A leading manufacturer of valves, pumps and manifolds― Takasago Electric, Inc.

The Soft-Seal is a useful option for systems which handle easy-crystallising or particle-contaminatable fluids. Small elastic parts, which are as chemically inert as Teflon^TM, protect sealing surfaces from particles in the fluids, reducing leakage problems which were common with Teflon^TM valves. 

Perfluor, the elastomer used for the Soft-Seal, has a stable molecular structure consisting of only fluorine, carbon and oxigen atoms. Outstanding resistance to almost all chemicals. --->Chemical Compatibility Table

·             Effectiveness against foreign matter

Glass beads sprinkled (dia. 40 micrometers) on the valve seat

After

Soft-Seal Diaphragm No significant scratched are observed.

All-Teflon Diaphragm Many small holes can be observed after opration.

List of diaphragm isolated valves can be viewed here!

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