Specifications

Document No. DER01321 SERVICES & UTILITIES REQUIRED

Page 2 of 2 Effective Date 30 Aug 07

FEED PUMP

The customer is required to supply a positive-displacement feed pump for delivering slurry to the

centrifuge. A progressing cavity pump having a fixed ratio gearbox and 30 HP maximum inverter-

duty pump drive motor is recommended. The motor must be capable of operating in the 180 to

2700 RPM, 6 to 90 Hz speed range and also meet all other application requirements including

voltage, frequency, and area of classification. The pump size, motor, and gearbox ratio must be

chosen to deliver the maximum desired flow at a pump rotor speed (determined by the

manufacturer) to be low enough to prevent accelerated wear of the rotor and/or stator.

The pump must be connected to the centrifuge’s control system as described in

DER03022, so

that its operation can be supervised by the centrifuge.

The content of this document is subject to change at any time. Information provided does not cover all details or variations possible

with DERRICK equipment, nor does it cover every contingency that may be met in conjunction with installation, operation,

maintenance, or troubleshooting of the equipment. Should additional information be required, or should situations arise that are not

covered by this manual, bring the matter to the attention of your local DERRICK representative or the Service Department at

DERRICK Corporation in Buffalo, New York.