Portable Axial Type Ventilation Fan — Manufacturer & Supplier, India
Vayuvents manufactures Portable Axial Type Ventilation Fans for high free-air delivery in confined space, construction, and site ventilation. 300 mm to 900 mm dia, IS 3588 compliant. Mumbai. Call +91 90961 88703.
A Portable Axial Type Ventilation Fan uses an axial flow impeller — the same aerodynamic blade design as fixed industrial axial fans — in a portable wheeled or hand-carried frame. The axial design delivers maximum free-air volume at low static pressure, making it ideal for open confined space entry ventilation where the fan delivers directly into the space without ductwork.
The axial impeller's high volume, low noise, and low power consumption characteristics make it the preferred portable fan type for large open spaces — construction excavations, ship cargo holds, large vessel interiors, and warehouse confined areas where maximising air volume per unit of power is more important than overcoming duct resistance.
Vayuvents manufactures portable axial ventilation fans from 300 mm to 900 mm diameter with airflows from 3,500 m³/hr to 28,000 m³/hr. The wheeled base repositions easily on smooth and rough site surfaces. IP55 motor for all-weather site use.
Available with reversible motor for supply/exhaust dual operation and with flameproof Ex-d motor for confined spaces in petrochemical, marine, and fuel storage applications.
Key Features & Benefits
Fully Portable
Wheeled trolley base or carrying handles — moves from location to location as ventilation needs change without any installation or structural fixing.
High Airflow Output
300 mm to 900 mm diameter provides 3,500 to 28,000 m³/hr — adequate fresh air supply or exhaust ventilation for spaces up to 2,000 m³.
Plug & Run
Short electrical cable connects to standard workshop socket — operational in minutes, no fixed wiring or installation work required.
IP55 Motor
IP55 TEFC motor handles site conditions — construction dust, humidity, and outdoor use without motor damage.
Reversible Option
Reversible motor option allows the same fan to supply fresh air or exhaust stale/contaminated air — versatile for changing site ventilation requirements.
Compact Storage
Compact dimensions for storage in plant room, site container, or maintenance store when not in active use.
Low Maintenance
Direct-drive design with no belts or pulleys — minimal maintenance, maximum uptime in demanding site and maintenance applications.
IS 3588 Compliant
Airflow performance tested per IS 3588-1987 with test certificate confirming stated free-air delivery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Fan Diameter Range | 300 mm to 900 mm |
| Airflow (Free Air) | 3,500 m³/hr to 28,000 m³/hr |
| Motor Power Range | 0.25 HP to 2.0 HP |
| Motor Speed | 1,440 RPM (4-Pole) |
| Motor Enclosure | IP55 TEFC |
| Casing Material | MS / Aluminium / SS304 |
| Base Type | Wheeled trolley frame / Carrying handles |
| Power Supply | 415V 3-Phase 50Hz / 230V Single-Phase |
| Cable Length | 3 to 5 metres standard |
| Standards | IS 3588-1987 | IS 4894 |
Airflow Performance — Model Range
| Sr. | Fan Model | Fan Dia (mm) | Motor (HP/Pole) | RPM | Free Air (m³/hr) | @5 mmWG | @10 mmWG | @15 mmWG | @20 mmWG | @25 mmWG |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | AX-75-28-120 | 305 | 0.75/2P | 2800 | 2,300 | — | 2,000 | 1,750 | 1,400 | — |
| 2 | AX-25-14-120 | 305 | 0.25/4P | 1440 | 1,800 | — | 1,500 | 1,450 | 1,320 | — |
| 3 | AX-50-14-150 | 385 | 0.50/4P | 1440 | 2,250 | 1,950 | 1,200 | — | — | — |
| 4 | AX-75-28-15 | 385 | 0.75/2P | 2850 | 5,000 | — | 4,100 | 3,900 | 3,700 | 3,300 |
| 5 | AX-50-14-180 | 460 | 0.50/4P | 1440 | 6,750 | 6,000 | 5,500 | 4,400 | — | — |
| 6 | AX-100-28-180 | 460 | 1.0/2P | 2880 | 9,000 | 8,000 | 7,500 | 6,200 | — | — |
| 7 | AX-100-14-240 | 600 | 1.0/4P | 1440 | 11,500 | 11,200 | 11,000 | 10,900 | 10,800 | — |
- Fan selection based on air at 20°C, density 1.2 kg/m³.
