The Jitamitra Radial-Tip wheel curves at the root and finishes straight (radial) at the tip: dust-tolerant and self-cleaning where a backward blade would erode, yet far more efficient than a full paddle radial. It is the family for gas carrying moderate dust — too much for a backward fan, below the heavy abrasive load of a radial — at medium-to-high pressure. Cement and raw-mill vent, dust-laden drying, sludge handling. Engineered to your duty across the envelope below, on a Class 4–5 build and proven on the rig.
The blade is curved near the hub and straightens to radial at the outer tip. That single geometric choice splits the difference between the efficient backward families and the rugged paddle radial — and it is why the family exists.
The straight, radial tip is self-cleaning and shrugs off particulate that would erode and clog a backward blade — the moderate-dust middle of the range.
The curved root keeps the inflow clean, so peak static efficiency lands well above a pure paddle radial's — the reward for not over-building for the dust.
A higher tip speed (150 m/s, Class 4–5 build) develops medium-to-high static — enough for mill-vent and dust-laden draught duty.
The radial-tip is chosen when the gas is dusty enough to erode a backward fan but not abrasive enough to justify a full radial. Pick it for the right reasons and you keep efficiency the radial would have cost you; pick it for the wrong gas and you under- or over-build. Once the abrasive load runs beyond moderate, this is the wrong family — step to the radial.
Cement / raw-mill vent and dust-laden drying gas carry particulate a smoothly-profiled backward or aerofoil blade cannot survive — the thin profile erodes and the build-up clogs the passages.
How we engineer it outThe straight radial tip is self-cleaning across the family's moderate-dust range; leading-edge hardfacing and bolt-in replaceable scroll liners are specified to the wear mode, with impeller-overlay refurbishment for the wear life.
Mill-vent and draught duties need real static, but a dust-tolerant wheel run faster carries blade-root and tip-speed stress that fails a fan built on hope.
How we engineer it outA Class 4–5 build — thicker plate, FEA on the higher-stress wheels, fine balancing — runs the 150 m/s tip safely to medium-to-high static rather than a fabricated wheel spun up and trusted.
Reaching for a full paddle radial on merely-moderate dust throws away efficiency — and on a fan running thousands of hours a year that is real electricity cost.
How we engineer it outThe curved root holds peak static efficiency noticeably above a pure radial's; we reserve the Radial family for genuinely heavy abrasive loads, not moderate dust.
We don't sell a catalogue near-fit. The wheel is sized to your flow, pressure, dust load and temperature, then engineered for the wear mode and the tip-speed stress.
No catalogue fan forced onto your spec. Your operating point is engineered onto the best-efficiency region of the selected radial-tip wheel — then verified on the 200 HP VFD test rig to the AMCA 210 / ISO 5801 method before dispatch.
| Parameter | Standard | On application |
|---|---|---|
| Volume flow | up to 2,00,000 CMH | higher on enquiry |
| Static pressure | up to 2,000 mmWC | to the envelope; per wheel + class |
| Inlet dust loading | moderate — more than a backward family should see | heavier abrasive load → step to the radial family |
| Continuous gas temperature | up to 600 °C with HT construction | hot-duty build confirmed on enquiry |
| Peak static efficiency (family character) | well above a paddle radial; below the backward families | duty-point efficiency engineered onto best-efficiency region |
| Drive power | up to 400 HP | higher with custom motor sourcing |
| Balance quality | ISO 21940 G6.3 standard | G2.5 fine balance for the 150 m/s tip |
| Bearing life (design target) | L10h ≥ 40,000 h continuous | longer L10 on application |
The envelope above is our published ceiling; the radial-tip family's own character sits inside it — a self-cleaning straight tip for moderate dust, peak static efficiency well above a paddle radial's (exact figures shared with your enquiry), on a Class 4–5 / 150 m/s build. Where the dust runs heavier or more abrasive, the rugged radial family is the right answer; where the gas is clean, a backward family is more efficient. We will tell you which.
The same engineering language carries from your enquiry to the GA drawing to the nameplate — expressed in the standard AMCA conventions, with the radial-tip family options spelled out.
| 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) / Arr. 10 (overhung, motor inside base) — selected by drive, access and temperature. |
| Width / inlet | SWSI (single width, single inlet) — standard for radial-tip duty; the family is built single-inlet for the pressure and the wear-protected wheel. |
| Wheel type | Radial-tipped (curved root, straight radial tip) — self-cleaning, moderate-dust, medium-high-pressure; the deliberate middle between backward (efficiency) and full radial (ruggedness). |
| Class (by pressure / outlet velocity) | Class 4–5 build for the 150 m/s tip — thicker plate, FEA on the higher-stress wheels, fine balancing; class selected from the duty point on the pressure-vs-outlet-velocity limits. |
| Materials of construction | MS (standard) / wear-plated WP with leading-edge hardfacing + bolt-in replaceable scroll liners for abrasive duty / SS304, SS316, Corten or duplex on the airstream for corrosion / FRP (F) for chemical service. |
| Construction & high-temp suffixes | HT (high-temperature / refractory-grade construction + shaft cooling disc above ~150 °C) / SR (spark-resistant, AMCA 99 Type A/B/C + ATEX self-declared) / F (FRP) / WP (wear-plated) — combined as the duty requires. |
| Drive | Direct-coupled / V-belt / VFD with shaft-earthing ring for variable duty. Drive up to 400 HP across the envelope; capacity trim by inlet / outlet damper or in-cone IGV. |
| 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. |
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.
Cement-mill and raw-mill vent, moderate-dust process draught.
Dust-laden process and sand-handling vent at medium-high pressure.
Dust-collection draught and AHU duty where moderate particulate rules out an aerofoil.
Spray / fluid-bed / flash drying on dust-laden product gas.
Ore and mineral dust collection at moderate loadings.
Mill-vent and dust-handling fans built to an APC builder's package spec.
Sludge drying and handling exhaust on dust-laden gas.
Moderate-dust, medium-high-pressure work. Tell us your gas and operating point.
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