PK10(3/8")-N-4-AC220V / 2/2 way NC, PA Nylon plastic body

Details of PK10(3/8")-N-4-AC220V / Diaphragm 2/2 way NC, PA Nylon plastic body

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 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 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 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 

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

Advantages of Diaphragm Valves

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

Usage Details

• Potable water systems: Control water in filters and cold water makers.
• Irrigation systems: Open and close water according to schedule.
• Food/Pharmaceutical industries: Used with clean liquids that need precise control.
• Pneumatic systems (compressed air): Control air supply in machinery.
• Home appliances such as washing machines, coffee makers.

Tech Specifications PK10(3/8")-N-4-AC220V / Diaphragm 2/2 way NC, PA Nylon plastic body