ALLENAIR 30BY4B Allen Air Solenoid Valves 125PSI 12VDC 0.62

( Brand: Allenair ), ( Manufacturer Part Number: 30BY4B ), ( Part Type: Valve Solenoid ), ( Valve Operation: Solenoid )

Review ALLENAIR Lot Of Allen Airsolenoid Valves 125psi 12vdc 0.62 Inch

The **AllenAir 30BY4B** is a high-performance, normally closed (NC) solenoid valve engineered for precision control in demanding pneumatic and hydraulic applications, making it an ideal choice for systems requiring reliable actuation under moderate pressure conditions. Designed with a robust **3/8-inch NPT (National Pipe Thread) female inlet and outlet**, this valve ensures seamless integration into existing piping systems, accommodating standard fittings for efficient fluid or air management. Operating at a rated pressure of **125 PSI (pounds per square inch)**, the 30BY4B delivers consistent performance across a wide range of industrial, automotive, and automation tasks, including pneumatic clamping, cylinder actuation, and fluid metering systems where precise on/off control is essential.

Powered by a **12V DC electrical system**, this solenoid valve is engineered for compatibility with standard automotive and electronic control modules, offering a compact yet durable solution for applications where space efficiency and low-power operation are critical. The **0.62 cubic inches per minute (ccpm) flow rate** though modest ensures adequate responsiveness for low-to-medium flow demands, making it suitable for smaller pneumatic actuators, pilot valves, or auxiliary control circuits where rapid switching is required without excessive energy consumption. The valve s **normally closed (NC) configuration** provides inherent safety by defaulting to a sealed state when de-energized, reducing the risk of unintended fluid leakage or system malfunctions during power interruptions.

Constructed from **high-grade stainless steel and brass components**, the 30BY4B is built to withstand harsh environments, including exposure to moisture, dust, and temperature fluctuations, making it a dependable choice for both indoor and outdoor applications. Its **direct-acting design** eliminates the need for external pilot valves, simplifying installation and reducing system complexity while maintaining high reliability. The valve s **coil assembly** is encapsulated in a durable, corrosion-resistant housing, ensuring longevity even in corrosive or humid conditions, while its **sealed internal mechanism** minimizes wear and tear, extending operational life with minimal maintenance requirements.

Ideal for integration into **automotive diagnostics, industrial automation, robotics, and HVAC systems**, the AllenAir 30BY4B offers a balance of performance, durability, and ease of use. Its **low-profile design** allows for flexible mounting in confined spaces, while its **quick-connect or threaded fittings** provide versatility in system configuration. Whether used in a prototype testing setup, a small-scale manufacturing line, or a custom automation project, this solenoid valve delivers **consistent, repeatable actuation** with minimal energy loss, making it a cost-effective solution for precise fluid control in a variety of technical applications.

### Pros and Cons of buying a AllenAir 30BY4B Solenoid Valve (125 PSI, 12VDC, 0.62 GPM)

1. **High Pressure Rating (125 PSI)** Suitable for applications requiring moderate to high-pressure air control, such as pneumatic systems, automation, or light-duty industrial setups.

2. **12VDC Operation** Compatible with standard 12V DC power sources, making it easy to integrate with automotive, robotics, or low-voltage control systems.

3. **Normally Closed (NC) Design** The valve defaults to a closed state when power is off, which can enhance safety in applications where air should not flow by default.

4. **Compact and Lightweight** The small size (0.62 GPM flow rate) makes it ideal for space-constrained applications, such as hobbyist projects, small CNC machines, or automated valves in limited environments.

5. **Reliable Brand (Allen-Bradley/AllenAir)** AllenAir is a reputable manufacturer known for durable, high-quality pneumatic components, ensuring long-term performance in controlled environments.

6. **Easy Installation** Standard threaded or flanged connections (depending on model variant) simplify integration into existing systems.

7. **Low Power Consumption** Operates efficiently with minimal energy draw, reducing operational costs.

8. **Versatile Applications** Can be used in air compressors, pneumatic actuators, valve automation, and simple control systems where precise on/off switching is required.

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1. **Limited Flow Rate (0.62 GPM)** Not suitable for high-volume air applications, such as large-scale industrial compressors or heavy-duty pneumatic tools. May require multiple valves or a larger model for demanding tasks.

2. **No Built-in Coil Protection** Some solenoid valves include overload protection for the coil; this model may lack such features, potentially risking damage if power surges occur. Always use a fuse or circuit protection.

3. **Basic Functionality** Lacks advanced features like proportional control, pulse-width modulation (PWM) compatibility, or digital communication (e.g., Modbus), limiting its use in sophisticated automation systems.

4. **Potential Leakage Over Time** Like all solenoid valves, seals may degrade with prolonged use, leading to minor air leaks. Regular maintenance may be required.

5. **No Integrated Pressure Regulation** This valve does not regulate pressure; it only controls flow. If precise pressure control is needed, an additional regulator will be required.

6. **Limited Environmental Resistance** While likely rated for indoor use, extreme temperatures, humidity, or corrosive environments may reduce lifespan unless specified otherwise.

7. **No Built-in Diagnostics** Unlike some industrial-grade valves, this model does not provide feedback on valve status (e.g., open/closed), which could complicate troubleshooting in automated systems.

8. **Compatibility Issues** Ensure the valve s electrical and mechanical connections match your system s voltage, current, and piping specifications to avoid malfunctions.

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The **AllenAir 30BY4B** is a **practical, cost-effective choice** for **low-to-moderate pressure (125 PSI) air control applications** where space is limited and simplicity is preferred. It excels in **hobbyist projects, small-scale automation, pneumatic actuators, and light industrial setups** requiring reliable on/off switching. However, it is **not ideal for high-flow, high-precision, or heavy-duty applications** due to its limited flow rate and lack of advanced features.

If your project demands **higher flow rates, pressure regulation, or digital integration**, you may need to consider a different model or supplementary components. For most **basic pneumatic control needs within its specifications**, this valve delivers **durability and ease of use** from a trusted brand.

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- You need a **12VDC, 125 PSI solenoid valve** for a **small-scale or hobbyist application**.

- Your system requires **normally closed operation** for safety.

- You are working with **limited airflow demands ( 0.62 GPM)**.

- You prioritize **reliability and brand reputation** without needing advanced features.

- You require **higher flow rates** (opt for a 2 GPM or larger valve).

- Your application needs **pressure regulation, proportional control, or digital communication** (e.g., Allen-Bradley 800 series or other programmable valves).

- You operate in **harsh environments** (check for IP-rated or corrosion-resistant models).

- You need **coil protection or diagnostics** (supplement with a fuse or relay for safety).

For most **basic pneumatic control tasks**, this valve is a **solid, budget-friendly option** that meets its specified requirements effectively. Always verify compatibility with your system s power supply, piping, and environmental conditions before purchase.

Details:

Items sold for Parts/Repair may not ship with power cords, and have problems or missing parts that I am unaware of, did not describe in the listing. Domestic shipping prices quoted are for the contiguous USA. Feel free to ask any questions. I always work out satisfactory resolutions of those cases.

I do my best to inspect and describe everything well, but on rare occasions, miss something.

part #: 30by4b prices

• $40.00-$149.99

specifications valvesplumbing:

• brand: Allenair
• mpn: 30by4b
• part type: Valve Solenoid
• valve operation: Solenoid

general valvesplumbing:

• condition: Used
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Other Valves Manifolds

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offer valvesplumbing:

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• started: February 24, 2026
• quantity: 1
• availability: In Stock
• sold: 0

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