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A Modular Heat-Shrink-Packaged Check Valve With High Pressure Shutoff

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2 Author(s)
Lo, R. ; Depts. of Biomed. & Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA ; Meng, E.

A novel check valve featuring adhesiveless packaging in heat-shrink tubing and dual regulation of in-plane flow is presented. The modular design enables simple replacement of valve components to modify valve behavior and performance. The specific design is intended for low-profile fluidic applications requiring flow control, such as drug delivery devices. The heat-shrink packaging scheme is extremely robust and can withstand >; 2000 mmHg (266.6 kPa) without leakage. Three different valve geometries were investigated and evaluated with theoretical and finite-element modeling analyses. Repeated flow regulation experiments on a fully packaged, hydrated valve demonstrated flow regulation between 25 and 2000 mmHg (3.33-266.6 kPa) and leak-free closure up to 500 mmHg (66.7 kPa) of reverse pressure with no observed stiction. The valve closing time constants were also determined.

Published in:

Microelectromechanical Systems, Journal of  (Volume:20 ,  Issue: 5 )

Date of Publication:

Oct. 2011

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