Wastewater · Diffused aeration
Ring Blower for STP
STP duty, sized right: continuous 24/7 fine-bubble diffused aeration. Real Yash models, oil-free where it matters, ISO 9001:2015 and built in Faridabad since 1998.
- Duty
- continuous 24/7 fine-bubble diffused aeration
- Airflow
- 200–2,000 m³/hr
- Aeration
- +300 to +600 mbar
DTYAir for the aeration basin
A sewage treatment plant's aeration basin is where the biology happens: the blower pushes air through fine-bubble diffusers to keep dissolved oxygen up for the micro-organisms that break down the load, around the clock. The pressure the blower must make is set by how deep the diffusers sit — roughly 100 mbar for every metre of water above them plus the diffuser's own resistance — and the airflow is set by the oxygen the process demands. That makes it a steady positive-pressure, continuous-duty job, and an oil-free ring blower is the standard package-plant answer: clean air to the diffusers, one moving part, and unbroken 24/7 running. Deeper municipal basins move up to a two-stage blower for the higher head.
Yash single-stage and double-stage ring blowers aerate STPs from rooftop package plants to municipal basins — oil-free air to the diffusers, sized to tank depth and BOD load, built for the continuous duty aeration never stops needing. ISO 9001:2015, made in Faridabad, supplied with the relief valve and filter the service needs, quoted in 24 hours.
MDLRecommended models
Real Yash models whose published specifications sit inside this machine's duty window. Every figure is from our catalogue — click any model number for its full datasheet.
Single Stage Turbine Blower
Full range →Oil-free air to fine-bubble diffusers in package and small-municipal basins around the 300–350 mbar band, on continuous duty.
| Model | Power | Flow (m³/hr) | Flow (CFM) | Vacuum (mbar) | Pressure (mbar) | Noise (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| YEBL-1-530 | 7.5 HP | 530 | 312 | -300 | 320 | 80 | 62 |
| YEBL-1-700 | 7.5 HP | 700 | 412 | -200 | 180 | 81 | 66 |
| YEBL-1-1050 | 11 HP | 1050 | 618 | -210 | 210 | 74 | 93 |
Double Stage Turbine Blower
Full range →Two stacked stages for deeper 4–5 m municipal basins that need 400–500 mbar-plus head against the water column.
| Model | Power | Flow (m³/hr) | Flow (CFM) | Vacuum (mbar) | Pressure (mbar) | Noise (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| YEBL-DS-320V | 7.5 HP | 320 | 188 | -440 | 500 | 73 | 70 |
| YEBL-DS-520 | 15.0 HP | 520 | 317 | -430 | 660 | 74 | 123 |
| YEBL-DS-900 | 15.0 HP | 900 | 529 | -280 | 370 | 74 | 110 |
SZESizing note
Set pressure from diffuser depth (about 100 mbar per metre plus diffuser loss) and airflow from the oxygen demand of the BOD load; hold dissolved oxygen at 1.5–2.5 mg/L. A relief valve caps back-pressure as diffusers foul.
Indicative only — final selection depends on your exact duty point, altitude and air temperature. Send the numbers and an engineer confirms the model.
FAQRing Blower for STP — FAQs
- What size blower does an STP need?
- Set the pressure from how deep your diffusers sit — about 100 mbar per metre of water plus the diffuser's resistance — and the airflow from the oxygen the BOD load demands. A single-stage ring blower covers shallow package basins; deeper 4–5 m municipal tanks move to a two-stage YEBL-DS blower for the head.
- Why oil-free blowers for sewage aeration?
- Diffused aeration runs continuously and the air goes straight into the biological process, so an oil-free ring blower keeps the air clean, has one moving part to service and is built for unbroken 24/7 duty. It is the standard, low-maintenance choice for package and small-municipal STPs.
REFExplore further
RFQ / Request for Quotation
Sizing a ring blower for your STP?
Send your duty point (200–2,000 m³/hr at +300 to +600 mbar), the machine make and your site voltage — an engineer sizes the exact model and quotes within 24 hours.