Repairs/maintenance of 250 mm dia Non-Return Valves fitted with the delivery pipes of pumping unit no. 1, 3 and 4 and repair/maintenance/servicing to 2 Nos Vacuum pumps motor set (7.5 hp) along with allied works at Raya Lift irrigation Station

Amount

Dismantling the 250 mm dia NRV installed on delivery lines no. 1, 3&4at LIS Raya and removing the top cover, shaft, bushes, hinge pin, bye pass valve pipe, nuts and bolts. Providing and fitting of new body seat ring and door face ring of stainless steel / bronze. Welding worn-out spot of C.I after cleaning, grinding and finishing the door in such a way that door ring fit smoothly. Repairs to damaged shaft by way of rebuilding the shaft by welding, turning and finishing. Assembling the valve after repairing and P/F of new high-quality gasket set, gland packing, adhesive to prevent leakages and high tensile steel nuts and bolts.Repairs to bye-pass system of NRV 1,3 & 4 by P/F of new gate valve 50mm dia. Job includes replacement of damaged nuts and bolts with new one after cleaning it with emery paper and P/F of new high-quality gasket and sealant adhesive like holdtite to prevent leakage. Complete painting of NRV after making surface smooth by removing dust & rust using wire brush & emery paper and then giving anticorrosive treatment by applying two coats of super enamel paint (black color). Complete job includes cost of material and labour charges.

Repair/maintenance/servicing to 2 No’s Vacuum pumps – motor set (7.5 hp) by way of dismantling of vacuum pump and motor set (7.5 hp) catering to unit no. 1, 2 and 3 and subsequently shifting to workshop for repair work by way of extracting the rotor from the stator followed by cleaning of casing, rotor etc. with cleaning chemical to remove dust, dirt and carbon etc. Complete 3-phase re-winding of 36 slot stator with same pattern and turns of wiring as per sample. Varnishing of rotor/stator windings with 2 coats of superior quality varnish. Providing/ fitting of 2 no. new ball bearings as per sample to DE and NDE in lieu of old damaged/worn out one. Shifting of the repaired motor to the site and its fitment with the vacuum pump. Replacement of wornout coupling along with rubber bush in 2 no’s units by way of replacing defective /wornout components .in place of old/damaged one. Complete job includes the cost of all the material, transportation, installation, labour and other miscellaneous charges at LIS Raya

M/S V.N ENGG WORKS

AJAY ELECTRIC AND MECH WORKS