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PORTER INSTRUMENT COMPANY B-579 Valve Flow Meter 0-120 N2

B-579 Porter Instrument Company Flow Meter 0-120 With Valve N2 20 Psig Used Lot Of 2

( Brand: Porter Instrument Company ), ( Manufacturer Part Number: B-579 ), ( Part Type: Valve Instrument )

Review PORTER INSTRUMENT COMPANY Flow Meter 0-120 Valve N2 Psig Used Lot Of

The **Porter B-579 Flow Meter with 0-120 Valve, N2 (Nitrogen) 20** is a precision-engineered, high-performance gas flow control device designed for applications requiring accurate, reliable, and repeatable measurement and regulation of nitrogen (N ) gas flow rates. This robust flow meter combines a durable glass or metal tube rotameter with a built-in needle valve, allowing operators to seamlessly monitor and adjust flow rates within a calibrated range of 0 to 20 standard liters per minute (SLPM) or cubic feet per hour (CFH), depending on the specific gas and operating conditions. The B-579 series is part of Porter Instrument s trusted line of industrial-grade flow meters, renowned for their durability, ease of use, and compatibility with a wide range of gases, including inert, corrosive, and reactive substances when properly selected.

The flow meter features a **vertical, tapered-bore rotameter tube** that houses a floating float (typically made of glass or metal) whose position within the tube corresponds directly to the flow rate of the gas passing through. As nitrogen enters the system, it lifts the float until the force of the gas upward is balanced by the float s weight, creating a stable visual indication of the flow rate. The **integrated 0-120 valve** (often a needle valve) allows for precise throttling of the gas flow, enabling fine adjustments without the need for external regulators. This built-in valve is particularly useful in applications where rapid or incremental flow changes are required, such as in laboratory settings, medical gas delivery systems, or industrial processes where nitrogen is used for purging, inerting, or calibration purposes.

Constructed with **high-quality materials**, the B-579 is designed for both laboratory and industrial environments. The rotameter tube is typically made from **borosilicate glass** for chemical resistance and clarity, while the float is often crafted from durable materials like stainless steel or glass to prevent corrosion and ensure longevity. The valve mechanism is engineered for smooth operation, reducing wear and minimizing the risk of leaks, which is critical when handling gases like nitrogen, which can be essential for maintaining inert atmospheres or precise experimental conditions. The meter is also equipped with **pressure compensation** features in some models, ensuring accurate readings across varying pressure conditions, which is particularly beneficial in applications where upstream or downstream pressure fluctuations could otherwise affect flow measurement.

This flow meter is **calibrated for nitrogen (N ) at 20 C (68 F)** and 1 atmosphere (atm) pressure, providing accurate flow readings under standard conditions. However, it can be adapted for other gases with the appropriate float and calibration adjustments, though it is essential to verify compatibility with the specific gas properties to avoid inaccuracies. The **0-120 valve designation** indicates the maximum flow rate the meter can handle, making it suitable for moderate to high-flow applications where precise control is necessary. The meter s **vertical orientation** ensures that the float remains stable and readable, even in environments with slight vibrations or movement, while the clear scale markings allow for quick, at-a-glance monitoring.

Ideal for applications such as **gas chromatography, inerting processes, medical oxygen/nitrogen blending, laboratory gas delivery, and industrial purging systems**, the Porter B-579 offers a balance of simplicity and precision. Its compact yet sturdy design makes it easy to integrate into existing gas distribution systems, and its durable construction ensures reliable performance over extended periods. Whether used in a controlled laboratory environment or a rugged industrial setting, this flow meter provides operators with the confidence of accurate flow measurement and control, contributing to the efficiency and safety of nitrogen-based processes.

**Pros and Cons of buying a Porter B-579 Flow Meter (0-120 SCFH, N , 20 PSIG)**

### **Pros**

1. **Precision and Reliability** The B-579 is a thermal mass flow meter known for its accuracy in measuring gas flow rates, particularly for nitrogen (N ). It provides consistent readings under stable operating conditions, making it suitable for laboratory, industrial, or research applications where precise flow control is critical.

2. **Wide Range Compatibility** With a flow range of 0 120 SCFH (Standard Cubic Feet per Hour) and a pressure rating of 20 PSIG, it is versatile for moderate flow applications. This range is adequate for many small-scale processes, such as gas delivery in analytical instruments, vacuum systems, or controlled atmosphere experiments.

