Permanent Magnetic Couplings available from jbj Techniques Limited

Magnetic Couplngs Data Required for Specification Technical data required to specify correct coupling size There is minor power loss using the GMDO magnetic coupling. There are three reason for this; eddy currents, magnetic hysteresis and hydrodynamic resistance. The eddy current and the magnetic hysteresis is only a minimal part of this power absorption. The third consideration, the resistence, depends on the medium used within the pump, and from the moment when the internal rotor is immersed in the medium. Therefore it is important to establish the viscosity of the medium and the operational speed to determine the main power of the magnetic coupling. Electric Motor Input rating (continuous rating S1) . . . . . [Kw] Number of poles . . . . . Nominal operational speed . . . . . [min-1] Maximum torque (continuous rating S1) . . . . . [Nm] Start ( soft or direct ) . . . . . Pump type Max. displacement . . . . . [cm3/rev] Max. pressure inlet port pump . . . . . [bar] Max. pressure outlet port pump . . . . . [bar] Max. displacement at max. pressure ( only for variable displacement pumps ) . . . . . [cm3/rev] Max. pressure at min. variable stroke ( only for variable displacement pumps ) . . . . . [bar] Pump medium Max. temperature . . . . . [°C] Min. temperature . . . . . [°C] Max. viscosity . . . . . [cSt] Min. viscosity pump medium . . . . . [cSt] Driver Side Dimensional characteristics of the driving side . . . . . Power in S1 conditions . . . . . kW Number of poles . . . . . speed . . . . . rpm Maximum torque . . . . . with or without soft start inverter Driven Side Dimensional characteristic of the driven side . . . . . Maximum pressure into the containment shroud . . . . . bar Mounting position . . . . . horizontal or vertical Fluid/Gas Fluid or gas type . . . . . Minimum temperature . . . . . °C Maximum temperature . . . . . °C Minimum viscosity . . . . . cSt Maximum viscosity . . . . . cSt Ambient Minimum temperature . . . . . °C Maximum temperature . . . . . °C 8