Solenoid valve is an electrically operated valve that controls the flow of liquid or gas automatically using a solenoid coil.

Key Features:

1. Design:

Solenoid Coil: An electromagnet that moves the valve plunger when energized.

Valve Body: Contains the inlet, outlet, and flow passage.

Plunger/Spool: Opens or closes the flow path when the solenoid is activated.

2. Operation Types:

Direct Acting: Solenoid directly opens/closes the valve. Used for small flow or low pressure.

Pilot Operated (Indirect): Uses system pressure to open/close, suitable for larger flow or higher pressure.

Normally Open (NO) or Normally Closed (NC):

NC: Valve stays closed without power.

NO: Valve stays open without power.

3. Materials:

Body: Brass, stainless steel, plastic (PVC) depending on media.

Seals: NBR, EPDM, PTFE depending on fluid compatibility.

4. Voltage & Power:

Commonly 12V DC, 24V DC, 24V AC, 110V AC, 220V AC.

5. Connection Types:

Threaded, flanged, or welded ends.

6. Pressure & Temperature:

Pressure: 0–16 bar (low to medium) for standard types, higher for special valves.

Temperature: depends on seal and body material.

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Uses in Industry

1. Water Treatment & Plumbing:

Automatic control of water flow in pipelines, tanks, and irrigation.

2. HVAC / Cooling Systems:

Controls refrigerant or chilled water in air conditioning and cooling systems.

3. Chemical & Pharmaceutical Industry:

Handles acids, solvents, and chemical dosing systems.

Used in automated process control systems.

4. Oil & Gas Industry:

Fuel and gas flow control in pipelines and equipment.

5. Food & Beverage Industry:

Controls liquid ingredients in bottling and processing.

6. Automation & Industrial Machinery:

Common in pneumatic systems, hydraulic systems, and automated equipment.

Enables remote or automated flow control.

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✅ Advantages:

Quick and precise operation.

Can be automated and integrated into control systems.

Compact and lightweight.

Suitable for liquids, gases, and even steam (depending on design).