What is the performance of the solenoid valve broken

Solenoid valve is broken what performance, specific what performance, in fact, very simple, do not need any special detection tools can judge the solenoid valve is broken, if you feel the solenoid valve is broken, generally can take three simple steps, one listen, two look, three tests, the first two steps can judge most of the problems, The following by the technical staff to share with you the electromagnetic valve is broken what is the simple judgment method.
First: listen to the performance of the voice;
1, the speed of the solenoid valve is all the valve inside the fastest, ms level, under normal circumstances the power moment will hear "bang" a sound, crisp, if the coil burned, certainly no sound;
2, there is another situation is the power after the continuous "bang" "bang" sound, this is generally insufficient suction, insufficient voltage or valve cavity impurities lead to spool stuck;
3. There will also be sound after the AC solenoid valve is energized, but the continuous and stable current sound is normal;
4, if the solenoid valve action, at this time should be able to hear the flow of the pipeline medium;
Second: look at the external performance;
1, see whether the coil is up, split,
2, see whether the wiring is damaged;
3, the valve body is cracked, especially some plastic or iron valve body, easy to aging at low temperature or high temperature, this problem may occur;
Third: test internal performance;
1, if the coil is good, there will be a magnetic field outside the coil, with a nail try to know;
2, touch the temperature of the coil, in addition to high and low temperature solenoid valve, the general solenoid valve energized after half an hour or so, touch is warm, if it is cold basic can judge the connection break, if especially hot (except steam class high temperature medium) basic can judge is short circuit;
3. If you can hear the sound of water or air flow at the outlet of the pipeline after closing, but you can obviously feel that there is no sound when the valve is opened - what is the performance of the solenoid valve broken - this is an obvious one, that means the valve is not tightly closed, the sealing position is out of the question.