to the orientation or operation of pressure actuated seal assembly 100 pressure load u201c f u201d keeps seal 140 disposed against rotating member 110 alternatively when pressure selecting apparatus 165 is displaced plow is disposed in pressure load path 150 so as to create a pressure differential between the top section of seal carrier 130 exposed to pressure load path 150 and the underside of seal carrier 130 exposed to external flow path 155 see fig2 consequently the difference in pressures causes phi to force seal carrier 130 radially outward and open a fluid path gap defined between seal 140 and rotating member 110 in operation pressure selecting apparatus 165 causes the seal carrier 130 to move radially in seal carrier chamber 145 during operation or during transient events for example during startup and shutdown in one embodiment by way of example and not limitation pressure selecting apparatus 165 comprises a bellows 160 coupled to a valve 170 as shown in fig1 and 2 when the bellows 160 is not displaced or pressurized the valve 170 allows phi to enter pressure load path 150 and subsequently force seal carrier 130 radially inward and thereby causing a restriction of flow of the fluid path 105 between the seal 140 and the rotating member 110 see fig1 however when the bellows 160 is displaced or pressurized the valve 170 stops the flow of phi into pressure load path 150 and exposes pressure load path 150 to plow see fig2 as a result seal carrier 130 is forced radially outward due to the pressure difference between the top section of seal carrier.