenzhen Best LED Opto-electronic Co.,Ltd / BESTSMD CO LIMITED(HK) , https://www.bestsmd.com