Canned Motor Pumps For The Petroleum Industry

A range of heavy-duty canned motor pumps suitable for applications in the petroleum, chemical, gas and oil refinery sectors is now available from Michael Smith Engineers. The Nikkiso-KSB API 685 canned motor centrifugal pump is designed to be compliant with the American Petroleum Industry specification API 685 for seal-less centrifugal pumps. The pumps can be used for transferring hydrocarbons, liquids with a low boiling point, liquefied gases, heat transfer media and also liquids containing solids.

The pumps, which provide flow rates up to 360m3/h and heads up to 220m, are designed for system pressures up to 40 bar and can withstand nozzle moments and forces four times higher than required by API 685. The pumps have centreline supported casings and include wear rings located on the casing as well as the casing cover, helping to minimising maintenance costs. The pumps incorporate an automatic thrust balancing system that allows the bearing/thrust washer to function at minimised thrust loads over the entire usable capacity range to ensure optimum pumping performance.

The Nikkiso-KSB canned motor pumps come with an 'E' monitor with an LED display (local or remote), which indicates the axial and radial rotor position during pump operation alerting users to possible bearing wear, helping to prevent motor stator damage or failure that can cause unscheduled downtime. The Nikkiso-KSB API 685 canned motor centrifugal pump range is designed for mounting horizontally. A vertical configuration with in-line suction and discharge ports is also available. All the pumps offer secondary containment as standard.

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