A Direct Acting Solenoid Valve is a type of solenoid valve whose working principle is relatively straightforward and simple. In this solenoid valve, the electromagnetic force acts directly on the spool (usually a piston or diaphragm) to control the opening and closing of the valve. When the electromagnetic coil is energized, the electromagnetic force generated will attract the spool, make it move and change the opening and closing state of the valve; When the solenoid is powered off, the electromagnetic force disappears, and the spool usually returns to its original position through a spring or other reset mechanism, thus closing the valve.
Direct-acting solenoid valve features include:
Simple structure: Because the electromagnetic force directly acts on the spool, its structure is relatively simple and there is no complex transmission mechanism.
Fast response speed: Due to the direct action of the electromagnetic force, the response speed of the direct-acting solenoid valve is usually faster, and the valve can be opened or closed quickly.
Suitable for low pressure difference: The opening and closing force of the direct acting solenoid valve mainly depends on the electromagnetic force and the spring force, so it performs well in the environment of low pressure difference or zero pressure difference. However, for high pressure differential application scenarios, a larger electromagnetic force may be required or other types of solenoid valves may be used.
Diameter limitation: Due to the structural limitations of direct-acting solenoid valves, their diameter (that is, the diameter of the valve that allows fluid to pass through) is usually small, generally not more than 25mm. This limits its use in high-traffic applications.
