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
A regenerative air blower (ring or side-channel type) has a single high-speed impeller with no belts or gears, so it runs quietly, oil-free and with almost no maintenance. It delivers pulsation-free air at higher pressure than a paddle wheel in a compact package, suited to single biofloc tanks, RAS sumps, hatcheries and diffuser grids from 0.4 to 4.0 kW.
- 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 | 0.4 kW · 60–80 m³/h · 90–140 mbar | Small tanks / nursery / aquarium | Single-phase 220 V |
| SIGMA-RAB-075 | 0.75 kW · 90–120 m³/h · 120–160 mbar | Single biofloc tank | Single / three phase |
| SIGMA-RAB-15 | 1.5 kW · 150–210 m³/h · 160–210 mbar | Mid-size pond / multiple outlets | Three-phase 380 V |
| SIGMA-RAB-22 | 2.2 kW · 210–280 m³/h · 180–230 mbar | Large tanks / RAS sump | Three-phase 380 V |
| SIGMA-RAB-40 | 4.0 kW · 320–450 m³/h · 200–260 mbar | Large-pond aeration manifold | Three-phase 380 V |
| 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.
Is a regenerative blower the same as a side channel blower, and does SIGMA manufacture them?
Yes — regenerative blower, ring blower and side channel blower are all names for the same single-impeller, oil-free air blower technology. SIGMA sources these units from established side channel blower manufacturers and supplies them under our own brand with full after-sales support. The regenerative type suits single biofloc tanks, hatcheries, RAS sumps and small-to-medium diffuser grids (0.4–4.0 kW range), while larger farms typically step up to a roots blower for greater air volume.
Related equipment
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View details →Request a tailored quote
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