tender for supply of twin oil cooler for support bearing & main reducer lube oil system of ball tube mills bbd4772 of unit# 1 to 4 ctpp, chhabra , twin oil coolers for support bearing lube oil system unit #1 to 4 twin oil cooler with specification: shell side oil flow 135 lpm, inlet/outlet temp 55/45 °c and tube side water flow 200 lpm, inlet/outlet temperature 36/38.9 °c. brass(low fin), 5/8x 18 bwg, surface area 23 sq.m. oil -servo system-460. for support bearing lube oil system.(each set consist to two cooler) , twin oil cooler for main reducer lube oil system unit #1&2 main reducer lube oil system oil- servo mesh-460 capacity:- 150lpm, model:- sec-150, heat load:- 46650kcal, working pressure tube side:-3 kg/cm², shell side 5 kg/cm², test pressure tube side:- 7.5 kg/cm², end connection tube side :-2nb, shell side:-2 ½ nb (each set consist to two cooler) , twin oil cooler for main reducer lube oil system unit #3&4 main reducer lube oil system oil- servo mesh-460 capacity:- 150lpm, type -- horizontal, size - 50 nb, design pressure (shell side) -5 kg / cm² hyd. test pr. (shell side) - 7.5 kg. / cm², design pressure (tube side) -5 kg / cm², hyd. test pr. (tube side) - 7.5 kg. / cm², heat exchanged 56000 k. cal / hr, cooling surface area 6.5 mt², water connection 2 bsp, oil connection - 50 nb flanged make.(each set consist to two cooler)