Dwyer AFG-2 : Averaging Flow Grid, 5/8" (16 mm) Tube Diameter, 59-4/5" (1518 mm) Tube Length.
The Series AFG Averaging Flow Grid is a reliable and efficient tool for measuring air and gas flow in ducts up to 60 inches. Its design prioritizes accuracy, ease of installation, and cost-effectiveness, making it a practical choice for a variety of air monitoring applications.
Key Features:
- Cost-Effective Alternative: A simpler and more affordable option compared to traditional duct-mounted pressure sensors.
- Durable and Accurate: Provides years of reliable monitoring for both air and gas flow when paired with a suitable measuring instrument.
- Easy Installation: Supplied in kit form for flexibility, accommodating workshop or on-site installation in a wide range of duct shapes and sizes.
- Pressure Sensing Capability: Outputs a continuous differential pressure signal to measure air velocity and volume flow rates when connected to appropriate instruments.
The AFG Flow Grid consists of two perforated tubes mounted diagonally (for square or rectangular ducts) or diametrically (for round ducts):
- Total Pressure Tube: Equipped with equi-spaced holes facing upstream to measure total pressure.
- Static Pressure Tube: Features pairs of holes angled at 79° to sense static pressure.
The system averages the sensed pressures along each tube and transmits these signals through external connectors, creating a differential pressure output. This signal can be utilized to assess airflow characteristics like velocity and volume flow.
Applications:
- Flow Display: Pair with a micro-manometer, gauge, or transmitter for real-time display of differential pressure, velocity, or volume flow.
- Flow Rate Monitoring: Use with a pressure switch to signal over or under-flow conditions.
- System Control: Connect to a pressure transmitter with electrical output to integrate flow data into an automated control system.
- Visual Flow Indication: Use a fluid manometer to observe changes in volume flow rates visually.
Specifications
| Service: | Monitor air or compatible gas flow |
| Wetted Materials: | 304 SS, PVC, polyurethane, acetyl plastics, and neoprene rubber |
| Accuracy: | ±5% |
| Maximum Temperature: | 176°F (80°C) |
| Velocity Range: | 295.2 ft/min to 5904 ft/min (1.5 to 30 m/s) |
| Diameter of Tubes: | 5/16˝ (8 mm) or 5/8˝ (16 mm) |
| Maximum Duct Diagonal: | 60.4˝ (153.4 cm) |
| Maximum Duct Diameter: | 59.4˝ (150.9 cm) |
| Process Connections: | 5/16˝ barbed |
| Weight: | AFG-2: 3 lb (1361 g) |
Datasheets
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Dwyer AFG Series | Averaging Flow Grid Data Sheet |
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Dwyer AFG Series | Averaging Flow Grid Installation and Operating Instructions |
