VMD-A Axial Inline Fan
VMD-A hybrid axial inline fans connect to circular duct systems for clean-air supply and exhaust duties. The range covers nominal sizes VMD355 to VMD1000, with 60 Hz catalog options for ventilation projects in Saudi Arabia.
What is a VMD-A axial inline fan?
A VMD-A axial inline fan is a compact circular-duct ventilation fan with a mixed-type impeller and drive components positioned outside the conveyed airflow. Select it by required CFM, system pressure, nominal diameter, voltage, and the applicable performance curve.
Is the VMD-A suitable for your duct system?
Evaluate your airstream, duct layout, and system resistance before finalizing selection.
VMD-A model performance specifications
Catalog model references for quotation and technical review. Published values list catalog speeds and endpoints.
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| Model Name | Catalog RPM | Motor Power | Voltage / Frequency | Free-Air Airflow (0 in. wg) | Shutoff Total Pressure (0 CFM) | Nominal Fan Diameter |
|---|---|---|---|---|---|---|
| VMD355 | 1720 / 3420 RPM | 0.25 HP / 2 HP | 220V / 380V, 60Hz | 2,352 / 4,703 CFM | 1.1 / 4.5 in. wg | 355 mm |
| VMD400 | 1720 / 3420 RPM | 0.75 HP / 4 HP | 220V / 380V, 60Hz | 3,353 / 6,706 CFM | 1.4 / 5.5 in. wg | 400 mm |
| VMD450 | 1120 / 1720 RPM | 0.75 HP / 1 HP | 220V / 380V, 60Hz | 2,790 / 4,871 CFM | 0.6 / 1.4 in. wg | 450 mm |
| VMD500 | 1120 / 1720 RPM | 1 HP / 2 HP | 220V / 380V, 60Hz | 4,198 / 6,044 CFM | 0.9 / 2.1 in. wg | 500 mm |
| VMD560 | 1120 / 1720 RPM | 1.5 HP / 3 HP | 380V, 60Hz | 5,975 / 9,176 CFM | 1.7 / 3.0 in. wg | 560 mm |
| VMD630 | 1120 / 1720 RPM | 3 HP / 5.5 HP | 380V, 60Hz | 13,959 / 21,437 CFM | 1.7 / 4.0 in. wg | 630 mm |
| VMD710 | 1120 / 1720 RPM | 5.5 HP / 15 HP | 380V, 60Hz | 16,192 / 24,866 CFM | 2.0 / 4.7 in. wg | 710 mm |
| VMD800 | 1120 / 1720 RPM | 10 HP / 25 HP | 380V, 60Hz | 20,492 / 31,835 CFM | 3.0 / 7.2 in. wg | 800 mm |
| VMD900 | 1120 RPM | 15 HP | 380V, 60Hz | 30,488 CFM | 3.4 in. wg | 900 mm |
| VMD1000 | 1120 RPM | 20 HP | 380V, 60Hz | 40,484 CFM | 3.9 in. wg | 1000 mm |
VMD-A Product Overview
An axial inline fan is installed directly in a duct run to move air through circular ducting. The VMD-A series is designed for clean-air ventilation systems with constant or variable air volume where compact inline mounting and external drive service access are required.
The series features a hybrid mixed-type high-efficiency impeller, direct circular duct connection, and belt-drive and bearing components positioned outside the conveyed airflow. The catalog lists an L10 fan-shaft bearing life of at least 80,000 hours.
The VMD-A performance tables include 60 Hz voltage references for clean-air supply, return, compatible laboratory ventilation, and filtration systems. Confirm the selected model, voltage, and motor phase before quotation and submittal.
Key features for axial inline ventilation
A compact inline fan range for ducted systems where airflow, pressure, safe maintenance, and efficient impeller performance matter.
Technical specifications
Final selection depends on airflow, total pressure, duct diameter, operating point, voltage, filtration or kitchen matching requirements, and site conditions.
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| Specification | Available Options / Details |
|---|---|
| Product Category | Inline Fan |
| Product Type | Hybrid Axial Inline Fan |
| Series | VMD-A Series (VMD-A Ultra-efficient Axial Fan) |
| Installation | Inline circular duct connection |
| Fan Design | Hybrid / mixed-type axial impeller with external isolated belt drive |
| Housing | Nylon and steel mold construction (catalog reference) |
| Bearings | L10 bearing life rated at least 80,000 hours, located outside airstream |
| Frequency | 60Hz catalog reference |
| Voltage / Phase | 220V / 380V, 60Hz catalog references by model; confirm motor phase before ordering |
| Power Range | 0.25 HP to 25 HP catalog range |
| Speed Range | 1120 / 1720 / 3420 RPM catalog options |
| Maximum catalog free-air airflow | 40,484 CFM (at 0 in. wg catalog endpoint) |
| Maximum catalog shutoff pressure | 7.2 in. wg (at 0 CFM catalog endpoint) |
| Model Range | VMD355, VMD400, VMD450, VMD500, VMD560, VMD630, VMD710, VMD800, VMD900, VMD1000 |
| Suitable Applications | General clean-air supply or exhaust, compatible laboratory ventilation, filtration support, circular duct systems |
| Application Limitations | The supplied catalog does not establish approval for Type I grease exhaust or emergency smoke duty and excludes flammable, explosive, and powder-laden airstreams |
| Documentation | Catalog PDF, technical submittal, quotation, and compliance documents on request |
Inline fan system comparison
Match your duct routing and pressure requirements with the correct inline fan category.
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| System Condition | Suggested Direction | Engineering Note |
|---|---|---|
| Circular duct, clean air, duty point matches VMD curve | VMD-A Axial Inline Fan | Compact circular inline with isolated belt drive for clean air. |
| Long duct, multiple elbows, filters, or higher resistance | Centrifugal Box Inline Fan | Backward-curved centrifugal impeller overcomes higher static pressure. |
| Flanged low-pressure general ventilation | VKF Inline Axial Duct Fan | Flanged axial casing for low-pressure high-volume air transfer. |
| Heavy-duty adjustable-pitch large duct | Saudi Fan AND Inline Axial Fan | Adjustable-pitch aluminum blades for high-capacity industrial ventilation. |
| Emergency smoke / high-temperature life-safety duty | VDO Axial Smoke Extraction Fan | Use an application-specific smoke fan and confirm the required temperature rating, certification, and project approval. |
VMD-A axial inline fan applications
Use VMD-A axial inline fans for compatible clean-air duct systems selected by airflow, pressure, nominal diameter, and the applicable performance curve.
What to Send for Correct Selection
Share the available project details and the team can guide VMD model size, airflow, total pressure, duct diameter, voltage, controls, and quotation before procurement.
Inline fan accessory options
Accessories can be included according to duct installation, control method, vibration isolation, safety, and project submittal requirements.
Documents and procurement files
Product catalog and company compliance documents can be shared for contractor, consultant, and procurement review.
Related ventilation products
Explore other inline, duct, and axial fan categories for project comparison.
VMD-A Axial Inline Fan Questions
Answers for contractors, MEP engineers, procurement teams, and facility buyers reviewing VMD-A axial inline fan options in Saudi Arabia.