IZ Southern Cross Windmill
Southern Cross Industries
A windmill-powered water pump.
The IZ Southern Cross Windmill, manufactured by Southern Cross Industries, is a water pumping windmill which operates a reciprocating pump for potable water pumping and stock watering applications. Windmills are available varying sizes from 8 – 14 ft (2.5-7.5 m) in diameter suitable for water depths of up to 100 m.
Countries where Southern Cross distributes products include South Africa, Botswana, Mozambique, Zimbabwe
Prices for the product (including the wheel, gearbox, tail, mastpipe and stub tower) are variable depending on the size of the windmill. As of June 2020.
- 8 ft – 1700 USD
- 10 ft – 2500 USD
- 12 ft – 4100 USD
- 14 ft – 5000 USD
A price quote can be obtained by filling out an online form specifying the site requirements.
Main competitors include: windpumps such as the Kijito 2008 windpump, Diesel powered water pumps and Solar powered water pumps.
Goal 6: Clean water and sanitation
Viable in regions where the wind speed exceeds 3 m/s (approx. 11 km/hr) for eight or more hours per day. Communities in regions lacking access to potable water or stock water for agriculture.
The IZ Southern Cross Windmill is manufactured in Southern Cross’s manufacturing facility in Bloemfontein, South Africa.
The IZ Southern Cross Windmill can be ordered from and is distributed by Southern Cross.
Description of the pump type
Power required, measured in watts
Manufacturer-specified discharge rate, measured at a specific head
Maximum depth of water the pump can pull
Piston nominal diameter, measured in centimeters
The Southern Cross IZ pattern windmills are made to 5 different sizes – 6 ft, 8 ft, 10 ft, 12 ft and 14 ft diameter of Wind wheel. The main benefits of the IZ Southern Cross Windmill include:
- Replaceable gearbox bearings without dismantling the mill engine.
- Completely enclosed, dust and weather proof engine.
- Strong tension arm windwheel with galvanised steel fans.
- Automatic oiling.
- Double reduced gears with machine cut teeth.
- All steel part heavily galvanised.
The product specifications depend on the requirements of the site. For example: Boreholes tested for a yield of 84 L/min at a depth of 30 m where the site requires 15,000 L/day, requires a design of:
- 12 ft (3.7 m) windmill.
- 90 mm pump.
- 64 mm pipe.
- 16 mm pump rod.
IZ Southern Cross selection criteria can be found here.
The bearings for the gearbox are replaceable, without the need to dismantle the mill engine.
The product can function for 50 years with maintenance.
The manufacturer performance targets include:
- Environmentally friendly/Green energy
- Suitable for almost any terrain
- Easy to install and maintain
No hazards listed by the designer.
The IZ Southern Cross Windmill can be applied to older Southern Cross towers or towers of any other make.
Baker, K., 2017, “From aesthetics to function, history to rarity: The significance of windmills“, 19th Australasian engineering heritage conference: Putting water to work: Steam power, river navigation and water supply. Mildura, VIC: Engineers Australia, pp. 20-35.
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