3. **Durability and Build Quality** Porter Instruments is a reputable brand with a history of producing robust flow meters. The B-579 is designed for industrial use, featuring sturdy construction that can withstand regular use without frequent maintenance issues.

4. **Easy Installation and Calibration** The meter is designed for straightforward integration into gas delivery systems. It includes a valve, simplifying setup for applications where flow control is needed directly at the outlet. Calibration is typically straightforward, though periodic recalibration may be required for optimal performance.

5. **Compatibility with Nitrogen (N )** Since it is specifically rated for nitrogen, it avoids potential issues with other gases that might require different calibration or materials. This reduces the risk of cross-contamination or material degradation.

6. **Digital Display and Readout** Many models in the B-579 series include a digital interface for real-time flow monitoring, which enhances usability in applications requiring precise tracking of gas consumption or delivery rates.

7. **Low Maintenance Requirements** Thermal mass flow meters generally have fewer moving parts compared to mechanical flow meters, reducing wear and tear. This translates to lower long-term maintenance costs.

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### **Cons**

1. **Limited Flow Range** The 0 120 SCFH range may be insufficient for high-volume applications. If your process requires significantly higher flow rates, you may need to invest in a larger or more advanced model, potentially increasing costs.

2. **Pressure Sensitivity** While rated for 20 PSIG, the meter s accuracy can be affected by fluctuations in upstream or downstream pressure. If your system experiences significant pressure variations, additional regulation or stabilization may be necessary.

3. **Cost Relative to Simpler Alternatives** For applications where extreme precision is not critical, simpler mechanical flow meters or rotameters might offer comparable performance at a lower cost. The B-579 s thermal technology is more expensive than basic mechanical options.

4. **Calibration Dependency** Like all flow meters, the B-579 requires periodic calibration to maintain accuracy. This adds to operational costs and may require specialized equipment or services, depending on your setup.

5. **Potential for Drift Over Time** Thermal mass flow meters can experience drift due to sensor degradation or environmental factors (e.g., temperature fluctuations). While this is common to all flow meters, it necessitates regular monitoring and recalibration.

6. **Limited Customization** The B-579 is a standard model with fixed specifications. If you require specialized features (e.g., remote monitoring, additional gas compatibility, or unique mounting options), you may need to explore other models or add-ons, which could increase complexity and cost.

7. **Power Dependency** Thermal mass flow meters require power to operate. If your application involves intermittent power supply or remote locations without reliable electricity, this could be a drawback.

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### **Conclusion**

The Porter B-579 flow meter is a solid choice for applications requiring accurate, medium-range nitrogen flow control (0 120 SCFH) in stable operating conditions. Its precision, durability, and ease of use make it ideal for laboratory, industrial, or research settings where consistency is paramount. However, its limitations such as the fixed flow range, pressure sensitivity, and higher cost compared to simpler alternatives may make it less suitable for high-volume or highly variable applications.

If your primary needs align with the meter s specifications and you prioritize reliability and accuracy, the B-579 is a worthwhile investment. For applications with broader flow requirements or extreme environmental conditions, you may need to consider complementary equipment (e.g., pressure regulators, additional calibration tools) or explore alternative flow meters.

### **Recommendation**

**Buy the Porter B-579 if:**

- You need precise flow measurement for nitrogen within the 0 120 SCFH range.

- Your system operates under relatively stable pressure conditions.

- You require a durable, low-maintenance solution for laboratory or controlled industrial processes.

- You are willing to invest in a high-quality, calibrated flow meter for critical applications.

**Consider alternatives if:**

- Your flow requirements exceed 120 SCFH or involve significant pressure fluctuations.

- You are working with a tight budget and simpler, lower-cost flow meters (e.g., rotameters) would suffice.

- Your application involves harsh environmental conditions that could affect sensor performance without additional protection.

For most users seeking a reliable, mid-range nitrogen flow meter, the B-579 is a strong and practical choice. Pair it with appropriate upstream pressure regulation and a calibration schedule to ensure long-term performance.

Details:

Porter Instrument Flow Meter B-579, 0-120 with Valve, N2, 20 PSIG Used, Lot of 2.

part #: b579 price

  • $50.00

specifications pneumativalv:

  • brand: Porter Instrument Company
  • mpn: B-579
  • part type: Valve Instrument

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  • availability: In Stock
  • started: May 14, 2026
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  • condition: Used

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part type: valve instrument,
category: business & industrial > pump flow controllers > flow controllers meters > flow meters, sku: 12238558264749793,
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