bids are invited for biennial annual maintenance contract for nitrogen analysis system at r&d of trombay unit.; i. nitrogen analysis system jobs to be carried out under preventive maintenance visit; 1. digestion (kes08le)/ 2014 1 digestion tube 250ml 2 tube support rack 3 manifold rack 4 manifold support rack 5 casted aluminum heater page 4 of 49 6 temperature controller dc 1040 7 thermocouple 1. scrubber (kelvac)/ 2014 1 scrubber motor 2 bottle adapter rubber 3 epdm hose 4 2 lit reagent accumulator 5 bottle adapter glass 1. distillation (classic dx va)/2014 1 expansion vessel 2 condenser 3 macro adapter 4 switch-mode power supply 5 mother board 6 control board 7 reagent tank 8 12 v valve 9 heater 10 thermostat 11 refilling pump 12 dosing pump 13 silicon hose 14 proximity sensor 1. chiller (kelfreez)/ 2014 1 chiller pump 2 temperature controller dc1010 3 compressor 4 chiller gas