The air pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the electronic pressure switch can send out a control signal. When the measured pressure exceeds the rated value, the free end of the elastic element produces a displacement to directly push the switch element, changing the on-off state of the switch element to achieve the purpose of control.
Mounted on the frame with the valve seat. It is connected with the front brake air path through the three-way and the air pipe, which is the control switch when the brake pedal is used to operate the retarder. Under the action of brake pressure, the pressure switch is switched on successively to control the action of the relay box.
