tender for charges for cleaning the water spray nozzles in emulsifier system of size 1/ 3/4 bspt around the generator transformers, unit auxiliary transformers, main oil tank, cot & dot of unit i to iv, station transformers i & ii. , checking of deluge valve and its trimmings and its accessories like spring, piston, piston o ring etc. and replacement of o ring, gaskets, corroded and worn-out fitting in emulsifyre system. , disconnection of cables, dismantling of limit switches, pressure switches & pressure gauges, cleaning and refixing after calibration pressure switches & pressure gauges only (6 nos. pressure switches, 4 nos. pressure gauges & 3 nos. limit switches ) in emulsifyre system. , charges for renewal of gaskets in all unions and flanges in the detection line (1 gi line) and worn out / corroded clamp fittings etc., in emulsifyre system. , checking the operation of deluge valve of size 100nb / 150nb in emulsifyre system. , charges for material cost (t&p) for sl.no.1 to 5