What is a direct acting solenoid valve?
Direct acting normally closed solenoid valves actuate the magnet armature with a sealing element directly via the solenoid (they do not need minimum or differential pressure). The valve is sealed by the existing operating pressure, or at low pressure with an additional compression spring (the spring force must be great enough to securely close the valve at an operating pressure of 0 bar). When voltage is applied to the solenoid, the magnet armature is tightened and the valve opens. In doing so, the force of the operating pressure and the closing spring must be overcome.
| Soledoid valve closed: | Solenoid valve open: | Advantages: |
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- No pressure differential required - Function from 0 bar - Less sensitive to contamination - Simple design - Fast switching times |
Direct acting solenoid valves from NieRuf are available here.
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