The Aerofoil family uses hollow, wing-profile backward blades — the cleanest-running blade form in the range. Air flows over them with the least turbulence, so the fan moves a given volume on the least motor power: the highest static efficiency in our range, a non-overloading power curve, and the quiet running that occupied buildings need. It is a clean-air family — filtered air, no more than a trace of dust — for HVAC plant, cleanroom & pharma AHU supply and return, and filtered forced-draft air. Engineered to your exact duty on our proprietary fan-selection software, sized to sit near best efficiency.
The blade is a hollow, wing-shaped section that leans away from the direction of rotation. That backward, smoothly-profiled form gives the cleanest airflow and the highest static efficiency of any blade type — but the thin section erodes in dust, so the family is for clean air only. Here is what that geometry does best.
The wing section converts the most motor power into useful air pressure — the highest static efficiency in the range (exact figures shared with your enquiry). Over a fan running thousands of hours a year, the electricity saved is the real cost argument.
A backward blade gives a non-overloading power curve — power rises with flow, peaks, then falls. If the duct resistance drops, the motor cannot be overloaded, so the drive is sized safely without a large margin.
Backward, smoothly-loaded blades run quieter than forward-curved or radial wheels — suited to occupied-building HVAC, cleanroom and pharma duty where sound limits apply.
The aerofoil is picked for running cost, drive safety and noise. The trade-off is honest: the hollow wing blade erodes in particulate, so it is a clean-air family. Keep the airstream clean and filtered and it is the most efficient wheel we make; once dust becomes more than a trace, the right answer is a tougher family, not this one.
On a fan that runs continuously, the motor bill — not the purchase price — is the lifetime cost. An over-sized or low-efficiency wheel quietly wastes power every hour.
How we engineer it outThe aerofoil's wing section gives the highest peak static efficiency in our range; the wheel is engineered onto its best-efficiency region on our proprietary fan-selection software, not over-sized for safety.
If a filter is removed or a damper opens, a forward-curved fan's power keeps climbing and can overload the motor — a real off-design failure mode in HVAC plant.
How we engineer it outThe backward aerofoil characteristic is non-overloading — power peaks then falls — so the motor is protected without paying for a large drive margin.
The thin hollow aerofoil blade erodes quickly in grit or dust; run it on a dirty airstream and the wheel loses balance and life fast.
How we engineer it outWe gate the family at clean, filtered air and say so plainly — for light dust we step you to the Backward-Curved family, for FD/process and heavier dust to the Backward-Curved Plate family, the Radial-Tip family or the Radial family.
Not a catalogue near-fit. The wheel, width, materials and accessories are chosen to your flow, pressure, temperature and installation — and the hollow aerofoil blade is fabricated and balanced for the 100 m/s tip.
No catalogue fan forced onto your spec. Your operating point is engineered onto the best-efficiency region of the selected aerofoil wheel — then verified to the AMCA 210 / ISO 5801 method in-house on our 200 HP VFD test rig before dispatch.
| Parameter | Standard | On application |
|---|---|---|
| Volume flow | 800–2,00,000 CMH | higher on enquiry |
| Static pressure | 10–650 mmWC | per-wheel max ~537 mmWC; higher on enquiry |
| Peak static efficiency | highest in our range — shared on enquiry | near-best-efficiency selection per duty |
| Inlet dust loading (gate) | clean, filtered air only | above gate → step to the Backward-Curved, Backward-Curved Plate, Radial-Tip or Radial family |
| Continuous air temperature | up to 400 °C with HT construction | higher on enquiry (HT-aerofoil) |
| Drive power | up to 400 HP | higher with custom motor sourcing |
| Balance quality | ISO 21940 G6.3 standard | G2.5 on request (occupied-building / pharma) |
| Bearing life (design target) | L10h ≥ 40,000 h continuous | longer L10 on application |
The Aerofoil family is offered engineered-to-order. The published envelope — 800–2,00,000 CMH, 10–650 mmWC, up to 400 HP and 400 °C — is the family capability across our aerofoil range. The hard limit is dust: clean, filtered air only. For anything dusty, the aerofoil is the wrong family and we will say so.
