How to judge the quality of solenoid valve

First, controlled media (liquid and gas under pressure; The pressure value is the middle value of the solenoid valve pressure range), and then energize the solenoid valve coil. If the controlled medium changes from on to off or from off to on, then the solenoid valve is good, otherwise there is a problem.

The quality of solenoid valve mainly depends on two aspects, one is the coil and the other is the valve body, so these two aspects are tested well.

You find a 24V power supply and connect it to the coil. If you can hear the noise, it means that the coil and valve core of the solenoid valve are normal, and you can inhale normally, and then check whether there is air leakage. If there is an air source, it is best to directly connect the air source to determine whether there is air leakage. If there is no air source, you can plug the air outlet and blow it off with your mouth. In addition, the multimeter can also be used to check the coil. ?

Unplug the plug when the solenoid valve is energized, and measure whether there is electricity with a multimeter;

2. When the solenoid valve is energized, use a thin steel wire to approach the coil to see if there is suction.

3. The solenoid valve is powered on and off. I tried again and again, and poked the brass "pit" on the solenoid valve shaft with a very thin Allen wrench to see if I could suck it in and pop it out.