Patent ID: 7144213

Claim:
A method for transferring a material from a high pressure environment to a lower pressure environment comprising the steps of: (a) arranging an input flow control device, thereby providing a flow of material from a high pressure conduit into a first region of a first chamber; (b) arranging an output flow control device, thereby providing a flow of material that is disposed within a first region of a second chamber from the first region of the second chamber into a low pressure conduit; (c) arranging a chamber control device between a second region of the first chamber and a second region of the second chamber, thereby providing fluid communication between the respective second regions of the first and second chambers, the first and second region of each chamber being separated by a flexible boundary; and (d) controlling a flow of non-compressible fluid from the second region of the first chamber to the second region of the second chamber, thereby controlling the flow of material from the first region of the second chamber into the low pressure conduit.