corrigendum - supply complete screw compressor for nitrogen plant , list of item ( s ) / work ( s ) as per tender documents , refrigeration comrpessor without motor ; compressor manufacturer : howden model : xrv 127 / r1 service : freon ( r -22 ) nominal capacity : 75 tr discharge pressure : 23 bar g speed : 5000 max rpm cooling method : air cooled complete screw compressor , model xrv 127 r1 / 1 . 65 / 2 . 6 of nitrogen plant at fcc , without motor note : the compressor should be one to one replacement of the existing compressor which is installed at nitrogen plant in gujarat refinery , iocl . this is such that , during the time of replacement , the existing compressor can be decoupled , suction discharge flanges will be opened and removed from foundation and the new compressor will be installed with the existing coupling , foundation bolts and suction , discharge flanges along with other existing instrumentation connections etc .