Tender For corrigendum : e-tender with forward bidding for the sale of granite waste which means irregular pieces of granite which are not capable of being sold as dimensional granite block that may be used as road metal or a raw material for production of manufactured sand
Tender For supply and delivery of safty arrangements for north east mansoon in virudhunagar municipality - supply and delivery of suction pipe including cost of all charges etc.,complete, supply and delivery of suction foot valve including cost of all charges etc.,complete, supply and delivery of nylon rope including cost of all charges etc.,complete, supply and delivery of torch light including cost of all charges etc.,complete, supply and delivery of power saw including cost of all charges etc.,complete, supply and delivery of crow bar including cost of all charges etc.,complete, supply and delivery of spader including cost of all charges etc.,complete, supply and delivery of iron tasla including cost of all charges etc.,complete, hsn:84137010 model no: eterna 1800bw kirloskar make 1.8kw/2.5hp 1 ph 230v waste disposer pump , size :65mm, removal of centrifugal pumpset/ jet pumps/ submersible pumpsets and its accessories from borewell/ open well for attending repairs 50% of the rates mentioned under item 17 (a), (b) and (c) may be allowed for the respective horse power twad sor 22-23 pg.no:308, 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 beprovided 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. pump should be provided with automatic coupling device including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitate lifting and lowering into guide rails for easy maintenance. pump shall be provided with a stainless steel lifting chain conforming to bs 970 gr 304. pump speed shall be of 9600 rpm for high duty pumps and 960/1450 rpm for low duty pumpsets. casing and impeller should be of ci gr. fg 260 :is210 more preferably with hardened impeller.shaft shouldbe of stainless steel aisi 410. all the fasteners and bolts shall be of aisi 410.the submersible motor shall be operated with 3ph, 415 v(+or 10%), 50hz(+or-5 %) dry induction type. motor shall be capable of giving rated output without reduction in the expected life span when operated continuously. the rotating assembly shall be dynamically balancedas 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 bedesigned to withstand 120% of rated speed for two minutes without any mechanical damage, in either direction ofrotation. the motor vibration shall be within 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 instator winding temperature (15 deg celsius), bearing temperature, leakage in the stator housing and terminal box shallbe provided and to be suitably interlocked with the control panel for tripping the pump in case of increase intemperature beyond set limit.insulation class shall be of class h and degree of protection shall be of ip 68 as per is 4691. motor shall be suitablefor continuous operation in fully submerged or partially submerged condition.t