A pressure balance model is proposed to determine the flow dynamics around a circulating fluidized bed (CFB) loop. The model contains the effect of exit configuration on the axial pressure profile in a riser with an abrupt exit. In the model, the decay and the reflux constants have been correlated with the pertinent dimensionless numbers and geometry of the exit in the riser. The practical operating conditions in the solid recycle system with a loop-seal are considered for CFB combustor applications. The predicted pressure profile along the height from the proposed model exhibits a good agreement with the experimental data.