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6.01 IMPELLER The impeller shall be class 25 gray cast iron with pump out vanes on the back shroud to keep debris away from the seal area. It shall be keyed and bolted to the motor shaft. 7.01 CUTTER MECHANISM The cutter and plate shall be of the V -Slice® design and consist of 440 stainless steel with a Rockwell C hardness of 55-60. The stationary cutter plate shall have specially designed orifices through it, which enable the slurry to flow through the pump housing at an equalized pressure and velocity. The stationary cutter shall consist of V shapes to maximize cutting action and arc shape exclusion slots to outwardly eject debris from under the rotary cutter. The rotary cutter shall have (2) blades and be designed with a recessed area behind the cutting edge to prevent the accumulation and binding of any material between rotary cutter and the stationary cutter. The cutting system must incorporate close tolerances for optimum performance. Ring or radial cutters, or those that grind on the outside circumference of shall not be considered equal. 8.01 CONTROLS All single phase units can be supplied with CSA and UL approved automatic wide angle tilt float or pre -assembled HD vertical switches. The switches shall be equipped with piggy back style plug that allows the pump to be operated manually without the removal of the pump in the event that a switch becomes inoperable. Manual Pumps are operable by means of a pump control panel. 9.01 PAINT The exterior of the casting shall be protected with Powder Coat paint. 10.01 SUPPORT The pump shall have cast iron support legs, enabling it to be a free standing unit. The legs will be high enough to allow solids and long stringy debris to enter the cutter assembly. 11.01 SERVICEABILTY Components required for the repair of the pump shall be shipped within a period of 24 hours. 12.01 TESTING The pump shall have a ground continuity check and the motor chamber shall be Hi -potted to test for electrical integrity, moisture content and insulation defects. The motor and volute housing shall be pressurized, and an air leak decay test is performed to ensure integrity of the motor housing. The pump shall be run, voltage current monitored, and the tester checks for noise or other malfunction. 13.01 QUALITY CONTROL The pump shall be manufactured in an ISO 9001 certified Facility. 14.01 WARRANTY Standard limited warranty shall be 3 years. PRG 100_ R6/6/2017 OCopyright 2017 Liberty Pumps Inc. All rights reserved. Specifications subject to change without notice. �ert Pumps-