4 Zone Pre-assembled Rack Kit 113 with 4 RN 155 9VDC Solenoid Valves

In a solenoid valve, the diaphragm is a crucial component that acts as a barrier between the control mechanism (electrical coil) and the fluid being controlled (water, air, etc.). It has two main functions:

Sealing: The diaphragm separates the pressurised fluid from the electrical components of the valve. This prevents water damage to the coil and ensures a safe electrical operation.

Controlling Flow: The diaphragm moves based on the energising or de-energising of the solenoid coil. When energised, the coil creates a magnetic field that pulls the diaphragm open, allowing fluid to flow through the valve. Conversely, when de-energised, the magnetic field collapses, and a spring or fluid pressure pushes the diaphragm back to its closed position, stopping the flow.