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  3. MAXON 075SMA21-AB12-BB12A0

MAXON 075SMA21-AB12-BB12A0 Normally Vent Valve Npt 115V-AC 3/4

075sma21-ab12-bb12a0 Maxon Normally Open Vent Valve 115v-ac 3/4 Npt

( Brand: Maxon ), ( Manufacturer Part Number: 075SMA21-AB12-BB12A0 ), ( Part Type: Valve Vent ), ( Voltage: Ac ), ( Reference Sku: 1766608 ), ( Product Condition: Used Excellent )

Review MAXON Normally Open Vent Valve 115v-ac 3/4 Npt

The **MAXON 075SMA21-AB12-BB12A0** is a high-performance, normally vented solenoid valve designed for precise control in industrial, commercial, and HVAC applications where reliability and efficiency are paramount. This valve operates on a **115V AC** power supply, delivering consistent and dependable performance in environments where air or gas must be regulated with accuracy. The **3/4 NPT** female threaded connection ensures a secure, leak-proof fit, making it ideal for integration into existing piping systems without the need for additional adapters or fittings. As a normally vented valve, it remains open when de-energized, allowing air or gas to flow freely until activated, which simplifies system design by eliminating the need for additional bypass mechanisms or manual overrides.

Constructed with durable materials, the MAXON 075SMA21-AB12-BB12A0 is built to withstand the demands of continuous operation, offering long-term durability in both clean and mildly corrosive environments. Its robust coil winding and reinforced housing resist thermal stress, ensuring stable performance even under fluctuating load conditions. The valve s compact yet sturdy design allows for easy installation in tight spaces, making it a versatile choice for applications ranging from small-scale ventilation systems to larger-scale industrial processes. Whether used in climate control, exhaust management, or pneumatic control systems, this valve provides smooth, silent operation with minimal maintenance requirements, reducing downtime and operational costs.

Engineered for precision, the MAXON 075SMA21-AB12-BB12A0 features a direct-acting solenoid mechanism that delivers rapid response times, ensuring quick and reliable actuation when power is applied. Its sealed internal components protect against contamination, dust, and moisture, making it suitable for both indoor and outdoor installations where environmental factors could otherwise compromise performance. The valve s normally vented configuration also enhances safety by preventing unintended pressure buildup, as it defaults to an open state when power is lost. This design consideration is particularly valuable in applications where system integrity and fail-safe operation are critical. Overall, the MAXON 075SMA21-AB12-BB12A0 represents a dependable, high-efficiency solution for professionals seeking a reliable, low-maintenance valve for their air or gas control needs.

### **Pros and Cons of buying a Maxon 075SMA21-AB12-BB12A0 (Normally Vent Valve, 115V AC, 3/4 NPT)**

#### **Pros:**

1. **Reliable Brand Reputation** Maxon is a well-established manufacturer known for producing high-quality control valves, particularly in industrial and HVAC applications. Their products are often durable and built to last with proper maintenance.

2. **Direct-Acting Solenoid Design** This valve uses a direct-acting solenoid, which means it can operate without external pilot pressure, making it suitable for low-pressure systems. This simplifies installation and reduces dependency on auxiliary components.

3. **Normally Vent (Fail-Safe) Operation** The valve is designed to vent (open) when power is lost, which is a critical safety feature in applications where a failure should not trap pressure or fluid. This is particularly useful in systems where safety compliance (e.g., OSHA, ASME) is required.

4. **115V AC Power Supply** The valve operates on standard single-phase power, making it easy to integrate into existing electrical systems without requiring specialized power sources.

5. **3/4 NPT Threading** The 3/4-inch NPT (National Pipe Thread) connection is a common standard in plumbing and HVAC systems, ensuring compatibility with a wide range of pipes and fittings. This reduces the need for adapters or custom fittings.

6. **Compact and Modular Design** The valve s compact size makes it suitable for installations where space is limited. Its modular design may also allow for easier replacement or integration into existing control panels.

7. **Potential for Remote Control** The solenoid can be controlled via electrical signals, enabling automation, sequencing, or integration with PLCs (Programmable Logic Controllers) for more complex system management.

8. **Wide Application Range** This type of valve is commonly used in:

- HVAC systems (e.g., air handling units, chillers)

- Plumbing systems (e.g., water supply/venting)

- Industrial processes (e.g., pneumatic or hydraulic control)

- Fire protection systems (e.g., venting or drain applications)

9. **Ease of Installation** The valve is designed for straightforward mounting, and its direct-acting mechanism reduces the complexity of the installation process compared to pilot-operated valves.

10. **Compatibility with Common Fluids** While the valve is typically used with air or water, Maxon valves are often rated for a variety of fluids (e.g., steam, glycol solutions) depending on the specific model and materials used in the construction.

