servicing repairing of 02 numbers 15 hp air compressors anest iwata make installed at govt . smgs hospital jammu . , servicing/periodical maintenance of air compressors 2 nos . ( 15 hp ) of anest iwata make , installed at govt . smgs hospital , jammu by way of dismantling of compressor ends , supply piping , flanges and allied supports , joints of compressor units and extracting out of worn out/ damaged parts and providing and fitting ( for each compressor ) of check valve kit 1 no . , inlet filter element 1 no . , crank case filter element 1 no . , grease kit 1 no . , piston set 75 dia . 1 no . , piston 105 diameter 02 nos . piston ring set 105 dia 2 set , piston ring set 75 dia . 1 set . , pressure switch-01 no . , insulation sheet lp dia . 105 2 no . , insulation sheet lp dia 75 1 no . , valve plate set 105 dia . 2no . , valve plate set 75 dia . 1 no . the job also includes providing and fitting of automatic drain valve with fitting and valve to air tank . the job includes cost of material , skilled labour charges , transportation , machining/lathe works and all kinds of taxes ( gst ) thereof .