EDDY PUMP - Success Stories ...

USS Kearsarge (LHD-3) Brine Pump Success Story

Santee, California, 1/31/02 - In July 2000, USS KEARSARGE (LHD-3), replaced two deteriorated brine pumps on number (1) and (2) distilling units with two EDDY PUMP Systems. The EDDY PUMP Systems have been in use aboard USS KEARSARGE for over eighteen months, for approximately 7,000 hours of maintenance free operation. During a recent six-month deployment the EDDY PUMP Systems operated continuously twenty-four hours per day for seven days a week. The USS Kearsarge chose EDDY PUMP Systems based on their success in the ship's CHT sewage transfer system and the
USS John F. Kennedy (CV 67) 3,000 hour brine pump test in 1998-1999.



Dredge Demonstration

Road Traveler is a small portable dredge used to demonstrate the benefits of EDDY Pump technology in dredging applications. The dredge features a 6' pump powered by a 160 HP hydraulic power unit.

In Texas, the dredge pumped coal tailing slurry with a solids content of 55% by weight. The unit moved 200 cubic yards of material per hour at 1,200 GPM.

At a Wyoming site, Road Traveler pumped material with a solids content of 79% by weight with peaks close to 90%. The dredge moved 187 cubic yards of material per hour at a flow rate of 1,000 GPM.


EDDY Pump System NF-4000 for U.S. Navy

Centrifugal discharge pumps installed in aircraft carrier sewage Collection, Holding, and Transfer (CHT) systems were experiencing a high rate of seal failures within a short time period after seal installation. A significant maintenance effort was required to replace the failed seals. In addition, the normal operation of these pumps resulted in the leakage of sewage material into the CHT pump room in violation of Navy health regulations. The total carrier fleet maintenance burden to overhaul the pumps and replace seals was estimated to cost the Navy about $750,000 per year.

The Navy's PERA(CV) organization and Newport News Shipbuilding identifed the EDDY Pump as being capable of meeting the zero external leakage health criteria and eliminating the problem of seal failures. EDDY Pump NF-4000 pump systems have been installed in several aircraft carriers in the fleet and are scheduled to replace existing CHT discharge pumps on all carriers. The NF-4000 pump system features a 5' intake and a 4' discharge, a 40 HP motor, and a combined electric and low pressure air supply controller.

EDDY Pumps have been in service on aircraft carriers for several years. There has been no seal leakage or need to overhaul the pump systems. Seal cartridges on one carrier showed increased air flow and were replaced after 18 months of service. These replacements were attributed to a need for clarification of preventive maintenance greasing requirements. The simple design of the pump and the seal cartridge allows for easy service and maintenance if it should be required. Seal cartridges can be economically rebuilt providing further cost savings to the Navy.

Ship's force have enjoyed the benefits of the zero leakage, low maintenance pump systems with cleaner CHT pump rooms and reduced exposure to sewage. The Navy is realizing significant improvements in CHT system reliability and a substantial reduction in fleet maintenance life cycle costs.