The solenoid valve is a kind of valve in which the spool is moved by an electromagnet. It can open and close the valve by controlling the movement of the actuator. Yuyao Xinsheng Solenoid Valve Manufacturer will introduce the basic knowledge of solenoid valve in detail below.
Electrically speaking, the two-position three-way solenoid valve is generally single-controlled (ie, single coil), and the two-position five-way solenoid valve is generally double-controlled (ie, double coil). The coil voltage level generally adopts DC24V, AC220V, etc. Two-position three-way solenoid valves are divided into two types: normally closed and normally open. Normally closed means that the air circuit is broken when the coil is not energized, and normally open means that the air circuit is open when the coil is not energized. Principle of operation of normally closed two-position three-way solenoid valve: When the coil is energized, the gas circuit is connected. Once the coil is de-energized, the gas circuit will be disconnected, which is equivalent to "jog". Principle of operation of normally open two-position three-way single electronically controlled solenoid valve: when the coil is energized, the gas circuit is disconnected. Once the coil is de-energized, the gas circuit will be connected, which is also "jogging".
The operating principle of the two-position five-way double electronically controlled solenoid valve is to energize the positive-acting coil, and the positive-acting gas circuit is connected. Even if the positive-acting coil is powered off, the positive-acting gas circuit is still connected, and it will be maintained until the reverse Until the action coil is energized. When the reaction coil is energized, the reaction gas circuit is connected. Even if the reaction coil is de-energized, the reaction gas circuit is still connected, and it will be maintained until the positive operation coil is energized. This is equivalent to "self-locking". Based on the characteristics of the two-position five-way dual electronically controlled solenoid valve, when designing the electromechanical control circuit or programming the PLC program, the solenoid valve coil can be operated for 1 to 2 seconds, so as to protect the solenoid valve coil from damage.