be more responsive to the flow regime only and not be impeded by the mass of the choke members in some embodiments like that shown the resilient member is a bellows that is filled with an appropriate fluid for the temperature and other conditions in which the device is to be employed in other embodiments other types of springs may be substituted such as metal rubber plastic etc and in all forms such as coil leaf wave solid etc type springs a method for controlling flow through a flow control device is also contemplated the method relies upon the bernoulli principle and uses a reduction in pressure in a flowing fluid that has exceeded a selected threshold velocity to move the choke member s disclosed above in a way that reduces a flow area through the device 10 the movement occurs automatically so that no intervention is needed and so that infinite adjustments occur as fluid flow rates vary over time the use of the terms u201c a u201d and u201c an u201d and u201c the u201d and similar referents in the context of describing the invention especially in the context of the following claims are to be construed to cover both the singular and the plural unless otherwise indicated herein or clearly contradicted by context further it should further be noted that the terms u201c first u201d u201c second u201d and the like herein do not denote.