Solenoid Valve Model: WK25(1")-N-4-D-AC220V - Diaphragm 2/2 way NC, NBR Seal, For Vacuum, Water, Air

Product Details of Solenoid Valve Model: WK25(1")-N-4-D-AC220V/Diaphragm 2/2 way NC, NBR Seal, For Vacuum, Water, Air

The Diaphragm Type Solenoid Valve (Solenoid Valve Diaphragm Type) is a valve that controls the flow of liquids or gases using a diaphragm and solenoid to open and close the valve. It is commonly used in automatic systems such as water supply systems, irrigation systems, compressed air systems, and various industries.

Working Principle of Solenoid Valve Diaphragm Type

Main Components

• Solenoid Coil (Electromagnetic Wire Winding): Creates a magnetic field when electric current flows through it.
• Plunger (Movable Iron Rod): Lifted up/down by the magnetic field.
• Diaphragm (Flexible Rubber/Silicone Sheet): Opens and closes fluid pathways.
• Pilot Port (Pressure Control Port): A small port that helps control pressure on both sides of the diaphragm.

Operation Mode

Normal Closed (NC) – Normally Closed 

• No electricity → Plunger closes pilot port → Pressure on both sides of the diaphragm is equal → Diaphragm keeps valve closed.
• Electricity applied → Plunger lifts up → Opens pilot port → Top pressure on the diaphragm decreases → Fluid from below pushes the diaphragm up → Valve opens.

Normal Open (NO) – Normally Open 

• Similar principle but reversed pressure side → No electricity, valve is open; with electricity applied, valve closes.

Advantages of Diaphragm Valve

• Rapid opening and closing.
• No leakage (as the diaphragm does not wear out like other types).
• Easy maintenance.
• Suitable for clean liquids such as water, air.

Usage Details

• Potable Water System: Controls water in filtration systems and cold water dispensers.
• Irrigation Systems: Opens and closes water according to schedule.
• Food/Pharmaceutical Industry: Used with clean liquids that require precise control.
• Compressed Air (Pneumatic) Systems: Controls air supply in machinery.
• Home Appliances: Such as washing machines, coffee makers.

Tech Specifications Solenoid Valve Model: WK25(1")-N-4-D-AC220V/Diaphragm 2/2 way NC, NBR Seal, For Vacuum, Water, Air