procurement of most critical spares for batliboi make ac compressors model-6c552b for esp panel room at ph-i units 1 and 2 sgtps mppgcl birsinghpur procurement of most critical spares for batliboi make ac compressors model-6c552b for esp panel room at ph-i units 1 and 2 sgtps mppgcl birsinghpur , piston , piston pin , retaining ring/ piston pin (circlip) , piston ring , oil ring , connecting rod assembly , stopper connecting rod(lock plate) , reamer bolt connecting rod , half section bearing , crank shaft , ring crank shaft , key crank shaft , nut crank shaft , main bearing pump side , main bearing seal side , shaft seal assembly (model no 1250) , oil pump assembly , unloader assembly , unloader piston , retainer unloader piston , unloader piston packing , spring unloader piston , lift pin , spring lift pin , grooved pin unloader , e-ring lift pin , oil filter , suction filter felt , pilot solenoid valve , oil pressure regulating valve , suction valve plate , discharge valve plate , valve seat , spring suction/discharge valve , discharge valve glands (rubber) , ‘o’ring set , gasket set , cylinder liner , safety valve , filter solenoid valve , pump spring , pump steel ball , pump end bearing head , oil check valve , companion flange , angle valve , demister assembly (equalizer) , mp 1 only for hp cut-off series , mp55 oil safety switch , suction filter , liquid line strainer , core filter