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Spiral Aerators can be installed rapidly and painlessly in almost any wastewater treatment system. They are exceptionally reliable and provide efficient aeration with strong directional mixing. These features make them particularly useful in emergency situations where other aeration plant has broken down or needs supplementing, and where
Originally designed for mixing animal slurry and sludge, the Spiral Aerator design has a strong emphasis on extremely low maintenance and an efficient, anti-rag impeller. Although very few are now used for this purpose, their reliability and low-maintenance design
Spiral Aerators have no submerged bearings or couplings, which are the traditional source of maintenance problems. Only stainless steel and GRP components are used below the water level.
Thanks to the iconic forest green GRP floats, these versatile aerators are perfectly suited for lagoons and tanks with fluctuating water levels. A bracket-mounted option is also available for mounting to a bridge structure or tank wall where the water level is constant.
Spiral Aerators have been used in an incredibly wide range of applications, from polluted surface water lagoons at several major UK airports to large oil refineries, from sewage works to landfill leachate lagoons.
These unique and versatile aerators remain a very popular choice worldwide.
* Typical example. May depend on equipment availability, and site conditions such as availability of power supply,
FEATURES | ASSOCIATED BENEFITS |
---|---|
Powerful horizontal flow, giving excellent mixing and oxygen dispersion capabilities |
Prevents dead zones and reduces settlement, resulting in improved treatment performance |
No immersed motors, bearings or seals |
Reduces risk of equipment failure resulting in maintenance cost savings |
No splashing or release of spray |
Reduces environmental and health issues associated with bio-aerosol release |
No scheduled maintenance requirements and long service life |
Gives maintenance cost savings and allows reliable unattended operation |
All wetted parts stainless steel or GRP |
Reduces risk of corrosion, giving an extended asset life |
Precision German engineering |
Robust design and reliability ensures long asset life |
Helicoid spiral propeller |
Reduces risk of ragging with associated efficiency and maintenance benefits |
‘Unsinkable’ foam-filled float assembly |
Easy to install and relocate in ‘live’ tanks; remains at optimum immersion depth in spite of fluctuating water levels |
No on-site assembly needed |
Allows rapid installation and cost-effective installation |
Stainless steel feet |
Prevents aerator from grounding, even in very shallow water |
|
WBL-I |
WBL-Is |
WBL-II |
WBL-III |
WBL-IV |
WBL-V |
WBL-VII |
WBL-X |
WBL-XV |
WBL-XVIII |
WBL-XXII |
Total kW |
1.1 |
1.5 |
2.2 |
3 |
4 |
5.5 |
7.5 |
11 |
15 |
18.5 |
22 |
Full Load Current (FLC) (A) |
2.5 |
3.5 |
4.6 |
6.3 |
9.3 |
10.6 |
14.3 |
20.5 |
28.5 |
35.0 |
41.0 |
Start Up Current Star Delta (Y-Δ) (A) |
|
|
|
|
|
29 |
36 |
49 |
82 |
84 |
93 |
Start Up Current Direct on Line (DOL) |
|
|
36 |
44 |
86 |
88 |
106 |
145 |
246 |
252 |
279 |
Start Up Current Soft Starter (max current set point) (A) |
|
|
14 |
19 |
28 |
|
|
|
|
|
|
Electrical Supply Connector Size (A) |
|
|
16 |
16 |
16 |
16 |
16 |
32 |
32 |
63 |
63 |
Suggested Generator Size Star Delta (Y-Δ) (kVA) |
|
|
|
|
|
21 |
25 |
34 |
57 |
58 |
65 |
Suggested Generator Size Direct on Line (DOL) (kVA) |
|
|
25 |
30 |
60 |
61 |
73 |
100 |
170 |
175 |
193 |
Suggested Generator Size Soft Starter (kVA) |
|
|
10 |
14 |
20 |
|
|
|
|
|
|
Float-mounted Weight (kg) |
160 |
166 |
170 |
350 |
360 |
370 |
|||||
Water Depth (Feasible) |
1.0 m - 4.0 m |
1.8 m - 4.5 m |
2.0 m - 6.0 m |
||||||||
Water Depth (Recommended) |
1.5 m - 3.0 m |
2.0 m - 3.5 m |
2.5 m - 4.0 m |
Where are Spiral Aerators used? |
Why are they selected? |
Oxidation ditches and carousels |
Horizontal aeration and mixing |
Annulus tanks (‘doughnuts’) |
Ease of installation |
Aeration lanes |
Emergency hire |
Shallow tanks |
Reliability |
Remote/unmanned sites |
Low maintenance |
Temporary or supplementary aeration |
Lagoons |
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VAT Number: 756 1626 20
Company Number: 621 8442
Phone: +44 (0)1785 229300
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