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Electric Actuators

Actuators Protect Groundwater

| Editor: Dominik Stephan

Modular design makes it possible: Tight space around pit-mounted sluice gates at the Hallsberg railway yard in Sweden made actuator positioning a challenge.
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Modular design makes it possible: Tight space around pit-mounted sluice gates at the Hallsberg railway yard in Sweden made actuator positioning a challenge. (Source: Auma)

Electric actuators help to cut the risk of water pollution at Hallsberg junction, the largest railway yard in Scandinavia: In June 2017, actuator specialist Auma supplied three SA 10.2 multi-turn actuators with GST 10.1 spur gearboxes and AC 01.2 controls with Modbus interfaces to Trafikverket, the Swedish transport authority.

The Swedes needed to be sure that in the event of an accident, fuel, chemicals and other spilled liquids do not contaminate the environment. The railway yard therefore has a drainage system for contaminated water: Instead of leaking into surface streams or groundwater, contaminated water flows into an underground chamber from where it can be disposed of.

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As part of an project, Trafikverket asked Auma to automate three existing 800 x 800 mm sluice gates mounted in pits below ground level. A requirement was that the actuators should allow local as well as remote operation, and be able to withstand temporary submersion. The SA 10.2 actuators and their accessories fitted the bill, but there was a challenge: the narrow gap between each gate and the pit cover made installation tricky. Service technician Mikael Randestam took advantage of Auma’s modular design, which provides great flexibility in mounting positions, mounting the actuators downwards so that they fit the available space – an unconventional, but effective solution.

Electric Actuators Can Do Even More

Auma has also enhanced its SA actuator range with variable speed models. The new SAV multi-turn actuators for open-close duty and SARV multi-turn actuators for modulating duty are combined with intelligent ACV actuator controls, providing full control of the motor speed at any time., allowing the optimum operating speed to be selected for each change of valve position.

Auma at IFAT 2018: Hall C2/Stand141/240

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