which tends to make the flow rate through the device constant the same compensation effect would occur for changes in outlet pressures it will be apparent that deflection of the damper plate 22 to equalize the pressure differential will provide flow regulation as a function of a change in pressure at the flow gap 26 as the outlet pressure changes referring now to fig3 a second preferred embodiment of this invention is depicted as is apparent from the preferred embodiment of fig1 a restrictive gap must be maintained across at least one face of the damper beam however an increase in the total device restriction can occur by having a restrictive gap on both the top and bottom of the beam the device however will become less sensitive that is there would be a decrease change in flow restriction compared to a device having a single gap for the same given change in pressure to increase sensitivity the single restrictor configuration of fig1 and 2 can be stacked in a series arrangement to increase the net restriction such is illustrated in fig3 as illustrated this preferred embodiment comprises a pair of stacked flow regulator elements 30 and 32 an inlet to the system 34 defines a flow inlet into cavity 36 a restriction gap 38 is defined therein between the damper beam structure 40 and a first outlet 42 the damper beam 40 is cantilevered in a manner similar to that illustrated in fig1 and 2 the stacked restrictor then comprises a second unit 30 having its inlet 44 in alignment with the outlet 42 fluid flow as illustrated by the arrows in 43 is thus.