DWYER VFA-7-SSV Visi Float Scfh Air Flow Meter 5-50 116007-01

( Brand: Dwyer ), ( Manufacturer Part Number: VFA-7-SSV ), ( Part Type: Flow Meter )

Review DWYER Lot Of Visi float Flow Meter 5-50 Scfh Air

The **Dwyer VFA-7-SSV Visi-Float Flow Meter (Part #116007-01)** is a precision-engineered, glass-tube flow meter designed for reliable and accurate measurement of air flow in low to medium-range applications, making it an ideal choice for HVAC systems, laboratory ventilation, industrial process control, and general air handling applications. This model operates within a flow range of **5 to 50 standard cubic feet per hour (scfh)**, ensuring optimal performance for small-scale air monitoring where precision is critical. The **Visi-Float design** features a clear, durable glass tube with a floating piston that moves proportionally with the flow rate, providing a direct visual indication of airflow eliminating the need for external gauges or digital readouts in many applications. The **SSV (Stainless Steel Valve)** variant includes a high-quality stainless steel shut-off valve at the outlet, which not only prevents backflow but also enhances durability and resistance to corrosion, making it suitable for environments where cleanliness and longevity are priorities. Constructed from **high-grade borosilicate glass**, the flow tube is resistant to thermal shock and chemical degradation, ensuring long-term reliability even in fluctuating conditions. The **metal housing** provides structural integrity while maintaining a compact, space-saving design, ideal for installation in tight spaces such as ductwork, instrument panels, or laboratory setups. Additionally, the **threaded connections (NPT)** simplify installation, allowing for quick and secure integration into existing piping systems without the need for additional fittings. Whether used for calibrating air systems, monitoring filtration efficiency, or ensuring proper ventilation in controlled environments, the **Dwyer VFA-7-SSV** delivers consistent, repeatable measurements with minimal maintenance, making it a trusted solution for engineers, technicians, and researchers who demand both accuracy and simplicity in their instrumentation.

### **Pros and Cons of buying a Dwyer VFA-7-SSV Visi-Float Flow Meter (5-50 SCFH Air, Part #116007-01)**

#### **Pros**

1. **Accurate and Reliable Measurement**

The VFA-7-SSV is a Visi-Float flow meter, which uses a visible float inside a transparent tube to provide direct visual indication of airflow. This design ensures high accuracy for low to medium airflow rates (5-50 SCFH), making it suitable for precise applications such as laboratory gas delivery, small-scale HVAC systems, or pneumatic testing.

2. **Durable and Long-Lasting Construction**

Dwyer is a well-established manufacturer known for producing robust instrumentation. The VFA-7-SSV is likely built with stainless steel or high-quality plastics, ensuring resistance to corrosion, wear, and environmental factors, which extends its operational lifespan.

3. **Simple Installation and Maintenance**

The flow meter is designed for easy installation, typically requiring minimal piping modifications. Its straightforward float-based mechanism also means that maintenance is relatively simple just cleaning the tube or replacing the float if damaged.

4. **Direct Visual Readout**

Unlike digital flow meters, the VFA-7-SSV provides a clear, immediate visual reading without requiring additional instrumentation. This can be advantageous in field applications where power or connectivity is limited.

5. **Cost-Effective for Low-Flow Applications**

For applications requiring airflow measurement in the 5-50 SCFH range, this meter offers a cost-effective solution compared to more advanced (and expensive) electronic or mass flow meters.

6. **Compatibility with Air and Other Gases**

The unit is specified for air but may also work with other non-corrosive gases, depending on the material of the float and tube. This versatility makes it useful in various industrial or laboratory settings.

7. **Low Pressure Drop**

The design minimizes pressure loss across the meter, which is beneficial for systems where maintaining efficient airflow is critical.

---

#### **Cons**

1. **Limited Flow Range**

The meter is only calibrated for 5-50 SCFH, making it unsuitable for higher or lower flow rates. If your application requires a broader range, you would need a different model, potentially increasing costs.

2. **No Digital Output or Data Logging**

Unlike electronic flow meters, the VFA-7-SSV does not provide digital signals (e.g., 4-20 mA, pulse, or RS-485) or data logging capabilities. This limits its use in automated systems or applications requiring remote monitoring.

3. **Susceptibility to Contamination**

The transparent tube and float can become clogged or damaged by particulate matter, dust, or moisture. This requires regular cleaning or replacement, which may add to maintenance efforts.

4. **Less Suitable for High-Pressure Applications**

While it works well for low-pressure air systems, it may not be ideal for high-pressure environments where other types of flow meters (e.g., turbine or ultrasonic) are more robust.

5. **Potential for Human Error in Readings**

Since the reading is manual and visual, there is a risk of misreading the float position, especially in low-light conditions or if the tube is dirty.

6. **Limited Temperature Range**

The meter may not perform optimally outside its specified temperature range (typically 32 F to 120 F / 0 C to 49 C). Extreme temperatures could affect accuracy or durability.

7. **No Built-In Calibration Adjustment**

Unlike some electronic meters, the VFA-7-SSV does not allow for on-site calibration adjustments. If the meter drifts over time, it may require recalibration at a service center.

---

### **Conclusion**

The **Dwyer VFA-7-SSV Visi-Float Flow Meter** is an excellent choice for applications requiring **accurate, low-cost, and visually intuitive airflow measurement in the 5-50 SCFH range**. Its simplicity, durability, and direct readout make it ideal for **laboratory settings, small HVAC systems, pneumatic testing, or any environment where low-flow air measurement is needed without complex instrumentation**.

