Direct acting solenoid valve is a fluid control component that relies on electromagnetic force to directly drive the valve core action. Its core functional characteristics are as follows:

working principle

Direct acting control: After the electromagnetic coil is energized, it generates a magnetic field that directly acts on the valve core to overcome spring force or medium pressure, achieving the opening or closing of the valve

Normally closed, it closes when powered off and opens when powered on; The normally open type is the opposite

Zero pressure difference response: It can still work reliably in vacuum, negative pressure, or zero pressure difference environments without relying on medium pressure difference

Performance Characteristics

Simple structure: fewer components (usually no more than 10), low maintenance costs

Quick response: The startup time can be as short as a few milliseconds, suitable for high-frequency action scenarios (such as 5-10 times per second)

Widely applicable media: can control liquids, gases, vapors, and low viscosity oils (≤ 20CST)

Installation restriction: Horizontal installation is required, and the flow direction of the medium must be consistent with the arrow on the valve body

limitation

Diameter limit: generally applicable to small-diameter pipelines below DN25

High energy consumption: The coil power is relatively high (such as 30W-50W), and it is easy to generate heat when powered on for a long time

Narrow pressure range: The maximum working pressure usually does not exceed 0.8MPa, and other types should be selected for high-pressure scenarios

Typical application scenarios

Vacuum system: such as laboratory equipment, vacuum packaging machines

Low pressure fluid control: water treatment, small pneumatic devices

High safety requirements: Normally closed solenoid valves in gas equipment can automatically cut off the medium when power is cut off