procurement of spares for atlas copco make conveying air compressor installed in ahp 1x500 unit no. 5, sgtps, birsinghpur procurement of spares for atlas copco make conveying air compressor installed in ahp 1x500 unit no. 5, sgtps, birsinghpur , as per tender schedule , coupling bush ( 6 piece in one set ) , element exchange kit , oil cooler service kit , gear casing seal kit , drive shaft bearing kit , drive shaft seal ring kit , oil pump kit , maintenance kit ( 8000 hours ) , check valve kit , unloader o- ring , compensator , check valve gasket , roto-z oil ( 2 drum 418 lt ) , hump hose , hose clip