TTPS Operation Circle CAD CWPH I Inspection of internal assembly and reconditioning of Internal spares for cooling water pump 3C of Unit-III

Amount

Dismantling the seal water connection top bearing cooling water suction and return line etc. decoupling the pump from motor, dismantling the internal assembly constituent parts, cleaning and through inspection of parts, renewal of worn out parts, reassembling all the pipe lines, trial running and commissioning of the pump.

Charges for loading the rubber bearing holders in the lathe, removal of eccentricity or burrs forms in the inner bore of bearing holder by polishing the bore and checking the trueness of the flange faces and machining the bore if necessary, unloading the bearing holder from the lathe.

Charges towards renewal of Impeller shaft sleeves 2 Nos. by dismantling and removal of Impeller from Impeller shaft assembly by specially made jig on the Impeller. Loading the Impeller shaft along with jig in the hydraulic press. Simultaneously heating up of Impeller hub cooling Impeller shaft using dry ice, applying load by hydraulic press inch by inch, releasing the Impeller shaft continuously and separating the Impeller shaft and Impeller. Cutting and removing the worn out shaft sleeve 2 Nos. and fixing new shaft sleeve 2 Nos. on the Impeller shaft by suitably heating up the sleeves and polishing the Impeller bore and fixing the Impeller shaft, including cost of consumables like gas, dry ice, hire charges for hydraulic press and special jig etc., (Material will be supplied by the board at free of cost).

Charges for bend removal and unloading the shaft from the hydraulic press.

Charges for loading the shaft on the heavy duty lathe, length cutting, machining up to 10 mm OD, thread cutting and key way machining M24 drill & tapping holes providing work at the top side of the shaft finished size of the top shaft dia as per sample.

Material cost on contractor scope : Supply of Muff Coupling Allen Bolts 1.5 mm pitch Size M 16 x 40 mm for Cooling water pump 3C.

SRI VINAYAKA ENTERPRISES