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RASIRC Granted Patent for Specialty Seal in Ultrapure Environment

Thursday, February 25, 2010

Patent #7,625,015B2 covers unique process for assembly of dissimilar materials

San Diego, CA -- RASIRC®, the steam purification company, announced today that the US Patent and Trademark Office has granted Patent #7,625,015 B2 for a novel adhesive and weld-free assembly technique for working with hollow fibers and ultrapure materials. The patented process allows for the simultaneous sealing of multiple tubes within a single outer shell when an external radial compressive force is applied. The seal is used in both RainMaker® Humidification Systems (RHS) and RASIRC Steamers.

"It is quite difficult to assemble hollow fibers without glues or thermal bonds. Our unique method to assemble dissimilar materials allows us to create an ultrapure seal that works in high temperature and steam environments," said RASIRC founder and president Jeffrey Spiegelman. "The granting of this patent is a recognition of the uniqueness of our invention."

The seal enables multiple thin wall lumens to be assembled into RainMaker humidifiers or SPA, Steam Purifier Assemblies. The RainMaker humidifiers control the transfer and purification of water vapor directly into a carrier gas stream including inert, corrosive, and flammable gases at a wide range of flow rates for use in solar, microelectronics, and other critical process applications. Unlike nebulizers, bubblers, and other spray type vaporizers, the RHS prevents water droplets from entering the process, enabling better uniformity and lowering contamination.

The ultrapure seal enables the RASIRC Steamer to deliver steam at part-per-trillion level purity. The creation and validation of this seal enables the use of high-purity ionic hollow fiber membranes for steam purification. Because of high temperatures and pressures, common purification materials break down, so prior to this invention, steam purification through membrane separation was not possible. After almost 400 years of industrial steam usage, through this patent and others presently in process, RASIRC has created a true innovation in the ability to purify steam.


RASIRC products purify and deliver ultra-pure liquids and gases. RASIRC technology is the first to generate ultra-high-purity steam from de-ionized water, reducing cost, increasing yield, and improving safety. RASIRC dryers, humidifiers, and steam generators are of critical importance for applications in the semiconductor, pharmaceutical, medical, biological, fuel-cell, and power industries. Custom systems are available upon request. Call 858-259-1220, e-mail, or visit

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