Solenoide Valve Model: WD25(1")-N-4-AC220V / Type K Diaphragm 2/2 way NC,NBR Seal,For Water, Air,Gas Liquid

Product Details of Solenoid Valve Model : WD25(1")-N-4-AC220V / Diaphragm Type 2/2 way NC, NBR Seal, For Water, Air, Gas Li

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.

How a Diaphragm Solenoid Valve Works

Main Components

• Solenoid Coil (Electromagnetic Wire Winding): Creates a magnetic field when electric current flows through it.
• Plunger (Moveable 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.

Operating Mode

Normal Closed (NC) – Normally Closed

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

Normal Open (NO) – Normally Open 

• The principle is similar but reversed pressure side → When no electricity, valve is open; when electricity applied, valve closes.

Advantages of Diaphragm Valves

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

Usage Details

• Drinking Water System – Controls water in filtration machines and cold water makers.
• Automatic Irrigation System – Opens and closes water according to schedule.
• Food/Pharmaceutical Industry – Used with clean fluids that need precise control.
• Pneumatic System (Air Compressed) – Controls air supply in machinery.
• Home Appliances – Such as washing machines, coffee makers.

Technical Data Solenoid Valve Model : WD25(1")-N-4-AC220V / Diaphragm 2/2 way NC,NBR Seal,For Water, Air,Gas Li