Title: Pulse damper for high-pressure liquid chromatography

• Summary
• Claims
• Description
• View all

Abstract: A pulse damper for use in high-pressure liquid pumping applications, such as liquid chromatography, comprises a stainless steel cylindrical housing structure having threaded end caps to which inlet and outlet fittings are attached for coupling to a high-pressure liquid flow line. A spool made of a plastic material such as polytetrafluoroethylene or a perfluoroelastomer is fitted tightly within the housing structure, so that flow line liquid passes through the damper via the axial bore of the spool. The outer portion of the spool is configured to provide a cavity between the spool and the surrounding housing structure, and a compressible liquid fills this cavity. In operation, when a pressure pulse occurs in the flow line liquid, the relatively thin cylindrical wall of the spool expands radially outward in response, thereby causing a compression of the liquid in the surrounding cavity. Thus, the liquid in the cavity surrounding the spool serves as an energy-storing means for damping pulsations in the flow line.


Do you think this is a good invention? Vote now: