What does the black knob of the two-position three-way pneumatic solenoid valve do?

The black button of the two-position three-way pneumatic solenoid valve is called the manual control button. Used to switch the working state of the manual control solenoid valve. There are two types: knob type and button type. The knob needs to be reset after replacement; It can automatically bounce back and reset after being pressed by the button.

The black control button with arrow is a knob manual control button. Due to the installation, debugging and fault maintenance of pneumatic solenoid valve.

The black knob cannot adjust the intake speed.

Do not operate the knob when the solenoid valve is charging.

After the black knob is passive, the solenoid valve cannot work normally after the air source is restored. Due to the change of the knob (arrow pointing position), the normal working state of the 2-position three-way valve electronic control has been changed (equivalent to power-on), and it needs to be manually reset to the original position before the power-on control can work normally.

Judging the on or off state of the black knob type is: generally, the knob arrow points to "0" for off, and points to "I" for on. In addition, there are two kinds of two-position three-way pneumatic solenoid valves: normally closed valve and normally open valve. Therefore, indicating "0" does not mean turning off the gas, and indicating "I" does not mean turning on the gas.