How to Use Solenoid valve 3/2 double coil: Examples, Pinouts, and Specs

The EMC Solenoid Valve 3/2 Double Coil is an electromechanical device designed to control the flow of fluids or gases through three ports. It features two coils for actuation, enabling both normally closed (NC) and normally open (NO) configurations. This versatile valve is widely used in pneumatic and hydraulic systems, industrial automation, and fluid control applications.

• Pneumatic systems for controlling air flow
• Hydraulic systems for fluid direction control
• Industrial automation for process control
• Medical devices requiring precise fluid regulation
• Automotive systems, such as fuel or air control

The solenoid valve has two coils, each with two terminals. The terminals are typically labeled as follows:

Note: Ensure proper polarity when connecting the coils to avoid damage.

1. Power Supply: Select a power supply that matches the operating voltage of the solenoid valve (e.g., 12V DC or 24V DC).
2. Wiring: Connect the positive and negative terminals of each coil to the appropriate power source or control circuit. Use a relay or transistor for switching if controlled by a microcontroller.
3. Fluid Connections:
   • Connect the inlet port to the fluid source.
   • Connect the outlet port to the desired destination.
   • Use the exhaust port for venting (if applicable).
4. Control Logic:
   • Energize Coil A to open the normally closed (NC) path.
   • Energize Coil B to open the normally open (NO) path.
   • De-energize both coils to return the valve to its default state.

• Polarity: Always check the polarity of the power supply to avoid damaging the coils.
• Voltage Rating: Ensure the power supply voltage matches the valve's rated voltage.
• Pressure Range: Operate the valve within the specified pressure range to prevent leaks or damage.
• Mounting: Install the valve in a stable position to avoid vibration or misalignment.
• Maintenance: Periodically clean the valve and check for debris or wear.

The solenoid valve can be controlled using an Arduino UNO and a relay module. Below is an example circuit and code:

• Connect the positive terminal of Coil A to the relay's NO (Normally Open) terminal.
• Connect the relay's COM (Common) terminal to the power supply's positive terminal.
• Connect the negative terminal of Coil A to the power supply's ground.
• Repeat the same for Coil B using a second relay.

// Define relay control pins
const int relayA = 7; // Relay controlling Coil A
const int relayB = 8; // Relay controlling Coil B

void setup() {
  // Set relay pins as outputs
  pinMode(relayA, OUTPUT);
  pinMode(relayB, OUTPUT);

  // Initialize relays to OFF state
  digitalWrite(relayA, LOW);
  digitalWrite(relayB, LOW);
}

void loop() {
  // Example: Energize Coil A for 2 seconds
  digitalWrite(relayA, HIGH); // Activate Coil A
  delay(2000);                // Wait for 2 seconds
  digitalWrite(relayA, LOW);  // Deactivate Coil A

  // Example: Energize Coil B for 2 seconds
  digitalWrite(relayB, HIGH); // Activate Coil B
  delay(2000);                // Wait for 2 seconds
  digitalWrite(relayB, LOW);  // Deactivate Coil B

  // Wait for 1 second before repeating
  delay(1000);
}

Note: Use a flyback diode across each coil to protect the circuit from voltage spikes when the coils are de-energized.

1. Can this valve handle liquids?

   • Yes, but it is primarily designed for air, inert gases, or light oils. Ensure compatibility with the fluid type.

2. What happens if both coils are energized simultaneously?

   • This is not recommended as it may cause erratic behavior or damage the valve. Always energize one coil at a time.

3. Can the valve operate in extreme temperatures?

   • The valve is rated for temperatures between -10°C and 50°C. Operating outside this range may affect performance.

4. How do I clean the valve?

   • Disconnect the valve from the system, disassemble it if necessary, and clean the ports with compressed air or a suitable solvent.

By following this documentation, users can effectively integrate and maintain the EMC Solenoid Valve 3/2 Double Coil in their systems.