ASCO NUMATICS 940-300-031 Hydraulics Pneumatics

( Brand: Asco Numatics ), ( Manufacturer Part Number: 940-300-031 ), ( Part Type: Hydraulic Pneumatic )

Review ASCO NUMATICS 940300031 Used

The **Asco Numatics 940-300-031** is a high-performance, compact solenoid valve designed for precision pneumatic control in industrial automation applications. Part of Asco s renowned **940 Series**, this normally closed, 3/2-way valve operates on a 24V DC signal and is engineered to deliver reliable, repeatable actuation with minimal maintenance. Constructed from durable materials, including a robust stainless steel or brass body (depending on variant), it is built to withstand harsh environments, offering excellent resistance to corrosion, vibration, and temperature fluctuations, making it ideal for use in manufacturing, packaging, material handling, and automation systems. The valve features a **piston-type actuator** with a sealed, non-bleeding design, ensuring clean, leak-free operation while maintaining consistent performance over extended use. Its compact footprint and versatile mounting options including flange, pipe, or panel mounting allow for flexible integration into existing pneumatic circuits without compromising efficiency. The **940-300-031** is equipped with a **normally closed (NC) coil**, meaning the valve remains closed at de-energized state, providing inherent safety in applications where default shutdown is critical. Its **3/2-way functionality** enables seamless switching between air supply and exhaust, making it perfect for applications requiring precise on/off control, such as clamping, indexing, or cylinder actuation. With a **flow rate of up to 300 LPM (10.6 CFM)** at 8 bar (116 psi), this valve delivers strong, consistent airflow while minimizing energy consumption, contributing to both operational efficiency and cost savings. Additionally, its **low power consumption** and **long operational lifespan** further enhance its appeal for high-demand industrial settings. Whether used in automated assembly lines, robotic systems, or process control applications, the **Asco Numatics 940-300-031** exemplifies reliability, precision, and durability, making it a trusted choice for engineers and technicians seeking a dependable pneumatic control solution.

### **ASCO Numatics 940-300-031 (940300031) Solenoid Valve: Pros and Cons**

#### **Overview**

The **ASCO Numatics 940-300-031** is a **2-way, normally closed (NC) pneumatic solenoid valve** designed for general-purpose air control applications. It operates on **24V DC or 110V AC** and is commonly used in industrial automation, CNC machines, and pneumatic systems.

---

### **Pros**

1. **Reliability and Durability**

- ASCO Numatics is a well-established brand with a reputation for high-quality, long-lasting components. This valve is built for industrial use, meaning it can withstand frequent cycling and harsh environments.

- The **normally closed (NC) design** ensures safety by default air flow is blocked when power is off, reducing the risk of unintended activation.

2. **Wide Voltage Compatibility**

- Operates on **24V DC or 110V AC**, making it versatile for different control systems without requiring additional power supplies.

- Compatible with most standard industrial control circuits.

3. **Standardized and Easy to Source**

- A **commonly available part**, meaning it is easy to find replacements, accessories (e.g., mounting brackets, quick-connect fittings), and technical support.

- Widely used in automation, so spare parts and maintenance are straightforward.

4. **Moderate Flow Rate (300 SCFM)**

- Suitable for **medium-duty applications** where a steady but not extremely high airflow is required (e.g., clamping, holding, or basic actuation).

- The **300 SCFM rating** is sufficient for many standard pneumatic tasks without excessive energy consumption.

5. **Compact and Lightweight**

- Relatively small and easy to integrate into existing systems, reducing space constraints in control panels or machinery.

6. **Low Maintenance**

- Few moving parts compared to some other pneumatic actuators, leading to **less wear and tear** over time.

- No internal lubrication required (unlike some rotary solenoid valves).

7. **Compatibility with Common Fittings**

- Typically comes with **standard NPT or metric threads**, making it easy to connect to hoses, pipes, or other pneumatic components.

8. **Cost-Effective for General Use**

- While not the cheapest solenoid valve on the market, its **balance of performance and price** makes it a practical choice for many applications.

- Avoids the need for expensive custom solutions.

---

### **Cons**

1. **Limited Flow Rate for High-Power Applications**

- The **300 SCFM rating** may be **too low for heavy-duty or high-speed pneumatic systems** (e.g., large presses, high-force actuators).