However, if your application demands **digital outputs, broader flow ranges, high-pressure tolerance, or automated data logging**, this meter may not be the best fit. In such cases, consider alternatives like **electronic mass flow meters, turbine flow meters, or ultrasonic flow meters**.

---

### **Recommendation**

- You need a **simple, reliable, and cost-effective** solution for measuring **low airflow (5-50 SCFH)**.

- Your application **does not require digital outputs or automation**.

- The environment is **clean and within the meter s specified temperature and pressure range**.

- You prefer a **mechanical, low-maintenance** flow meter with a **direct visual readout**.

- You require **higher flow rates** (above 50 SCFH) or **lower flow rates** (below 5 SCFH).

- Your system needs **remote monitoring, data logging, or digital communication**.

- The application involves **high-pressure air, harsh chemicals, or extreme temperatures**.

- You prioritize **automated calibration or advanced diagnostic features**.

For most **basic airflow measurement needs within its specified range**, the VFA-7-SSV is a **solid, well-supported choice** from a reputable manufacturer. If your requirements extend beyond its capabilities, explore alternative flow meter technologies to ensure optimal performance.

Details:

Lot of 2 Dwyer VFA-7-SSV Visi-Float Flow Meter 5-50 SCFH AIR 116007-01.

part #: vfa7 prices

• $29.95-$52.00

specifications pneumativalv:

• brand: Dwyer
• mpn: Vfa-7-ssv
• part type: Flow Meter

returns pneumativalv:

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

general pneumativalv:

• Pump Flow Controllers > Flow Controllers Meters > Flow Meters
• condition: Used

seller pneumativalv:

• # reviews: 13131
• rating: 100.0%
• city: Portland, Oregon

payments pneumativalv:

• other
• credit card: Mastercard
• wallet: Apple-pay

offer pneumativalv:

• sold: 0
• quantity: 1
• availability: In Stock
• best offers: True
• started: April 6, 2026
• options: Ship-to-home

shipping pneumativalv:

• cost: $0.00
• service: UPS Ground, UPS Next Day Air, UPS 2nd Day Air
• transit: 3-8 Days
• class: Standard, One-day, Expedited
• type: Calculated
• carrier: UPS

Dwyer VFA-7 Is Similar To:

• 092014000429 Dwyer Indicator Flow Meter Transmittr (36.7% similar) The rt is useful anywhere a compatible flow meter used and rate total are desired. It is compatible with the series EFS2, ifs, Pd's, tbs and flag. It can be mounted on a wall. The series rt rate total indicator is an transmitter that takes pulse output signal from compatible flow meters, displays ...(April 12th, 2018)
• 16001900 Dwyer Argon Flow Meter Scfh Npt (43.6% similar) Need this item next day. If you do not have an account no worries. Messaging: through messages...(December 7th, 2018)
• 170252-00 Dwyer Flow Meter Scfh Argon Ball Moves In Tube (39.7% similar) They are part of the. C17627DWYER flow meter - 10 scfh argon ball moves in tube please review all the pictures. We combine shipping whenever possible...(February 24th, 2019)
• 174186-50 Dwyer Visi-float Vfa Series (37.4% similar) Please feel free to message me with any questions. See pictures. Dwyer visi-float vfa series acrylic flow-meter clear this listing is for 1 unit in open manufacturers packaging. 75MM10-30LEAK size thousandths of an MAX49 c to 120 f max includes 1 flow-meter, knob us. Packaging shows some scuffs ...(December 8th, 2017)
• 190606-00 Dwyer Water Flow Meter (37.3% similar) Dwyer 55LPH water flow meter D609083 brand:Dwyer condition: used model: type: shipping. 25 lbs shipping dimensions: final combined rates will depend on item weight and dimensions...(April 24th, 2018)
• 194083-00 Dwyer Flow Meter Npt (34% similar) Dwyer visi-float 30-280CC min 1/8 in not variable area flow meter D647574 brand:Dwyer condition: new without factory packaging model: size: 8 in thread type: shipping...(November 6th, 2018)
• 194119-00 Dwyer Flow Meter Npt (34% similar) Dwyer visi-float 350-1900CC min 1/8 in not variable area flow meter D647582 brand:Dwyer condition: new without factory packaging model: size: 8 in thread type: shipping...(November 5th, 2018)
• 195337-00 Dwyer Visi-float Vfb Flowmeter (45.5% similar) My goal is 100% satisfaction. Dwyer series VF visi-float flow meter in original box. Condition: appears unused, in original box...(January 3rd, 2018)
• 250-af Dwyer Manometer Inclined Air Filter Gage (30.8% similar) 91 lbs shipping DIMENSIONS:12...(January 17th, 2019)
• 34ssv Dwyer Instruments Series Vfa (17.3% similar) See picture two for model number imprint on box flap. The small print: folks, this is how I feed my family. New open box Dwyer visi-float. See pictures for condition. Includes instructions...(December 2nd, 2017)
• 400-10 Dwyer Air Velocity Meter Fpm Pitot Tube (36.2% similar) Items are not returnable for condition issues commented on or shown in the pictures. If you ever have any questions or are unsatisfied, for reason please let us know. Please with any questions or concerns. Vb industrial supply offers a huge selection of tools for every trade including new and used ...(May 2nd, 2018)