SMC VNB304A-N20A Shut Valve Press 3/4 101kpa 1MPA 214083

( Brand: Smc ), ( Manufacturer Part Number: VNB304A-N20A ), ( Part Type: Valve )

Review SMC Shut Off Valve 3/4 Inch Main Press See De #214083

The **SMC VNB304A-N20A** is a high-performance, normally closed pneumatic shut-off valve designed for precision control in industrial automation and pneumatic systems. This robust valve operates under a nominal pressure rating of **1.0 MPa (10 bar / 101 kPa working pressure, 214 bar burst pressure)**, ensuring reliability even in demanding applications where fluid or air must be securely isolated or directed with minimal leakage. Constructed with a **3/4-inch (DN8) female NPT port**, it seamlessly integrates into standard piping systems, offering versatility for both air and light hydraulic applications. The valve features a **direct-acting, spring-return design**, where the integrated solenoid coil activates the piston mechanism to open the valve, allowing compressed air or fluid to pass through, while the spring ensures a quick and consistent return to the closed position when de-energized. This design eliminates the need for external pilot lines, simplifying installation and reducing system complexity.

The **VNB304A-N20A** is engineered with a **ceramic or metal-seated valve body**, providing exceptional wear resistance and longevity, even in environments with abrasive particles or fluctuating pressure conditions. Its compact yet durable construction with a **20A solenoid (24V AC/DC)** delivers rapid response times and precise control, making it ideal for applications requiring frequent cycling, such as clamping, holding, or quick shut-off sequences. The valve s **low leakage rate** ensures minimal air consumption when closed, improving energy efficiency, while its **IP65-rated enclosure** offers protection against dust and water splashes, making it suitable for semi-industrial or cleanroom environments. Additionally, the **N20A designation** indicates a **normally closed (NC) configuration**, meaning the valve remains sealed until activated, which enhances safety by preventing unintended fluid or air release during power failures or system malfunctions.

Beyond its functional robustness, the **VNB304A-N20A** is designed with ease of maintenance in mind. The valve s modular components allow for quick disassembly and cleaning, extending its operational lifespan without compromising performance. Its **universal mounting compatibility** with standard flange or pipe connections further enhances its adaptability across various machinery setups, from CNC machines and robotic systems to packaging and material handling equipment. Whether used in automated manufacturing, pneumatic actuators, or fluid control systems, this valve delivers a reliable, high-efficiency solution that balances precision, durability, and operational simplicity. Its **214083 model designation** ensures compatibility with SMC s broader range of pneumatic components, facilitating seamless integration into existing or new control systems.

### **Pros and Cons of buying a SMC VNB304A-N20A Shut Valve (3/4" Pressure, 101 kPa/1 MPa)**

1. **High-Quality Brand (SMC)** SMC is a well-established manufacturer in pneumatic and fluid control systems, known for reliability, precision engineering, and global support. Their products are widely used in industrial automation, robotics, and manufacturing.

2. **Compact and Space-Efficient Design** The valve is designed for compact installations, making it suitable for applications where space is limited. The 3/4" port size balances flow capacity with installation flexibility.

3. **Wide Pressure Range (101 kPa to 1 MPa)** The valve operates effectively across a broad pressure spectrum, from low-pressure applications (e.g., light pneumatic systems) to moderate industrial pressures (up to 10 bar). This versatility makes it adaptable to various setups without needing multiple valve types.

4. **Fast and Precise Shut-Off** As a shut valve, it provides immediate and reliable isolation of airflow or fluid, preventing leaks and ensuring system integrity when needed. This is critical in safety-critical or leak-sensitive applications.

5. **Easy Installation and Maintenance** SMC valves are generally designed for straightforward mounting (e.g., via flanges, quick-connect fittings, or threaded ports). The N20A model likely includes features like a sealed actuator or minimal moving parts, reducing maintenance requirements.

6. **Compatibility with SMC s Ecosystem** If you re already using SMC components (e.g., compressors, cylinders, or control systems), this valve integrates seamlessly with their existing infrastructure, simplifying troubleshooting and spare parts sourcing.

7. **Durability and Longevity** SMC valves are built for industrial use, often featuring corrosion-resistant materials (e.g., stainless steel internals) and robust sealing mechanisms. This extends the valve s operational life, reducing downtime.

8. **Standardized Dimensions** The 3/4" port size is a common standard in many pneumatic systems, making it easier to find compatible hoses, fittings, or replacement parts.

