The work presents analytical and numerical results and some designing aspects concerning the high gradient magnetic filtration (HGMF) of fine paramagnetic particles of a fluid suspension flowing through bound spaces. Our analysis concerns two HGMF systems, in axial and transversal configurations respectively, with the ferromagnetic wires placed outside the flow field. The conditions of maximum recovery of particles are established for these systems. The obtained results can be used to design magnetic filtering systems with anticorrosive and antierosive protection of the ferromagnetic wires.