flow 326 of the high pressure stage pump as shown in fig2 the third signal is directed toward the right hand of the valve member and in conjunction with the first branch 362 a of the second signal opposes the combined force provided by spring 356 and the first signal 360 thus in the starting mode of the system 300 the combined force imposed on the valve member 352 by the first branch 362 a of the second signal and the third signal 364 is less than the combined force of the spring 356 and the first signal 360 thus the valve member 352 adopts the position shown in fig2 where the journal bearings 370 are provided flow from the boost stage discharge in addition a first or low reference pressure of the relief valve 330 is established by the spring 332 and the second signal 362 particularly portion 362 d from the outlet of the boost stage pump 310 by way of example only low pressure may be at approximately 500 psi although this level at which the relief valve opens is not deemed to be limiting in fig3 the system 300 is shown in a second or normal operating mode the high pressure stage pump 320 is operating at a speed that provides an increased pressure in the outlet flow 326 the pressure provided by the third signal 364 increases on the right hand end of the valve member and in conjunction with the first portion 362 a of the second signal 362 overcomes the combined force provided.