NIT8Item5

Repairing of Upadhaya Make Delivery Non return Valve of size 350mm dia. of Pump set no- 2 & 4 at filter House of Bawana WTP by carrying out the following works:- Cutting of nut bolts of delivery line reducer, Gap piece & Non return valve of both end Flange with the help of gas cutter & taking out the specials from the delivery line one by one like reducer, gap piece from the line & finally NRV from the delivery line & Putting them on safer Place in the pump house. Fixing of blank flange on both side of delivery line.

Lifting of complete Non return valve with the help of H.O.T crane, heavy manual labour arrangement & loading in the tempo for taking it to workshop for servicing & renovation purpose including unloading in the workshop & cartage for the same.

Cutting and opening of all nut bolts of N.R.V body cover plate. Lifting of body cover with the help of Tri pod chain block arrangement & manual labour arrangement to take it to safer place. Taking out complete Disc with disc arm & Shaft from the N.R.V body by lifting with the help of Tri pod chain block arrangement & manual labour arrangement. Cleaning of body seat ring of N.R.V from inside by chemical solution and polishing by manual arrangement. Cleaning of disc retaining seat ring by chemical solution, emery paper etc. and polishing as required.

Making of damaged collar seat in the NRV body of one side block for resting of disc holding shaft block. The job includes grinding, machining and special C.I welding as required to make a proper size.

Renovation of disc holding blocks by fixing of new bushes in the bore as per the size of NRV shaft. The job includes removing of worn out seat & making of proper size & fixing of new bushes.

Supply of cover bolts & seat. (IS : 1367 Class 4.6/4.0)

Supply of Gas kit. (Rubber IS : 638 Type-B)

Supply of disc holding shaft. (SS-410)

Fixing of complete disc with disc holding shaft in N.R.V body by proper matching of both the seat rings of body & disc , Fixing of body cover with the help of Tri pod chain block arrangement & manual labour arrangement etc after replacing of rubber gasket & damaged cover bolts & tightening of bolts with spanner etc. as required by job.

Loading of complete N.R.V in the tempo from the workshop to the site (Bawana WTP) & unloading the same from the tempo with the help of H.O.T crane & manual labour arrangement including cartage charges.

Taking out blank flange from both ends & fixing of N.R.V & other specials of delivery line like reducer with the help of lifting arrangement etc after replacing of rubber gasket & damaged nut bolts & tightening of nut bolts with spanner etc. as required by job.

S.I.T.C of new 350mm dia. X 300 mm long Dismantling joint in the delivery line with new nut bolts etc.(Make:-UPADHAYA)

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