MID/AN/43

Strengthening, Improvement of various damaged components of Bowl Assembly of 20 cusec discharge x 40 meter Head, Jyoti make 2 stage VT Pump no. 02 installed at L.I.S Rajal by Rebuilding the A.I.S.I - 410 S.S. closed type impeller by way of rebuilding of all worn out portions including its bore hole and key ways by re-metalling in layers with requisite S.S. welding electrodes and then machining, grinding, polishing, finishing of impeller to true size and specifications so as to fit on leaded bronze wearing ring with suitable clearance/allowance. The job including balancing of impeller statically and dynamically. Complete Job.

Rebuilding of Cast iron bowl case by way of welding, rebuilding the damaged worn out portions of internal and external surfaces of the bowl case with specified C.I welding electrodes, repair, reconditioning of elongated holes of flanged ends, machining, turning, finishing the main bore hole of bowl after reinstallation to bring it to the true size. Providing & Fitting of new std. nitride compressed rubber bush lined leaded bronze discharge bush in main hole, locking of tight fitted bush with fine threaded copper studs S.S. lock plates and washers, finishing, grinding of external and internal surfaces of bowl case with grinders along with facing the flanged ends, rebuilding, turning, finishing to true size the seat of impeller wearing ring. Also extraction of broken stud by drilling and rethreading of the holes. Complete Job.

Fabrication and Fitting of new leaded bronze impeller wearing ring in rebuilt, reconditioned seat with having proper clearance allowance wearing ring. Complete Job.

Reconditioning of Cast iron Bell mouth by way of re-metalling the internal and external worn out surfaces, machining, turning and grinding to true size, facing, grinding of flanges to attain proper surfaces, reconditioning of elongated holes of flanged ends to std. size. Also rebuilding, turning and finishing to true size the seat of impellers wearing ring. Complete Job.

Reconditioning of Cast iron enlarger by way of rebuilding of worn out portions at external and internal housing by way of re-metalling with superior quality of welding electrodes and then finishing to true size after turning, machining, grinding, also rebuilding reconditioning of elongated holes of flanged ends to std. size. Also P/F of new std. size nitride compressed rubber bush in the main bore hole. Extraction of broken studs by drilling and rethreading of new oversize holes with P/F of new studs of specified material. Complete Job.

Providing anf Fitting of S.S. A.I.S.I- 410 impeller shaft 2.25 m long and 85 mm dia. As per existing sample of Bowl Assembly of 20 cusec discharge x 40 meter Head, Jyoti make 2 stage VT Pump. Job also includes providing and fitting of cotters. Complete Job.

Strengthening of M.S. strainer by P/F of new mesh rods at proper spacing, complete with welding of base mesh plate around the periphery. C/Job.

Fabrication and providing at site Cast iron stiffener made up from guide spider suitable for pump shaft of size 70 mm dia. with six no of 24 mm dia. holes . Extraction of broken studs, rethreading taping the oversize holes and fittings of new studs and new cover plate as per sample specifications. Complete Job.

Complete assembling of bowl assembly by way of mounting of 2 Nos. impellers on newly fabricated 85 mm dia. 2.25 m long impeller shaft with 2 Nos. bowl cases, 1 No. enlarger 1 No. bell mouth, 1 No. stiffener in sequence at their respective places with key holding rings, back washers, suitable with required allowances of 2 Nos. impellers and co-eccentric in 2 Nos. leaded bronze wearing and lifting of M.S. strainer to bowl assembly of relevant F.F. sheet at each joint of bowl assembly with replacement of worn out/damaged holding rings. Complete Job.

Shifting, transportation (to and fro) of the bowl assembly 2-stage Jyoti make V.T. pump no 02 along with some fast moving damaged components of column assembly from L.I.S. Rajal to workshop for repair, reconditioning and from workshop to L.I.S. Rajal after repair, reconditioning. Job includes loading, unloading, handling charges at both ends and hire charges of truck as well as cost of fuel and lubricants used by the vehicle. (Transportation charges may vary depending upon the location of workshop). Complete Job.