Ballast Pump · Pumps
This product is an end-suction centrifugal pump designed for marine applications. It is manufactured by Grundfos under the designation NK / NB Marine. This pump is available in a range of sizes, with DN dimensions from 32 to 150 millimeters. The NK / NB Marine is capable of moving between 30 and 800 cubic meters of water per hour, and can achieve a head pressure of up to 80 meters. These pumps are driven by electric motors and constructed from cast iron and bronze. Introduced in 1990, the NK / NB Marine has seen a significant number of variants developed, with approximately 100 different models available. Common issues with this pump type include mechanical seal leakage, motor bearing wear, impeller wear, and cavitation damage. Grundfos supports the NK / NB Marine with a global service network and readily available spare parts through chandler stock. Standard service recommendations include replacing the seal every 8,000 hours and adhering to the motor's manufacturer-specified bearing replacement schedule.
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Standard service: seal 8000h, bearings per motor schedule.
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