---

#### **Cons:**

1. **Limited Pressure and Temperature Ratings** Without checking the full datasheet, this valve may have moderate pressure and temperature limits (e.g., 150 psi max, 200 F max). For high-pressure or high-temperature applications, a heavier-duty valve (e.g., 200 psi or 300 F rated) may be required. Always verify the valve s specifications against your system s operating conditions.

2. **Single-Phase Power Dependency** The 115V AC requirement means it cannot be used in systems requiring 24V DC or other voltage standards. If your system uses low-voltage control, you may need a compatible solenoid or a transformer.

3. **Potential for Wear Over Time** Like all solenoid valves, this one may experience wear on the solenoid coil, seals, or internal mechanisms over extended use. Regular maintenance (e.g., lubrication, seal replacement) may be necessary to ensure longevity.

4. **Noisy Operation** Direct-acting solenoid valves can sometimes produce noise during operation, particularly when the solenoid clicks or the valve opens/closes rapidly. This may be a concern in sensitive environments (e.g., hospitals, data centers).

5. **Limited Flow Rate** The 3/4 NPT size suggests a moderate flow capacity. For high-flow applications, a larger valve (e.g., 1-inch or 1.5-inch NPT) may be required to avoid pressure drops or inadequate flow rates.

6. **Potential for Leakage** Over time, seals or gaskets may degrade, leading to minor leaks. This is more likely if the valve is exposed to corrosive fluids or extreme temperature fluctuations.

7. **Cost Compared to Simpler Valves** While not excessively expensive, this is a specialized solenoid valve. For basic on/off control in low-pressure systems, a simpler manual valve or a less sophisticated solenoid valve might suffice at a lower cost.

8. **Requires Proper Electrical Protection** The solenoid should be installed with appropriate circuit protection (e.g., fuses, circuit breakers) to prevent damage from power surges or electrical faults.

9. **Maintenance Requirements** Direct-acting solenoid valves may require periodic cleaning of the solenoid coil or lubrication of moving parts to prevent sticking or reduced performance.

10. **Compatibility with Control Systems** If integrating with a PLC or automation system, additional wiring, relays, or control logic may be needed, adding complexity to the setup.

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### **Conclusion:**

The **Maxon 075SMA21-AB12-BB12A0** is a **reliable, direct-acting solenoid valve** well-suited for **low-pressure, normally vent applications** in HVAC, plumbing, or industrial systems where fail-safe operation is critical. Its **standard 115V AC power supply and 3/4 NPT threading** make it easy to integrate into existing systems, while its **direct-acting design** simplifies installation.

However, its **moderate pressure and temperature ratings**, **potential for noise or wear**, and **dependency on single-phase power** may limit its use in high-demand or specialized applications. If your system requires **higher pressure, extreme temperatures, or low-voltage control**, a different valve model may be more appropriate.

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### **Recommendation:** **Buy this valve if:**

- You need a **normally vent (fail-safe) solenoid valve** for a **low-pressure system** (e.g., HVAC venting, water supply control).

- Your system operates within the valve s **rated pressure and temperature limits** (verify with the datasheet).

- You have **standard 115V AC power** available and require **3/4 NPT connections**.

- You prioritize **reliability and ease of installation** over extreme performance.

**Consider alternatives if:**

- Your system requires **higher pressure or temperature ratings** (e.g., 200 psi or 300 F ).

- You need **low-voltage (24V DC) operation** or **higher flow rates** (consider a larger valve or pilot-operated model).

- Noise or vibration is a concern (a silent or buffered solenoid valve may be better).

- Your application involves **corrosive or abrasive fluids** (ensure the valve is rated for the specific medium).

**Final Suggestion:**

Before purchasing, **review the full datasheet** for the valve s exact specifications (pressure, temperature, flow rate, and fluid compatibility). If possible, consult with a **plumbing engineer or HVAC specialist** to confirm compatibility with your system. Additionally, consider purchasing from a **reputable distributor** (e.g., Grainger, McMaster-Carr, or a local industrial supplier) to ensure you receive the correct model and avoid counterfeit products.

Details:

Pressure Regulator Valves. Butterfly Valves. Disconnect Switches. Model Number:075SMA21-AB12-BB12A0.

part #: 075sma21ab12bb12a0 price

  • $1878.10

specifications valvesplumbing:

  • brand: Maxon
  • mpn: 075sma21-ab12-bb12a0
  • part type: Valve Vent
  • voltage: Ac
  • reference sku: 1766608
  • product condition: Used Excellent

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  • started: May 8, 2026
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  • Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Other Valves Manifolds

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part type: valve vent, voltage: ac, reference sku: 1766608, product condition: used excellent,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > valves manifolds, sku: 24320030077992892,
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