Rathi N-flex couplings consists of graded cast iron hubs and a set of ‘H’ shaped highly resilient blocks which accommodates parallel, angular and axial misalignments & absorbs torsional vibrations. Rathi N-flex spacer couplings (Type – RNS) are suitable for “Back Pullout Pumps” in which the impeller can be disassembled without disturbing motor and pump from the base frame