Municipal Administration And Water Supply Department Tender

Supply and Delivery of Submersible Centrifugal Sewage Non Clog Pumps Supply and delivery of submersible centrifugalsewagenon-clogpumps, vertical spindle type pump,we arresistance with submersible motor for the variousduty conditions as stated in the annexure. Pump shall be capable of handling min 100mm solid size with sewage specific gravity of upto1.05. Pump shall be of robustconstruction. Liquid passages shall be finished smooth and designed as to allow free passage to solids.Pump Impeller should be of Non-clog semiopen type, single vane/multivane preferably contrablocorvortex impellerdesign. Double mechanical seal with silicon carbide faces should be provided to protect themo to from ingress of sewage along the shaft. The critical speed of the rotor shall be atleast 30% above the operating speed. Pump stohave double bearings betweenthe pump&motor. The bearings life shall be minimum 100,000hrs of operation with greased for life. Pump should be provided with automatic coupling device including pedestal, duck footbend, stainless steel guidepipe or related accessoriesof suitablesize to facilitate lifting and lowering into guiderails for easy Pump shall be provided with as tainless steel lifting chain conforming to BS970Gr 304.Pump speed shall be of 9600 rpm for high duty pump sand 960/1450rpm for lowduty pump sets.Casing and impeller shouldbe ofCIGr. FG260:IS210 more preferably with hardened impeller. Shaft should be of stainless steel AISI410. All the fasteners and bolts shall be of AISI410. The submersible motor shall be operated with 3ph,415V(+or–10%), 50Hz(+or-dryin duction type. Motor shall be capable of givin grated output without reduction in the expected life span when operated continuously. The rotating assembly shall be dynamically balanced as per standards. The starting current of the motor shall not exceed 200% of rated full load current for Star/Delta or ATS starting under any circumstances. The motor shall be suitable for full voltage star delta/ATS starting.The locked rotor current of the motor shall not exceed 600% of full load current unless otherwise specified. Motor shall be designed to withstand 120% of rated speed for two minutes with out any mechanical damage, ineither direction of rotation.The motor vibration shall be with in the limit specified in applicable standards. Motor should be of IE2, explosion proof compatible for VFD operation together with star-Delta/ATS starter, protection against increase in stator winding temperature (15degCelsius), bearing temperature, leakage in the stator housing and terminal box shall be provided and to be suitably inter locked with the control panel for tripping the pump incase of increase in temperature beyond set limit. Insulation class shall be of“ ClassH”anddegreeof -- Discharge 100 to 200 M3/hour.maintenance. Discharge upto 20 M3/hour

Discharge 100 to 200 M3/hour

Supply and delivery of Star-Delta starter confirming to IS 13947, IEC60947-1 and as amended thereafter with suitable KW rating for operation in AC/ Three Phase/50HZ (+/- 5%) and 415V (+/- 10%) including 3 pole magnetic contactor with under voltage release - 3 nos., CT operated Ammeter (65 mm dia) with suppressed scale, Voltmeter (65mm dia), Voltmeter selector switch, Miniature circuit breaker, Thermal Overload relay, Air Break contactors suitable for next Standard higher KW rating, Single phasing preventor, dry running preventor and On/Off Push button switches, wiring with 1 sq.mm/4 sq. mm copper pvc insulated cable, powder coated vermin proof box, including the capacitor (the cost of capacitor is to be taken separately).