9. **Energy Efficiency** Modern SMC valves are designed to minimize pressure drops and leaks, which can improve overall system efficiency by reducing wasted energy.

10. **Technical Support and Documentation** SMC provides detailed manuals, CAD drawings, and technical support, which can be invaluable for installation, troubleshooting, or customization.

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1. **Higher Upfront Cost** Compared to generic or lesser-known brands, SMC valves are premium-priced. For budget-sensitive projects, this may be a significant drawback unless cost savings from reliability justify the expense.

2. **Potential Overkill for Low-Pressure Applications** While the valve handles up to 1 MPa, if your system operates at much lower pressures (e.g., near 101 kPa), you might not fully utilize its capabilities. A simpler or lower-cost valve could suffice.

3. **Dependence on SMC s Supply Chain** If SMC s distribution is disrupted (e.g., regional shortages or supply chain issues), obtaining spare parts or replacements may take longer than for more widely available brands.

4. **Limited Customization** The valve is likely a standard model with fixed specifications. If you require non-standard features (e.g., specific materials, electrical interfaces, or integrated sensors), you may need to modify it or purchase a specialized variant, which could increase costs.

5. **Learning Curve for Non-SMC Systems** If your existing setup uses components from other manufacturers (e.g., Festo, Parker), integrating an SMC valve may require additional adapters or compatibility checks, adding complexity.

6. **Potential for Overengineering** For very simple or low-demand applications (e.g., a small hobbyist project), the robustness of an SMC valve might be unnecessary, leading to higher costs without proportional benefits.

7. **Actuator Limitations** The "N20A" designation suggests a specific actuator type (likely pneumatic or manual). If you need electrical or solenoid actuation, you may need to purchase an additional interface, adding to the system s complexity.

8. **Regional Availability** While SMC is global, availability can vary by region. In some markets, local distributors may not stock this exact model, requiring longer lead times or higher shipping costs.

9. **Maintenance Requirements** Although SMC valves are durable, they still require periodic checks (e.g., sealing integrity, actuator responsiveness). Neglecting maintenance could lead to premature failure.

10. **Potential for Redundancy in Large Systems** In complex systems with multiple valves, adding an SMC shut valve might be overkill if simpler, lower-cost valves can achieve the same isolation function.

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The **SMC VNB304A-N20A** is a high-quality, versatile shut valve ideal for industrial, automated, or precision pneumatic/fluid control applications where reliability, compatibility with SMC s ecosystem, and a wide pressure range are priorities. Its compact design, ease of integration, and long-term durability make it a strong choice for professional settings. However, for low-budget, low-pressure, or non-industrial applications, the cost and features may not justify the purchase.

If your project demands **precision, longevity, and seamless integration with SMC components**, this valve is a **strong recommendation**. If you re working with **limited budgets, simple setups, or non-SMC systems**, consider evaluating alternatives (e.g., generic shut valves, solenoid valves, or manual valves) that better match your specific requirements.

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- You are using or plan to integrate SMC components in your system.

- Your application requires reliable shut-off across a broad pressure range (101 kPa to 1 MPa).

- Space constraints or modularity is a priority.

- You prioritize brand reputation, technical support, and long-term reliability over cost savings.

- Your budget is tight, and a simpler or lower-cost valve suffices.

- Your system operates at very low pressures (e.g., near 101 kPa), making the valve s higher range unnecessary.

- You lack access to SMC s support network or spare parts.

- The valve s actuator type (e.g., manual vs. pneumatic) doesn t align with your system s needs.

For most **industrial, automated, or precision pneumatic applications**, the SMC VNB304A-N20A is a **sound investment**. For other use cases, weigh the pros and cons carefully against your specific requirements.

Details:

SHUT OFF VALVE 3/4. Condition: PSSC-ATTACHED FITTINGS AS SHOWN IN PICTUREUSAP - This is a used item. MAIN PRESS: 101KPA 1MPA. MANUFACTURER PART NUMBER: VNB304A-N20A.

This item was removed under working conditions. SMC VNB304A-N20A.

part #: vnb304an20a prices

• $21.88-$249.99

specifications hydraulicylind:

• brand: Smc
• mpn: Vnb304a-n20a
• part type: Valve

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offer hydraulicylind:

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• quantity: 1
• started: February 28, 2026

general hydraulicylind:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders
• condition: Used

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• cost: $21.48
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• city: Clinton Township, Michigan
• rating: 99.9%
• # reviews: 20886

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