The **SVF-4W2-R** is a specific model of a **Direct-Acting 2-Port Solenoid Valve**, typically used for controlling the flow of fluids (liquids or gases) in automation and industrial machinery. --- ### 1. Key Technical Specifications Below is a breakdown of the typical electronic and mechanical characteristics of the SVF-4W2-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Solenoid Valve (Direct Acting) | | **Configuration** | 2-Way, 2-Position (Normally Closed) | | **Operating Voltage** | Usually AC 110V/220V or DC 24V (depending on coil variant) | | **Orifice Size** | Approx. 4.0 mm | | **Connection Port** | 1/4" PT or NPT | | **Pressure Range** | 0 to 7 kgf/cm² (0 - 0.7 MPa) | | **Body Material** | Brass or Stainless Steel | --- ### 2. Electronic Components & Working Principle The "electronic" aspect of this device is centered around the **Solenoid Actuator**. Here is how the parts interact: #### A. The Solenoid Coil * **Copper Winding:** A spool of fine copper wire that generates a magnetic field when energized. * **Power Consumption:** Designed for continuous duty (ED 100%), meaning it can stay energized for long periods without overheating. * **Insulation Class:** Usually Class F or H, allowing for high-temperature resistance. #### B. The Plunger (Armature) * A ferromagnetic rod located inside the coil. * When electricity flows through the coil, the magnetic field pulls the plunger upward, overcoming the spring tension to open the valve orifice. #### C. Electrical Connection (DIN Connector) * The valve typically features a **DIN 43650** plug. * It often includes an integrated **LED indicator** to show when the coil is receiving power. * Some versions include a **Varistor (MOV)** for surge protection to prevent back-EMF from damaging the controlling PLC or relay. --- ### 3. Application Use Cases The SVF-4W2-R is commonly found in the following systems: 1. **Pneumatic Control:** Controlling air cylinders or air-driven tools. 2. **Water Systems:** Automated shut-off for small-scale irrigation or cooling lines. 3. **Vacuum Systems:** Because it is "Direct Acting," it does not require a minimum pressure differential to operate, making it suitable for low-pressure or vacuum applications. ---