SMC AF40-N04-2Z Box

( Brand: Smc ), ( Manufacturer Part Number: AF40-N04-2Z ), ( Part Type: Box )

Review SMC Af40n042z New No Box

The **SMC AF40-N04-2Z (AF40N042Z)** is a high-performance, compact pneumatic solenoid valve designed for precision control in industrial automation, manufacturing, and fluid handling applications. Part of SMC s advanced AF40 series, this normally closed (NC) valve features a robust, corrosion-resistant construction optimized for reliable operation in demanding environments. With a 4-way, 2-position design, it seamlessly integrates into pneumatic circuits to regulate air flow with exceptional accuracy, making it ideal for tasks such as clamping, positioning, or actuating cylinders in assembly lines, packaging systems, or material handling equipment. The valve operates on a 24V DC signal, ensuring compatibility with standard control systems while delivering consistent performance under varying load conditions. Its compact, modular housing not only saves valuable space in tight installations but also simplifies wiring and maintenance, thanks to a streamlined design that minimizes potential points of failure. The AF40-N04-2Z incorporates SMC s proprietary sealing technology, which enhances durability and reduces wear over extended use, while its integrated magnetic coil provides quick response times and energy efficiency. Whether deployed in a cleanroom environment or a high-dust industrial setting, this valve s sealed construction and robust materials including stainless steel and high-grade polymers ensure resistance to contamination, moisture, and temperature fluctuations, maintaining operational integrity even in harsh conditions. Perfect for applications requiring precise, repeatable control, the AF40-N04-2Z exemplifies SMC s commitment to innovation and engineering excellence, delivering a balance of performance, reliability, and ease of integration for modern automation solutions.

The **SMC AF40-N04-2Z (AF40N042Z)** is a compact, normally closed (NC) solenoid valve commonly used in pneumatic control systems, particularly for applications requiring precise air flow regulation. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the SMC AF40-N04-2Z**

1. **Compact and Lightweight Design**

The valve is small and easy to integrate into tight spaces, making it suitable for applications where space is limited. Its compact size also reduces installation complexity.

2. **Normally Closed (NC) Operation**

The valve is NC by default, meaning it blocks airflow when de-energized. This is safer in many applications because it prevents unintended air release, reducing the risk of accidents or damage to downstream components.

3. **High Reliability and Durability**

SMC is a well-established brand known for producing robust pneumatic components. The AF40 series is designed for industrial use, offering long service life with minimal maintenance. The valve is built to withstand frequent cycling without significant wear.

4. **Low Power Consumption**

The solenoid operates efficiently, consuming minimal electrical power, which is beneficial for cost savings and energy efficiency in automated systems.

5. **Quick Response Time**

The valve provides fast actuation, allowing for rapid changes in airflow. This is advantageous in applications requiring precise timing or high-speed operations.

6. **Compatibility with SMC s Ecosystem**

The AF40 series is part of SMC s modular pneumatic system, meaning it can easily integrate with other SMC components like regulators, filters, and actuators. This compatibility simplifies system design and reduces the need for third-party parts.

7. **Low Noise Operation**

SMC valves are generally designed to minimize noise, which is important in environments where quiet operation is preferred (e.g., laboratories, cleanrooms, or office automation).

8. **Easy Installation and Maintenance**

The valve features standard mounting options (e.g., flange or pipe connections) and is designed for straightforward installation. Maintenance is minimal, typically requiring only periodic checks for leaks or wear.

9. **Wide Operating Pressure Range**

The valve can handle a broad range of operating pressures (typically up to 10 bar or 145 psi, depending on the exact model and configuration), making it versatile for various pneumatic applications.

10. **CE and Other Certifications**

SMC products often comply with international standards (e.g., CE, RoHS), ensuring they meet regulatory requirements for safety and environmental compliance in many markets.

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### **Cons of the SMC AF40-N04-2Z**

1. **Limited Flow Rate**

The AF40 series is designed for low-to-medium flow applications. For high-flow systems (e.g., large pneumatic cylinders or heavy-duty actuators), a larger valve (e.g., AF60 or AF80 series) may be more appropriate. The AF40-N04-2Z has a nominal flow rate of 40 L/min (at 6 bar), which may be insufficient for demanding applications.

2. **Higher Upfront Cost Compared to Basic Valves**

While SMC valves are reliable, they are generally more expensive than basic or generic solenoid valves from less established brands. For budget-conscious projects, this could be a drawback unless long-term reliability justifies the cost.

3. **Dependence on SMC s Proprietary System**

If you are not using other SMC components, you may need adapters or additional fittings to integrate the valve with non-SMC parts. This can add complexity and cost to the system.

