Centrifugal exhauster - radial shrouded
The last fan before the dust wins. Shrouded radial blades, wear-lined casing and a build that assumes the gas is dirty, because on this duty it is.
Illustrative 3D render of a representative shrouded radial exhauster build, not a photograph of a shipped unit.
Ranges are the family envelope our own product pages publish. The order always confirms against an approved GA drawing with the duty point, speed and absorbed power for your installation.
Selection logic
Radial blades with a shroud are the simplest heavy-duty wheel there is and the one that survives being fed real dirt. Straight blades, a cover plate over them, and a casing lined where the dust actually hits. Published envelope: 400 to 1,50,000 CMH at 100 to 2,000 mmWC, gas to 200 C on this build.
The design difference from a blower is the assumption of failure. Liners are bolted, not welded solid, so they come off. The inlet ring is a part number, not a repair. The blade tips are hard-faced where the measurement says they will wear, and the wear-part list is delivered with the GA drawing so stores can raise spares before the machine is needed.
A shrouded radial wheel can be pulled, inspected, re-tipped and put back inside one shutdown. That is usually the real requirement: not maximum efficiency, but the shortest unplanned stoppage.
Build
Duty fit
Coal and ash handling in power generation, steel and metal process exhaust, cement kiln and cooler duty, workshop and building extraction, railway shed and tunnel extraction, food and beverage dust and steam hoods. If the fan is downstream of a cyclone rather than upstream of a filter, this is the family.
Temperature above 200 C is where we stop and think: the same wheel with the hot-gas tier build (materials, clearance, bearing isolation) is usually the right answer rather than a different fan. Tell us both numbers – temperature and dust – and we will not guess between them for you.
Range
| Parameter | Industrial Exhauster Radial Shrouded Blower | Industrial Exhauster Air Handling Blower | High Pressure Radial Blade Blower |
|---|---|---|---|
| Airflow | 400 to 1,50,000 CMH | 1,750 to 2,30,000 CMH | 400 to 1,50,000 CMH |
| Static pressure | 100 to 2,000 mmWC | 25 to 406 mmWC (published as 1 to 16 inWC) | 100 to 2,000 mmWC |
| Gas temperature | Up to 200 C on this build; higher tiers by arrangement | Up to 200 C | Up to 200 C |
| Impeller / frame | Impeller 250 to 2,200 mm (range-wide) | Impeller 250 to 2,200 mm (range-wide) | Impeller 250 to 2,200 mm (range-wide) |
Blank cells mean the figure is not published for that family — ask us and we will confirm it against your duty.
Questions
Shrouded when there is dust to carry and wear to manage: the cover plate holds the blade root and stiffens the wheel. Open pockets go on the heaviest solids duty and on some conveying applications where plugging has to be possible.
Honest answer: it depends on your dust. We will tell you which parts we expect to replace first and quote them as spares, rather than promise a life we cannot control.
Yes. Send the drawing or let us survey. Common scope is a new lined wheel in the existing casing, upgraded bearings, and a hard-facing spec on the wear zones – which buys back most of the original performance at a fraction of a new machine.
Airflow and pressure are always quoted at the actual gas density. Altitude, temperature and duct losses move the number — run it through the worksheet before you send it.
Straight-through air at low pressure: tube axial, vane axial and propeller builds in mild steel and aluminium.
High static efficiency, non-overloading power curve. The default wheel for clean and lightly loaded air at medium to high pressure.
Flat plates set at an angle: robust, tolerant of moderate dust, still efficient and still non-overloading.
Enquiry
Tell us the duty and the constraints. You get a selection, a build sheet and a price from the works — not a call centre.
