AIRFIN Hub
Fine bubble tubular aeration diffuser available in 1.4 m and 2.2 m lengths with EPDM, HTPU, and PTFE membrane options for high-efficiency oxygen transfer.
The AIRFIN Hub is a fine bubble tubular aeration diffuser designed for high-efficiency oxygen transfer in wastewater treatment applications. Available in two lengths — 1.4 metre and 2.2 metre — the Hub features a Ø63 mm membrane mounted on an ABS + uPVC Ø63 mm OD support pipe. Multiple perforation sizes (0.65, 1.0, 1.2, and 1.5 mm) allow the diffuser to be matched precisely to the process oxygen demand and air flow conditions.
The Hub 2.2 delivers an air flow range of 4–20 m³/hr per diffuser with an active surface area of 0.42 m² and achieves a SOTE of 27 % at 3 m depth with 1 mm perforation. The Hub 1.4 delivers 2–15 m³/hr per diffuser with 0.26 m² active surface area and 16.2 % SOTE at 3 m depth. Both models produce fine bubbles of 1–2 mm diameter for maximum oxygen dissolution.
Membrane material options include EPDM, EPDM Pro, HTPU, and PTFE — enabling compatibility with a wide range of wastewater chemistries from municipal sewage to aggressive industrial effluents. The diffuser incorporates backflow prevention features and a self-purging system for reliable long-term operation with maximum life expectancy of 7–8 years at regular cleaning frequency.
Lightweight at 4 Kg (Hub 2.2) and 2.4 Kg (Hub 1.4), the AIRFIN Hub is factory assembled for ease of installation and is compatible with both fixed and retrievable aeration system layouts. Applications include activated sludge systems, oxidation ponds, aerated lagoons, aerobic digesters, municipal and industrial wastewater treatment, and aquaculture.
Key features
- Available in two lengths — 1.4 metre and 2.2 metre — to suit varying tank geometries and aeration layouts
- Ø63 mm membrane ID with ABS + uPVC Ø63 mm OD support pipe for robust construction
- Multiple perforation sizes of 0.65, 1.0, 1.2, and 1.5 mm to match specific process requirements
- High active surface area of 0.42 m² (Hub 2.2) and 0.26 m² (Hub 1.4) for maximum oxygen transfer
- Air flow range of 4–20 m³/hr per diffuser (Hub 2.2) and 2–15 m³/hr per diffuser (Hub 1.4)
- Fine bubble size of 1–2 mm ensures high oxygen dissolution and transfer efficiency
- SOTE of 27 % at 3 m depth with 1 mm perforation for the Hub 2.2 model
- Typical standard aeration efficiency of 9.8–8 Kg O₂/KWh (Hub 2.2) and 6–5 Kg O₂/KWh (Hub 1.4)
- Available in EPDM, EPDM Pro, HTPU, and PTFE membrane materials for diverse wastewater chemistries
- Lightweight design — 4 Kg (Hub 2.2) and 2.4 Kg (Hub 1.4) — for ease of installation and handling
- Compatible with fixed and retrievable aeration system layouts
- Backflow prevention features and self-purging system for reliable long-term operation
Outcomes
- High oxygen transfer efficiency reduces blower energy consumption and operating costs
- Wide air flow range per diffuser allows flexible system design for varying oxygen demands
- Multiple membrane material options ensure chemical compatibility across diverse industrial effluents
- Lightweight and factory-assembled construction reduces installation time and labour costs
- Maximum life expectancy of 7–8 years with regular cleaning frequency minimizes replacement costs
Who it's for
Municipal sewage treatment plants, industrial effluent treatment plants, activated sludge systems, oxidation ponds, aerated lagoons, aerobic digesters, food and beverage industries, pharmaceutical industries, pulp and paper mills, chemical industries, textile industries, leather industries, and aquaculture facilities.
Models & variants
Two tubular fine-bubble hub diffuser models — 1.4 m and 2.2 m lengths — covering air flows from 2 to 20 m³/hr.
Ø63 mm tubular fine-bubble diffuser, 2200 mm length, for higher oxygen transfer and larger tank layouts.
| Spec | Value |
|---|---|
| Size | Ø63 × 2200 mm (2.6" × 86") |
| Membrane ID | Ø63 mm |
| Perforation length & count | 1000 + 1000 mm / 28,160 nos. |
| Perforation size | 0.65 / 1 / 1.2 / 1.5 mm |
| Active surface area | 0.42 m² |
| Air flow range / diffuser | 4–20 m³/hr |
| Bubble size | 1–2 mm |
| Standard design flow @ 3 m | 20 m³/hr |
| SOTE @ 3 m (1 mm perforation) | 27% |
| Typical standard aeration efficiency | 9.8–8 kg O₂/kWh |
| Area of influence | 0.4–3.5 m² |
| MOC of support pipe | ABS + uPVC – Ø63 mm OD |
| Weight | 4 kg |
Applications
Activated sludge systems
Aeration of mixed liquor in conventional and extended aeration activated sludge processes.
Municipal sewage treatment
Fine bubble aeration in STP aeration tanks for biological oxygen demand reduction.
Industrial effluent treatment
Oxygen transfer in ETP aeration basins for food, pharmaceutical, chemical, textile, and leather industries.
Oxidation ponds & aerated lagoons
Supplemental aeration in stabilization ponds and aerated lagoon systems.
Aerobic digesters
Aeration for aerobic digestion of biological sludge and waste activated sludge.
Aquaculture
Dissolved oxygen enrichment in fish and shrimp farming ponds and hatcheries.
Focus areas
- Waste Water Treatment