GD20(3/4")-N-3-DC24V NC Diaphragm 2/2 way, NBR Seal

Details of GD20(3/4")-N-3-DC24V/Diaphragm 2/2 way NC, NBR Seal

The Diaphragm 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 Diaphragm Solenoid Valve

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.

Operating Mode

Normal Closed (NC) – Normally Closed

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

Normal Open (NO) – Normally Open

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

Advantages of Diaphragm Valve

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

Usage Details

• Potable water system – Controls water in filters and cold water makers.
• Irrigation systems – Opens and closes water according to schedule.
• Food/Pharmaceutical Industry – Used with clean liquids that need precise control.
• Pneumatic Systems (Compressed Air) – Controls air supply in machinery.
• Home appliances such as washing machines, coffee makers.

Tech Data GD20(3/4")-N-3-DC24V/Diaphragm 2/2 way NC, NBR Seal