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Delivering an extensive range of sustainable solutions to government entities and businesses across New Zealand, Australia, the Pacific Islands, and the United Kingdom through our specialised market subsidiaries.

Explore our divisions to choose your preferred solution provider:

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Working across all industries including meat processing, dairies, general food processing, beverage, manufacturing, power and infrastructure construction our industrial water, wastewater and sludge handing specialists deliver sustainable design, equipment and turnkey solutions.

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Specialists in identifying sustainability risks and opportunities in your business, uncovering opportunities for sustainable growth, resource efficiency, water security and discovering ways to maintain your profitability and growth in a changing and increasingly challenging environment.

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System operation specialists providing expert support, servicing, OEM spare parts, chemicals, and operation contracts to industrial and municipal water and wastewater customers. We are the key link integrating the Hydroflux Group businesses by providing a comprehensive support network for our clients.

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System operation specialists providing expert support, servicing, OEM spare parts, chemicals, and operation contracts to industrial and municipal water and wastewater customers. We are the key link integrating the Hydroflux Group businesses by providing a comprehensive support network for our clients.

Visit New Zealand

Visit Australia

Visit Fiji
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Sand Screw Separators

Sand Screw Separators are used for removing fast settling solids, such as sand from influent of sewage treatment and industrial wastewater plants.

The settled material is transported via by a shaftless screw conveyor from the separator, as wet solids and the effluent is returned into the process.

The screw is only supported by a bearing at the drive-end. The advantage of this is that the larger particles cannot jam between the screw and trough.

The sand screw separators are available in a range of sizes from 35m3/hr to a maximum capacity of 125 m3/hr, dependent on type and the settling velocity of the material to be removed.

Dutch Spiral has over 50 years of experience in design, manufacture and installation of shaftless screw conveyors and systems. Our competence lies with strong engineering, inhouse production experienced installation, providing for a high level of service.