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Pumps & Compressors

Compressed Air Takes Pole Position

Zander-Hiross, specialists in the treatment of compressed air and gas, has supplied a KM75 adsorption heatless dryer for use on the Royal Research Ship RRS James Clark Ross, the British Antarctic Survey's modern, ice strengthened, multi-discipline oceanographic research vessel. Designed to operate in polar waters, the vessel can be easily driven at a steady two knots through level sea ice up to one metre thick.

The RRS James Ross Clark in the Antarctic. (Photo by Peter Bucktrout, British Antarctic Survey)
The RRS James Ross Clark in the Antarctic. (Photo by Peter Bucktrout, British Antarctic Survey)

The vessel is equipped for geophysical studies, with a compressor bank to power a large seismic air gun array, a large aft working deck area for deploying a wide range of equipment, plus stern and midship gantries.

Zander's KM 75 adsorption dryer is installed in the vessel's control air system, which controls the ship's actuators and control valves. The control air system is run by a single, air-cooled, rotary screw compressor that supplies clean, dry, oil-free compressed air to a single air receiver at an operating pressure of between 6.0 and 8.5 bar via a moisture separating chamber and a primary pre-filter and oil filter.

The air receiver has a 0.7m 3capacity and is designed to a 10 bar working pressure.

Relief pressure is set at 11 bar and the auto-drain traps and manual-drain valves are fitted in the receiver's base.

From the control air receiver, the compressed air passes through a secondary pre-filter and oil filter to Zander's KM75 adsorption heatless dryer. The KM75 desiccant dryer removes any further moisture to a dew point of -40ºC. The compressed air, which is now suitably conditioned to perform the arduous operations required on board, then enters three distribution manifolds for the rooms that house the auxiliary machinery, main alternator, and propulsion motor.

MJ Information No: 17225

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The RRS James Ross Clark in the Antarctic. (Photo by Peter Bucktrout, British Antarctic Survey)

Unless otherwise stated, all images copyright © Mercator Media 2008. This does not exclude the owner's assertion of copyright over the material.

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