One moving part, near zero maintenance
A single high-speed impeller with no belts or gears means very few failure points and essentially maintenance-free running.
Regenerative Air Blower
Compact, oil-free high-pressure air for tanks and hatcheries — a regenerative air blower (side channel / ring blower) that delivers clean, pulsation-free air at higher pressure than a paddle wheel but in a quieter, more compact package than a roots blower, ideal for single biofloc tanks, RAS sumps, hatcheries and diffuser grids, with a single moving impeller and near-maintenance-free operation.
- Power0.4–4.0 kW
- Air flow60–450 m³/h
- Pressureup to ~260 mbar
- DriveDirect · one moving part
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Due to the effect of centrifugal force, when the impeller rotates, the wind vane makes the air forward move and become a series of spiral movements. Spiral Air between the impeller blades will speed up rotates and sucks outside air into the side channel (via suction mouth). After the air is sucked into the side channel, it will be compressed and then return to between the impeller blades and speed up rotation again. When the air along a spiral orbit goes through the impeller and side channel, each impeller blade increased compression and speed, along with the rotation of air’s kinetic energy increased making the pressure of air that goes through the side channel increase. When the air arrives at the junction of side channel and discharge flange (the side channel will turn narrow at the exit) it will be pushed to mufflers and discharged out of the air blower.
Advantage:
- The air blower should be installed in a stable place, and the environment should be clean, dry, and ventilated
- The rotation direction of impeller blades has to same as the arrow direction marked on the air blower shell
- Working pressure cannot exceed 230Mbar, in case the air blower generates too much heat and motor overload then damage the air blower
- Please check and clear the filter and muffler, in case both of them are blocked.
- Solids, liquid, and corrosion gas are forbidden enter the air blower
Video of Product
Application
Package and Shipment
Specifications
Models & configuration
Model series integrated from the industry standard range as an indicative guide — actual ratings are confirmed by SIGMA before shipment.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-RAB-04 | Small tanks / nursery / aquarium | ||
| SIGMA-RAB-075 | Single biofloc tank | ||
| SIGMA-RAB-15 | Mid-size pond / multiple outlets | ||
| SIGMA-RAB-22 | Large tanks / RAS sump | ||
| SIGMA-RAB-40 | Large-pond aeration manifold |
| Type | Regenerative (side channel / ring) single-impeller blower |
|---|---|
| Drive | Direct drive — no belts, no gears, only one moving part |
| Air quality | Oil-free, pulsation-free, clean air |
| Body | Cast aluminium — lightweight and corrosion-resistant |
| Standard | Inlet/outlet filter-silencer |
| Options | VFD, pressure/vacuum gauge, stainless pipework, sound insulation |
| Voltage / frequency | 220 V single phase / 380 V three phase · 50/60 Hz |
| Water type | Freshwater / seawater (with corrosion-resistant diffusers and pipework) |
System composition
Clean, oil-free, pulsation-free air
Protects fish health, never fouls diffusers, and keeps dissolved oxygen delivery smooth and steady.
High pressure in a compact package
Pushes air to depth through diffusers at higher pressure than a paddle wheel, yet quieter and more compact than a roots blower.
Plug-and-play single phase
Small 220 V single-phase units run straight off ordinary farm power — direct drive, no setup.
Cast aluminium, light and corrosion-resistant
Easy to move and install; brackish and seawater duties covered with the right diffusers and pipework.
Flexible scale-up path
Run multiple ring blowers in parallel on a small farm, or step up to a roots blower as production grows.
Application
- Air source for single biofloc tanks and medium-density grow-out tanks
- Hatchery, nursery and larval-rearing air supply
- Air feed for RAS sumps, protein skimmers and oxygen cones
- Driving air-stone and nano-diffuser grids at small-to-medium scale
- Aquarium, live-fish holding and transport aeration
Video
Regenerative Air Blower
FAQ
Frequently asked questions
What is a regenerative (ring) air blower?
Also called a ring or side-channel blower, it moves air with a single high-speed impeller whose blades accelerate the air through a side channel, building clean, oil-free, pulsation-free air at relatively high pressure with only one moving part.
When should I use a ring blower instead of a Roots blower?
The regenerative blower suits small-to-medium and depth-sensitive duties — single Biofloc tanks, RAS sumps, hatcheries and diffuser grids — offering less volume than a Roots blower but a simpler, quieter, plug-and-play package.
Does the regenerative blower need much maintenance?
With a single moving impeller and no belts or gears, it runs quietly and is essentially maintenance-free; an inlet/outlet filter-silencer keeps the air clean and the noise low.
How is the blower sized?
SIGMA selects the unit by required air volume (m³/h) and pressure (mbar/kPa) at the diffuser depth and number of outlets, available in single-phase 220 V (small) and three-phase 380 V sizes.
Related equipment
Related equipment
Root Blower
High-efficiency roots blowers for biofloc, RAS & pond aeration. Direct-from-factory pricing, multiple capacities, worldwide export. Request specs & a quote from SIGMA engineers.
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Oxygen supply diffuse nano pipes for Biofloc fish farm
Micro/nano-bubble oxygen diffuser pipes & aeration hose for biofloc and pond fish farming — fine bubbles, high oxygen transfer, clog-resistant. Factory-direct from SIGMA. Get a quote.
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Dissolved oxygen cone
Oxygen / Speece cones that dissolve pure O2 for high-density RAS & biofloc farms. High transfer efficiency, multiple capacities. Manufacturer-direct from SIGMA. Request specs & a quote.
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Protein skimmer filter
Industrial protein skimmers / foam fractionators for RAS & marine aquaculture — removes dissolved organics, improves water clarity & oxygen. Factory-direct from SIGMA. Get a quote.
View details →Request a tailored quote
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