Rotary switches are mainly installed on liquid and gas lines to regulate the flow and pressure of liquids and gases. In use, the handle is rotated to drive the adjusting nut to rotate, and the left-hand thread is connected with the left-hand thread of the valve to drive the valve to the right or left to change the cross-sectional area of the right-side hole passage in the valve body cavity, thereby adjusting the liquid and gas in the upper outlet pipe. Flow and pressure

Common band switches and universal meter shift switches are rotary switches. There are two kinds of structures: one is BBM (Break Before Make) contact type, which is characterized in that the movable contact is disconnected from the front contact point when transposition After the contact is turned on, there is a state in which the front and rear contacts are disconnected: the other is the MBB (Make Before Break) contact type, which is characterized in that the movable contact has a contact with the front and rear contacts during the transposition. . Then disconnect the front contact and keep in contact with the rear contact. In the circuit design, the appropriate rotary switch should be selected according to the circuit application and circuit safety.