A method for converting a pump for use in a flow stream containing a mixture of highly compressed gas, compressible liquid or supercritical fluid wherein the pump delivers a compressible fluid against a back-pressure regulator which in turn delivers a controllable flow rate downstream of the regulator...http://www.google.es/patents/US6561767?utm_source=gb-gplus-sharePatente US6561767 - Converting a pump for use in supercritical fluid chromatography
Converting a pump for use in supercritical fluid chromatography
