tender for supply and delivery of submersible centrifugal sewage non-clog pumps, vertical spindle type pump , wear resistance with submersible motor for the various duty conditions. pump shall be capable of handling min 100 mm solid size with sewage specific gravity of up to 1.05. pump shall be of robust construction, liquid passages shall be finished smooth and designed as to allow free passage to solids. pump impeller should be of non-clog semi open type , single vane / multi vane preferably contra bloc or vortex impeller design. double mechanical seal with silicon carbide faces should be provided to protect the motor from ingress of sewage along the shaft. the critical speed of the rotor shall be at least 30% above the operating speed. pumps should have double bearings between the pump & motor. the bearings life shall be minimum 100,000 hrs of operation with greased for life. , supply and delivery of direct online starter confirming to is13947, iec60947-1 and as amended thereafter with suitable kw rating for operation in ac/three phase/50hz(± 5%) and 415 v(±10%) including ammeter, voltmeter, thermal overload relay, 16 amps 2 pole magnetic contactor with under voltage protection, indication lamp, starting capacitor, running capacitor and on/off push button switches, 5 way connector, wiring with 1 sq. mm/1.5 sq. mm copper pvc insulated cable, powder coated vermin proof box including the capacitor (the cost of capacitor is to be taken separately). , ductile iron socket/spigot pipes for class k7 , eb service , 63a fuse carrier , pillar box , 25sq.mm armourer cable , 2 service line pipe 20 ft , 4 pole elcb breaker ( abb)