- Fan performance and tolerance as per IS 3588-1987.
Product Images
Where It Is Used
- Confined space pre-entry ventilation — removing oxygen-deficient or toxic atmosphere before worker entry
- Construction site temporary fresh air supply — enclosed basement, tunnel, and underground structure ventilation
- Ship tank and hold pre-entry ventilation — cooling and flushing enclosed cargo and ballast spaces
- Underground car park temporary CO dilution during maintenance and commissioning
- Painting and coating operations in enclosed spaces — solvent vapour dilution ventilation
- Industrial maintenance shutdown — temporary ventilation during heat exchanger cleaning and vessel entry
- Emergency ventilation — portable deployment for factory areas with failed fixed ventilation
- Agricultural drying — portable air circulation in grain drying and produce storage facilities
- Event and temporary structure cooling — blow-through cooling for marquees and temporary buildings
- Mine rescue and emergency — portable ventilation for rescue operation air supply
- Boiler internal inspection — cooling and air supply during scheduled boiler inspection and maintenance
- Food storage cool rooms — temporary air circulation during refrigeration system maintenance
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View Details →FAQs — Portable Axial Type Ventilation Fan
Portable ventilation fans are used for temporary ventilation where fixed fans cannot be installed — confined space pre-entry air supply, construction site enclosed space ventilation, ship tank and hold pre-entry cooling, maintenance shutdown temporary air supply, and emergency deployment when fixed ventilation fails. They are the essential tool for safe confined space entry compliance under IS 5916 and OISD standards.
For safe confined space entry pre-ventilation, a minimum of 20 air changes per hour of the confined space volume is recommended, using fresh outdoor air (not recirculated). For a typical 50 m³ ship tank, this requires 1,000 m³/hr minimum — achieved by a 300 mm portable fan. For larger spaces (excavations, large vessels), 400 to 600 mm fans providing 6,000 to 13,000 m³/hr are recommended. Vayuvents provides sizing guidance for your specific confined space.
Yes. Portable fans with reversible motors supply fresh air when running forward and exhaust contaminated air when running in reverse. This flexibility allows one fan to serve both pre-entry supply ventilation and post-entry exhaust during work operations. Even without a reversible motor, the fan can be repositioned at the confined space opening to push air in or pull air out depending on whether supply or exhaust is needed.
Standard Vayuvents portable ventilation fans are supplied with 415V 3-phase supply for larger sizes (above 0.5 HP). For construction sites and confined space work where only single-phase supply is available, 230V single-phase versions are supplied for sizes up to 0.5 HP. Portable generator supply at 230V single-phase is the most common power source for confined space and construction site applications.
Standard portable fans with IP55 induction motors are NOT safe in explosive atmospheres (Zone 1 or Zone 2). For confined spaces that may contain flammable vapours (fuel tanks, solvent storage), only flameproof Ex-d certified portable fans should be used. Vayuvents can supply flameproof portable ventilation fans for hazardous atmosphere confined space entry — please specify when requesting a quotation.
A portable ventilation fan is an open propeller or tube axial fan designed for free-air supply or exhaust ventilation. A portable blower cum exhauster has a centrifugal or higher-pressure axial fan that can overcome the resistance of connected flexible ducting — allowing air to be directed to a specific point 10 to 30 metres away through a duct. The blower cum exhauster is preferred where the ventilation point is not directly accessible to the fan, requiring ductwork.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the confined space or area volume, required airflow in m³/hr, power supply available (3-phase or single-phase), and any hazardous atmosphere requirements. We will recommend the correct model and provide a commercial proposal within 24 hours.