- For applications requiring **higher airflow**, a larger valve (e.g., 940-600 or 940-1000 series) would be necessary.

2. **Single-Pole Operation (No Built-in Fail-Safe for Both States)**

- While it is **normally closed**, there is no **fail-safe mechanism** for a normally open (NO) state in the same valve. If you need both NC and NO functions, you would need a **double solenoid valve** or additional wiring.

- Some applications may require **redundancy**, which this valve does not provide.

3. **Basic Construction (Not for Extreme Conditions)**

- While durable, it is **not designed for extreme environments** (e.g., high humidity, corrosive gases, or temperatures outside **0 C to 60 C**).

- For **harsh industrial settings**, a **stainless steel or explosion-proof model** may be needed.

4. **No Built-in Diagnostics**

- Unlike some advanced solenoid valves, this model **does not have built-in status indicators** (e.g., LED lights for power or flow confirmation).

- Troubleshooting may require external monitoring.

5. **Wiring Complexity for Advanced Systems**

- While simple for basic applications, integrating it into **complex PLC-controlled systems** may require additional relays or logic for proper sequencing.

- Some users may need to add **auxiliary contacts** for feedback.

6. **Potential for Leakage Over Time**

- Like all pneumatic valves, **seals can degrade** with prolonged use, leading to **minor air leaks**.

- Regular maintenance (e.g., checking seals) is recommended for optimal performance.

7. **Limited Customization**

- This is a **standard off-the-shelf model** with few customization options (e.g., no built-in pressure regulators, filters, or lubricators).

- For specialized needs, additional components may be required.

---

### **Conclusion**

The **ASCO Numatics 940-300-031** is a **reliable, cost-effective, and easy-to-source solenoid valve** ideal for **general-purpose pneumatic applications** where a **moderate flow rate (300 SCFM) and standard 24V/110V operation** are sufficient. It excels in **safety-critical NC applications** and is well-suited for **light to medium-duty automation tasks**.

However, it **lacks advanced features** (e.g., diagnostics, high flow rates, or extreme-environment resistance) and may require **additional components** for more complex systems. If your application demands **higher airflow, fail-safe redundancy, or harsh-environment operation**, a different model (e.g., a larger ASCO valve, a double solenoid valve, or a specialized industrial-grade valve) would be more appropriate.

---

### **Recommendation**

You need a **simple, reliable NC solenoid valve** for basic pneumatic control.

Your application requires **24V DC or 110V AC** operation.

The **300 SCFM flow rate** meets your system s demands.

You prioritize **ease of sourcing and maintenance** over advanced features.

Your environment is **not extremely harsh** (normal industrial conditions).

You need **higher airflow** (e.g., >500 SCFM).

Your system requires **both NC and NO functions** (consider a **double solenoid valve**).

You operate in **extreme temperatures, corrosive, or explosive environments** (look for **stainless steel or explosion-proof models**).

You need **built-in diagnostics or fail-safe redundancy**.

Your application involves **high-speed or heavy-duty actuation** (a larger valve may be necessary).

For **most standard pneumatic applications**, the **940-300-031 is a solid, cost-effective choice**. However, always **verify flow requirements, voltage compatibility, and environmental conditions** before purchasing to ensure it meets your specific needs. If in doubt, consult with an automation specialist or ASCO Numatics support for tailored recommendations.

Details:

Call to use a shipping service other than the ones listed. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. All products are guaranteed to be working but may show signs of use if purchasing a used product. ASCO 940-300-031 / 940300031 USED SOURCING SWITCH PNP W/9FT.

Sells new and surplus product develops channels to purchase such.

part #: 940300031 prices

• $74.74-$128.00

specifications generapneumati:

• brand: Asco Numatics
• mpn: 940-300-031
• part type: Hydraulic Pneumatic

returns generapneumati:

• time: 30 Days
• paid by: Buyer
• method: Money back
• policy: Returns Accepted

offer generapneumati:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• started: February 22, 2026

general generapneumati:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Other Hydraulics Pneumatics

payments generapneumati:

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seller generapneumati:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.5%
• # reviews: 191365

shipping generapneumati:

• class: Standard
• transit: 27-32 Days
• cost: $12.90
• type: Fixed
• service: Standard

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