PD25(1")-5K-AC220V/WITH K PLUG Diaphragm 2/2 way NC, PA Nylon plastic body

Details of PD25(1")-5K-AC220V/WITH K PLUG Diaphragm 2/2way NC, PA Nylon plastic body

The 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 Coil): Creates a magnetic field when electric current flows through it.
• Plunger (Movable Iron Rod): Lifted or lowered 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 closes valve.
• Electricity applied → Plunger is lifted → Pilot port opens → Pressure above the diaphragm decreases → Fluid from below pushes up the diaphragm → 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 valves).
• Easy maintenance.
• Suitable for clean fluids 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 fluids that require precise control.
• Pneumatic systems (compressed air) – Controls air supply in machinery.
• Home appliances such as washing machines, coffee makers.

Tech Data PD25(1")-5K-AC220V/WITH K PLUG Diaphragm 2/2way NC, PA Nylon plastic body