R.O. Energy Recovery Turbines

Calder Energy Recovery Turbines offer a great number of advantages to the Original Equipment Manufacturer (OEM) and Reverse Osmosis Plant end user.

Construction: At the heart of the Pelton Turbine is the precision cast Rotor with efficiencies up to 90%. As a result of a recent development program aimed at improving efficiency, a rotor design in 3D (CATIA® ) and direct machining of the blades, the highest level of precision is achieved. The horizontal split case design allows easy access for inspection. The wetted parts are manufactured of high grade Super-duplex or non-metallic materials. The complete rotor is statically and dynamically balanced. The shaft runs in heavy-duty self-aligning roller bearings. These bearings are located outboard of the turbine casing. Together with the sealing system incorporated in the bearing housing, the bearings are well protected against ingress of water so that even if a leak through the double labyrinth seal occurs, continued trouble free operation of the turbine is assured.

Standard Product Range for Sea Water

Efficiency: The high quality construction combined with precision engineered components provide high operational efficiency, typically up to 90 percent. This is only possible with the Calder design, that has been engineered specifically to operate at the performance ranges typically seen in the R.O. process. 

Return on investment: The moderate capital cost of our ERT and the high operational efficiency ensure an excellent return when energy saving is taken into account.

Working reliability: The simplicity of the Calder energy recovery turbines, having only one rotating element operating at a low speed, results in inherent reliability under continuous duty conditions. Many years of field experience is incorporated into the latest design of our turbine, to function efficiently, meeting all aspects of our customers essential requirements. The horizontal split design allows easy access for inspection.

Convenience of operation: The inlet nozzle of the turbine replaces the brine control valve. This adjustable nozzle allows operation of the turbine over a wide brine pressure range without significant efficiency losses. Adjustment of the nozzle can be done either manually or by an actuator.

Convenience of installation: The inlet flange is either a standard DIN or ANSI flange or a victaulic connection. The inlet manifold may be turned in 90° steps for connection from top, side or bottom. An outlet flange in DIN or ANSI for easy connection of a discharge pipe is included in the turbine supply. The outlet of the turbine is flanged for direct connection to the outgoing brine discharge. This sealed outlet ensures that no brine mist enters the plant environment.

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