Site work for a water / sewer project in Grand Forks, North Dakota. Completed plans call for site work for a water / sewer project.

Vertical Dry Installed Pump for Wastewater Lift Station and Variable Frequency Drive The city reserves the right to reject any or all bids, or to accept the bid that is deemed to be in the best interest of the City. SUBMERSIBLE SEWAGE PUMP FOR VERTICAL DRY INSTALLATION - FLYGT NT 3301 MT OR APPROVED EQUIVILANT MEETING THE FOLLOWING SPECIFICATIONS A. The pump shall be equipped with a 70 hp submersible electric motor, capable to operate on a 460 volt, 3 phases, 60 hertz voltage supply. B. The hydraulic of the pump shall be capable of handling raw domestic wastewater with fibrous materials like wet wipes. C. The impeller blades shall be self-cleaning upon each rotation as they pass across a sharp relief groove in the Insert ring and shall keep the impeller blades clear of debris. D. The pump shall be capable to operate without any limitation between 50% and 125% of the Best efficiency point (B.E.P) of the performance curve. E. The required shaft power (P2) in the guaranteed duty point shall be less than 70hp. The motor speed shall be max.: 1200 rpm. A performance chart shall be provided upon request showing curves for torque, current, power factor, input/output HP and efficiency. This chart shall also include data on starting and no-load characteristics. F. The motor of the pump shall be induction type with a squirrel cage rotor, shell type design, housed in an air filled, watertight chamber. It shall be submersible according standard IEC 60034 and protection class IP 68. It shall continue to operate satisfactorily even when the station is subjected to a flooding and the motor is permanently submerged by a water column of 65 feet. Motors which only can be submerged for a limited time (IP 67) shall not be considered as equal. G. The motor shall be capable to operate the pump at continuous duty (S1) in an ambient temperature up to 10F. Operational restrictions or the demand of auxiliary cooling systems like fans or blowers are not acceptable. It shall be designed to run on an adjustable speed drive (ASD). H. Stator shall be insulated with class H trickle impregnated insulation rated at 356F. I. The junction chamber containing the terminal board shall be hermetically sealed from the motor by an elastomeric compression seal. Connection between the cable conductors and stator leads shall be made with threaded compression type binding posts permanently affixed to a terminal board. J. The motor shall be protected by 3 thermal switches embedded in the stator set to open at 284F (140C) and one leakage sensor floating type located in a leakage chamber below the main bearing. The sensor and the switches shall be connected to the control panel which shall stop the motor and send an alarm when the sensors are activated. K. The motor shall be capable of no less than 30 evenly spaced starts per hour and be able to operate throughout the entire pump performance curve from shut-off through run-out. L. The discharge flange of the pump shall be 10" and shall be drilled according ANSI B16.1-89; tab.5. The suction inlet of the pump housing shall be 10" and drilled to assemble a suction pipe with a 12" flange Bid result - Flygt NT 3301 MT 70HP Pump - Electric Pump LLC - $100,325.00 Schneider Electric ATV630 VFD - MP Predictive Technologies - $6,246.91