We integrate the whole APC package. Do you supply just the fan sub-package to our design?
Yes. That is exactly the role we take. You own the collector, the train and the guarantee; we engineer, build, test and document the draught fan as a sub-package to your GA, your battery limits and your data-book, so it drops into the train you designed. We have executed 245 pollution-control duties this way, spanning ESP and baghouse main fans, pulse-jet draught, dirty-side dust extraction, weld/grind/EAF fume, FGD and scrubber boosters, corrosive-gas exhaust and biofilter odour control. Each fan is engineered to its own stream and resistance, on one engineering convention across your projects.
How do you make sure the fan actually meets the duty point we sized the package around?
We size the fan where its curve crosses the system resistance you state, so the operating point lands on the best-efficiency region of the selected wheel rather than being forced onto a catalogue fan. Then every fan is performance-tested in-house to the AMCA 210 / ISO 5801 method on our 200 HP VFD test rig before dispatch, and you are welcome to witness it. You see the curve and the balance report before the fan leaves the floor — so the guaranteed flow is proven on our rig, not discovered at your commissioning.
Our scrubber and FGD gas is saturated and corrosive. What metallurgy do you use?
We size the metallurgy and the dew-point margin to your gas analysis. On a wet scrubber, FGD or corrosive-gas exhaust the gas sits at or below the acid dew point (typically 120 to 150 °C), so we select 316L or Corten on the wetted surfaces, stepping to higher alloys on request, add a drain at the low point, and either insulate and heat-trace to hold the wall above dew point or build the fan to run wet. The right answer depends on your SO₂/SO₃, chloride content and moisture, so we engineer it to your stream, not a default.
The dirty-side fan takes the raw dust and fume. How do you protect the wheel and casing?
Ahead of the collector the fan takes the full raw stream, with heavy dust on dirty-side extraction and hard metallic weld or EAF fume, so we protect three ways sized to your loading. A rugged radial wheel that sheds dust and resists erosion; chrome-carbide hard-facing on the blade leading edges and high-wear zones; and bolted-in, replaceable AR wear plates and liners at the scroll throat and inlet with inspection and cleanout doors, so worn parts change out in place. The wear scope is replaceable, not welded in, which is what keeps the fan running the package's life.
Can you match an existing fan on a package we're retrofitting or a competitor's footprint?
Yes. We reverse-engineer to the existing duty point (flow, static pressure, gas temperature, density and dust load), bearing centres, inlet/outlet orientation and foundation bolt pattern so the unit drops onto the existing base and ducting — whether it is an ESP main fan, a baghouse draught fan, a scrubber booster or a fume fan. Made to your installation, not a nearest-catalogue substitute. 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). To be precise: that in-house testing is to the AMCA 210 / ISO 5801 method, not AMCA-certified, and we are not an AMCA member; 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 your area classification calls for it — those are self-declarations of conformity, not third-party certifications. Our only third-party certification is ISO 9001:2015.
