A new device, MAGCLA (TM), which is capable to separate and classify particles according to their magnetic susceptibility, is being developed by the authors. In a previous article the equations of movement for magnetic particles in this new device were analyzed and in this paper the limiting conditions for the different variables and equations of movement are presented for the magnetic particles case. The knowledge of these limiting conditions is important as they set the boundaries within which we may manipulate the MAGCLA (TM)'s operating and design variables. (c) 2006 Elsevier B.V. All rights reserved.