bids are invited for custom bid for services - undertaking repair and calibration of various reducer onboard ins karanj, ( a ) removal and refitment of reducers ( b ) internal and external chemical cleaning ( c ) repairs / overhauling of reducer including machining, material build up and replacement of teflon / nylon seats. ( d ) pressure test with qc certification. ( e ) list of various types of reducers for overhaul / calibration is as follows:- overhaul of following reducers 250 / 90 bar reducer. inlet pressure -250 bar. outlet pressure-90 bar size - 6 inches 45-25 / 8 bar reducer. ( location - bridge ) inlet pressure -45-25 bar. outlet pressure - 8 bar size - 4 inches 45 / 30 bar reducer. inlet pressure -45 bar. outlet pressure-30 bar size - 4 inches 45 / 8 bar reducer in lp circuit. inlet pressure -45 bar. outlet pressure-8 bar size - 4 inches. calibration of following reducers snorkel air mast supply reducer. inlet pressure-250. outlet-90 bar. size-6 inches ap lowering circuit reducer and safety valve. inlet pressure -250. outlet pressure-15 bar. size 6 inches nitrogen pressure reducing valve inlet pressure-57 bar. out pressure - 12 bar. size -4 inches total quantity :