fd fan fluid coupling spares , list of item ( s ) / work ( s ) as per tender documents , complete fluid coupling , ub fd fans , voith ; flexible couplings ; completed variable speed turbo coupling for ub fd fans make:voith turbo , model:750 svtl 21-6 . 3 sl . no . :pc1204-111-2375 ; , cplg fluid ind l254 tip6059110010 , voith ; flexible couplings ; fluid indicator variable speed turbo coupling ub fd fan make:voith turbo , model:750 svtl 21-6 . 3 sl . no . :pc1204-111-2375 ; , cplg shell cover p/n:101/011 , voith ; flexible couplings ; shell cover variable speed turbo coupling ub fd fans make:voith turbo , model:750 svtl 21-6 . 3 sl . no . :pc1204-111-2375 ; , voith fltr element tip . 6914400060 , ub fd ; flexible couplings ; filter element variable speed turbo coupling ub fd fans make:voith turbo , model:750 svtl 21-6 . 3 sl . no . :pc1204-111-2375 ;