The same engineering language carries from your enquiry to the GA drawing to the nameplate — expressed in the standard AMCA conventions.
| Specification field | Options |
|---|---|
| Arrangement (AMCA 99) | Arr. 1 (overhung, fan bearings) / Arr. 4 (direct, motor on base) / Arr. 8 (overhung on common base) / Arr. 9 (overhung, motor side) / plug-plenum (unhoused) for AHU and fan-array — selected by drive, access and mounting. |
| Width / inlet | SWSI (single width, single inlet, -S) for higher pressure; DWDI (double width, double inlet, -D) for high volume in a compact height. Peak efficiency in the family is reached on the largest DWDI wheel. |
| Wheel type | Aerofoil — hollow, wing-profile backward blade. Wheel sizes from 310–3,050 mm diameter, tip speed 100 m/s (the lowest in the range — the aerofoil limit). |
| Class (by pressure / outlet velocity) | Class I / II selected from the duty point on the pressure-vs-outlet-velocity limits; the aerofoil sits at the low-tip, high-efficiency, clean-air end of the class table. |
| Materials of construction | MS (standard) / SS304 or 316 (full or airstream) for clean corrosive duty / FRP (F suffix) / Corten or duplex per duty. No wear-plating by design — anything beyond clean, filtered air moves the duty to another family. |
| Drive | Direct-coupled / V-belt / VFD (with shaft-earthing ring). Drive up to 400 HP across the envelope; the non-overloading curve lets the motor be sized without a large overload margin. |
| Discharge & rotation (AMCA orientation) | Rotation CW or CCW (viewed from drive side) with discharge angle per AMCA — e.g. TH/BH/UB/DB — set to match your duct take-off and installed footprint; plug/plenum builds discharge into the plenum. |
| Construction suffix & accessory scope | HT high-temperature (to 400 °C) / SR spark-resistant (AMCA 99 Type A/B/C, ATEX) per area classification; inlet guide vanes (IGV / in-cone IVC) and dampers for trim control; inlet/outlet silencers for occupied-building noise; flexible connectors and anti-vibration mounts; plug/plenum mounting kit for AHU and fan-array (N+1) builds. |
Every job's performance is verified at our works on the 200 HP VFD test rig, to the AMCA 210 / ISO 5801 method, before dispatch.
AHU supply and return, fan-wall / fan-array (N+1) plenum builds, central-plant ventilation.
Cleanroom and pharma AHU supply and return — efficiency and low noise on filtered air.
Clean-process supply air and general clean ventilation.
Clean cooling-air supply where running cost and acoustics dominate.
Cleanroom AHU and filtered-air handling for controlled environments.
Filtered forced-draft (FD) air where the air is genuinely clean.
Large building ventilation and supply air with sound-limit constraints.
4 aerofoil wheels engineered to duty. Tell us your flow and static.
What our marks mean, in the words that survive an audit.
Tested to the AMCA 210 / ISO 5801 method, in-house on our 200 HP VFD rig. Tested-to-method — not AMCA-certified.
ISO 9001:2015 — third-party certified. Our only third-party certification.
Self-declared per 2006/42/EC + 2014/35/EU (Module A). A self-declaration, not a notified-body certificate.
Self-declared, Zone 2/22, Category 3, per 2014/34/EU, where the area classification calls for it.
Designed and built to API 673 as project-specific scope.
ASME Sec IX qualified welders + WPS for every joint.
ISO 21940 — G6.3 minimum, G2.5 / G1.0 on application.
ISO 20816 evaluation; ISO 14694 for fan-specific limits.
| Stage | Standard duty | API-673 / engineered |
|---|---|---|
| Offer / quotation | 3 working days — always | 7–10 working days |
| GA drawing for approval | 2–3 weeks from PO | 3–4 weeks from PO |
| Manufacture + balance + paint | 6–10 weeks | 10–14 weeks |
| Performance test + witnessed FAT | ~1 week | 1–2 weeks |
| Order-to-dispatch (total) | 9–14 weeks | 14–20 weeks |
Shutdown-driven replacements: we have shipped fans within 6 weeks of a clean PO. Tell us your shutdown window and we commit to a dated plan.
The same engineering, viewed three ways — by fan family, by duty, and by industry. Follow the cross-references.
No model numbers needed. Give us the operating conditions — flow, static, gas temperature, composition, particulate, and any tender standard — and our application engineers size the fan and quote it. Attach a spec or GA if you have one.
+91 90110 09155 · mihir.jitamitra@gmail.com