method used the fit must be fluid tight and consequently rigid as a result of this rigidity any distortion or stress introduced to the valve housing 20 during assembly into the regulator will be transmitted directly to valve seat 28 this may produce minute distortions in valve seat 28 which can result in pressure creep of the regulator under static conditions fig3 is an enlarged view of valve seat assembly 100 which includes valve seat housing 20 having first housing end 40 second housing end 60 flange 21 o ring groove 41 housing bore 61 and central axial bore 65 valve seat 50 which has a slip fit in housing bore 61 is retained within the bore by retainer sleeve 52 which is pressed into housing bore 61 flexible seal 51 is positioned in seal groove 58 and is interposed between valve seat 50 and housing 20 at the internal annular ledge 55 produced in the housing by the differing diameters of housing bore 61 and central axial bore 65 having been designed with heavier walls and a heavier flange housing 20 of the present invention can tolerate higher stresses with less distortion than can the housing illustrated in fig1 thus the present invention provides a stronger housing in addition to providing a mechanically decoupled valve seat 50 floating.