Can you supply the fans across the whole pharma plant, or only one duty?
Across the whole plant, on both sides. We have executed 73 pharmaceutical duties spanning cleanroom and pharma AHU supply, AHU supply and return, lab and fume-hood exhaust, corrosive solvent and scrubber-vent exhaust, dirty-side dust collection, spray/fluid-bed/flash dryer process air, and general and dilution ventilation. The clean quiet supply fan and the ATEX solvent exhaust fan are different machines built to opposite requirements — but they come from one partner, on one engineering convention across the site.
How do you keep a supply fan GMP-clean and cleanable?
We build the supply-side fan to shed nothing and to survive wash-down. Smooth, crevice-free construction with no dirt traps; 304 or 316L stainless on the wetted and cleaned surfaces; sealed bearings kept out of the airstream; and coatings chosen so the wheel and casing do not flake, rust-bloom or shed particles into HEPA-filtered supply air. The finish and material are specified to your cleanliness grade and sanitisation regime, not a default, so the fan does not become a contamination finding.
Our solvent exhaust and dust collectors are classified areas. Do you build ATEX fans?
Yes. Where the area classification calls for it we build the exhaust or dust-collection fan as ATEX Zone 2/22 self-declared per 2014/34/EU (Category 3): a spark-resistant impeller and casing pairing, controlled tip-to-casing clearance so metal cannot rub, full earthing and bonding to bleed static, and antistatic belts where fitted. Solvent vapour is typically a Zone 2 gas risk and combustible API or excipient powder on the collector a Zone 22 dust risk; on corrosive or wet-scrubbed streams we also step the wetted metallurgy up to 316L or higher. To be precise, that is a self-declaration of conformity, not a third-party certification. Tell us the zone, the gas or dust group and the temperature class and we build the fan to it.
The supply fans sit next to cleanrooms and offices. How do you keep them quiet and efficient?
We select a high-efficiency aerofoil wheel and engineer your duty onto its best-efficiency point, which is also its quietest region, so the fan meets the site noise limit — typically 75 dB(A) or below — without bolting on a silencer. The wheel is balanced to ISO 21940 G2.5 for smooth, low-vibration running, which matters for a fan that runs 24x7 for the validated life of the room. Getting the selection right the first time also avoids re-selecting a fan later, which would mean re-validating the room.
Can you build a replacement to match our existing pharma fan's duty and footprint?
Yes. We reverse-engineer to the existing duty point (flow, static pressure, temperature, density and any dust or solvent load), bearing centres, inlet/outlet orientation and foundation bolt pattern so the unit drops onto the existing base and ducting — whether it is a cleanroom supply fan, a fume-hood exhaust, a dust-collection fan or a dryer fan. Made to your installation, not a nearest-catalogue substitute, so you avoid disturbing a qualified AHU or duct run. Send the old GA, the nameplate and a curve if you have one, and we match it.
Do you performance-test the fans, and what about AMCA, CE, ATEX and quality certification?
Every fan is performance-tested in-house to the AMCA 210 / ISO 5801 method on our 200 HP VFD test rig, and dynamically balanced to ISO 21940 G6.3 as standard (G2.5 / G1.0 on application, which is what the quiet supply duty gets). To be precise: that in-house testing is to the AMCA 210 / ISO 5801 method, not AMCA-certified; CE is self-declared per 2006/42/EC and 2014/35/EU, and ATEX Zone 2/22 is self-declared per 2014/34/EU (Category 3) where the area classification calls for it — those are self-declarations of conformity, not third-party certifications. Our only third-party certification is ISO 9001:2015.
