neumann and esser make mug compressor spares neumann and esser make mug compressor spares , list of item ( s ) / work ( s ) as per tender documents , eccentric bushing, p / n:s1-082-000375 , 1ststg suctvlv inter. 4.034 p / n 20057135 , sealing, p / n, :s009462031 , 1st stg dis vlv inter 4.049 p / n 20057137 , piston rod packing internal, p / n:20054864 , 1st stg guide ring 4.011 p / n 20054868 , 1st stg piston ring 4.012 p / n 20054867 , o-ring id63x2, p / n:s009449160 , 2nd stg suct vlv inte 5.034 p / n 20057145 , 2nd stg dischar valve 5.048 p / n 20057076 , 2nd stg dis vlv inter 5.049 p / n 20057147 , 2ndstg pstnrod pkg int 5.060p / n 20054866 , 2nd stg guide ring 5.011 p / n 20054870 , 2nd stg piston ring 5.012 p / n 20054869 , intrnl intrmed pkg, p / n:s1-081-006391 , int oil wiper, pkg, p / n:s1-087-000648 , 1st stg dischar valve 4.048 p / n 20057073