Solenoid valve (Electromagnetic valve) is an industrial equipment controlled by electromagnetic, which is an automatic basic component used to control fluid. It belongs to the actuator and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve can be matched with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed. There are many kinds of solenoid valves. Different solenoid valves play a role in different positions of the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed control valves, etc.
Nowadays, the combination of automatic spray technology and industrial robots has also been more and more widely used. Robotic arms, vision systems and precise spraying techniques greatly improve operational efficiency while reducing the consumption and waste of expensive chemicals. Unmatched versatility, efficiency and operational flexibility, especially in complex coating and drying operations.
As a part of advanced manufacturing industry, with the continuous improvement and improvement of functions and performance, the application field of automatic spray robots is expanding, replacing manual labor in some monotonous, frequent and repetitive long-term operations in industrial production, or dangerous operations in harsh environments.
How CYCO Electromagnetic Nozzle Works
Electromagnetic nozzle – When the coil is energized, a magnetic field is formed, and the electromagnetic coil generates an electromagnetic force to lift the movable core up, the sealing plug is opened, and the liquid flows out from the sealing seat; when the power is off, the electromagnetic force disappears, and the spring behind the movable core presses the movable core On the sealing seat, the liquid channel is closed.
1. Solenoid valves are divided into three categories in principle:
Direct acting solenoid valve
Principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens; when the power is off, the electromagnetic force disappears, the spring presses the closing member on the valve seat, and the valve closes.
Features: It can work normally in vacuum, negative pressure and zero pressure, but the diameter generally does not exceed 25mm.
Step-by-step direct-acting solenoid valve
Principle: It is a combination of direct action and pilot type. When there is no pressure difference between the inlet and the outlet, after the power is turned on, the electromagnetic force directly lifts the pilot small valve and the main valve closing piece up in turn, and the valve opens. When the inlet and outlet reach the starting pressure difference, after the power is turned on, the electromagnetic force pilots the small valve, the pressure in the lower chamber of the main valve rises, and the pressure in the upper chamber drops, so as to use the pressure difference to push the main valve upwards; when the power is off, the pilot valve uses a spring The force or medium pressure pushes the closing member, moving downward, causing the valve to close.
Features: It can also act under zero pressure difference or vacuum and high pressure, but the power is large, and it must be installed horizontally.
Pilot operated solenoid valve
Principle: When the power is turned on, the electromagnetic force opens the pilot hole, the pressure in the upper chamber drops rapidly, and a pressure difference between upper and lower parts is formed around the closing member. The fluid pressure pushes the closing member to move upward and the valve opens; When the hole is closed, the inlet pressure quickly forms a pressure difference around the valve closing member through the bypass hole, and the fluid pressure pushes the closing member to move down to close the valve.
Features: The upper limit of the fluid pressure range is high, which can be installed arbitrarily (need to be customized) but must meet the fluid pressure differential conditions.
2. The solenoid valve is divided into six sub-categories from the difference in valve structure and material and the difference in principle: direct-acting diaphragm structure, step-by-step direct-acting diaphragm structure, pilot diaphragm structure, direct-acting piston structure, Step-by-step direct-acting piston structure and pilot piston structure.
3. Solenoid valves are classified by function: water solenoid valve, steam solenoid valve, refrigeration solenoid valve, low temperature solenoid valve, gas solenoid valve, fire solenoid valve, ammonia solenoid valve, gas solenoid valve, liquid solenoid valve, micro solenoid valve, Pulse solenoid valve, hydraulic solenoid valve normally open solenoid valve, oil solenoid valve, DC solenoid valve, high pressure solenoid valve, explosion-proof solenoid valve, etc.