in the inner diameter of the bushing between the bushing 110 and the shaft varies in this case study the clearance is about 8 to 10 thousandths of an inch between the shaft and the bushing 110 near the high pressure side the pressure on the inner diameter of the bushing is about 3200 psi the pressure acting on the inner diameter of the bushing 110 decrease regularly from the pressure of 3210 psi at the high pressure side to the pressure of 1600 psi at the low pressure side the non metallic material used for the bushing 110 may be deformable and will deform when placed under conditions of high pressure differential the non metallic material may also be subjected to high temperatures such as the temperatures in a centrifugal pump used to move hot water in a heating system which high temperatures may decrease the pressure differential needed to deform the non metallic bushing material in failure analysis of the case study it was found that the pressure differential between the outer diameter and the inner diameter of the bushing 110 would cause deformation of less than 1 thousandths of an inch at the high pressure side where the pressure differential between the outer diameter and the inner diameter was very small the deformation at the low pressure side however would be around 27 thousandths of an inch which was determined to be the cause of the system failure since.