valve plate 32 the cooperation between the projection 92 and the valve plate 32 ensures that a space or gap is defined between the surface 90 and the valve plate 32 for fluid to move between the crank case 12 and the suction cavity 14 the projection 92 can be sized such that the second fluid pathway 88 communicates less fluid between the crank case 12 and the suction cavity 14 than a 1 6 millimeter bleed valve that has been previously used in compressors the graph in fig6 illustrates volumetric flow of fluid from the crank case 12 to the suction cavity along the y axis and the difference in pressure between the discharge cavity 16 and the suction cavity 14 along the x axis the dashed line represents flow through a 1 6 millimeter bleed valve previously used in compressors a line portion 94 extends parallel to the x axis from the y axis to a point 96 the line 94 represents fluid flow between the crank case 12 and the suction cavity 14 through the second fluid pathway 88 while the piston 38 is in the closed position the fluid flow represented by line 94 is less than the flow through a conventional 1 6 millimeter bleed at point 96 the pressure in the discharge cavity 16 urges the piston 38 to the open position and volumetric flow between the crank case 12 and the suction cavity 14 increases to a second line portion 98 and the crank case 12 is quickly depressurized thus in operation the valve opens when a pressure differential between the discharge cavity and the suction cavity is at a first level and closes when the pressure differential between the.