4. **Limited Customization Options**

The AF40 series offers limited variations in terms of mounting, electrical connections, or additional features (e.g., position feedback). If you require specialized options (e.g., different voltage inputs, built-in pressure switches), you may need to explore other models or brands.

5. **Potential for Leakage Over Time**

Like all solenoid valves, the AF40-N04-2Z can develop minor leaks over extended use, especially if not properly maintained. While SMC valves are durable, regular inspections are recommended to ensure optimal performance.

6. **Electrical Requirements**

The valve typically requires a specific voltage (e.g., 24V DC or 110V AC, depending on the model). Mismatched voltage can damage the solenoid or cause unreliable operation. Ensure your power supply matches the valve s requirements.

7. **No Built-in Pressure Regulation**

The AF40-N04-2Z is a basic solenoid valve and does not include pressure regulation features. If your application requires precise pressure control, you will need to pair it with an external regulator (e.g., SMC s ER series).

8. **Limited Environmental Resistance**

While the valve is designed for industrial use, extreme environments (e.g., high humidity, dust, or corrosive atmospheres) may require additional protection (e.g., enclosures or filters). SMC offers some weatherproof models, but the AF40-N04-2Z may not be suitable for harsh outdoor conditions without modifications.

9. **Training and Technical Support Dependency**

SMC valves are optimized for performance but may require technical knowledge to install and troubleshoot. If your team lacks experience with pneumatic systems, setup or repairs could be challenging without proper training or support.

10. **Lead Times for Replacement Parts**

Like many specialized components, replacement parts or entire valves may have longer lead times, especially if ordering from a distributor rather than directly from SMC. This could cause delays in maintenance or repairs.

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### **Conclusion**

The **SMC AF40-N04-2Z** is an excellent choice for applications requiring a **reliable, compact, and normally closed solenoid valve** in low-to-medium flow pneumatic systems. Its strengths lie in its **durability, safety (NC operation), compatibility with SMC s ecosystem, and low maintenance requirements**. It is particularly well-suited for:

- Light industrial automation (e.g., clamping, positioning).

- Laboratory or cleanroom applications where noise and reliability are critical.

- Systems where space constraints demand a small valve.

- Projects where long-term reliability and brand support are priorities.

- **High flow rates** (consider larger SMC valves like AF60 or AF80).

- **Budget-friendly alternatives** (generic valves may suffice for simple applications).

- **Custom electrical or mounting options** (other brands or models may offer more flexibility).

- **Extreme environmental conditions** (weatherproof or heavy-duty models may be necessary).

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### **Recommendation**

- Your application requires a **small, reliable, NC solenoid valve** for pneumatic control.

- You are already using or plan to integrate **SMC s pneumatic components** (e.g., regulators, filters).

- The **flow rate requirements are within the valve s capacity (up to 40 L/min at 6 bar)**.

- You prioritize **long-term durability, low maintenance, and safety** over cost savings.

- Your system operates in a **moderate environment** (not extreme temperatures, high humidity, or corrosive conditions).

- You need **higher flow rates** (upgrade to AF60 or AF80 series).

- You are working with a **tight budget** and can accept a less established brand.

- Your application requires **custom electrical inputs, position feedback, or advanced features** (e.g., proportional control).

- The valve will be exposed to **harsh environmental conditions** (evaluate SMC s weatherproof models or other brands like Festo or ASCO).

- You need **faster response times or lower latency** (some specialized valves may offer better performance).

For most **standard pneumatic control applications** where reliability and compatibility are key, the **SMC AF40-N04-2Z is a solid and recommended choice**. Always verify the exact specifications (e.g., voltage, pressure, flow) with your project requirements before purchasing.

Details:

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. The product is used surplus. Call to use a shipping service other than the ones listed. SMC AF40-N04-2Z / AF40N042Z NEW NO BOX DISCONTINUED BY MANUFACTURER, FILTER, AF MASS PRO 1/2 MODULAR NPT ;.

All products are guaranteed to be working but may show signs of use.

part #: af40n042z prices

• $35.72-$95.00

specifications hydraulivalv:

• brand: Smc
• mpn: Af40-n04-2z
• part type: Box

seller hydraulivalv:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.5%
• # reviews: 189568

shipping hydraulivalv:

• cost: $12.90
• service: Standard
• type: Fixed
• class: Standard
• transit: 3-9 Days

returns hydraulivalv:

• time: 30 Days
• policy: Returns Accepted
• method: Money back
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general hydraulivalv:

• Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Filters Cartridges > Hydraulic Filters
• condition: New Open box

offer hydraulivalv:

• started: February 10, 2026
• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock

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