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.

• 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.