Hoerbiger Ventilwerke Aktiengesellschaft

Hygrama Ag

Johannes Wirtl

Herbert Frisch

Roland Zengerle

Microvalve

For a piezo valve (1) the sealable surface of the seat (13) of the controllable medium connection is so large that the pressure-induced closing force of the sealing region (14) of the bending element (4) that is generated in accordance with the medium pressure acting in the second switch position is greater than the elastically induced counterforce and smaller than the total of this counterforce and the piezo reset force acting upon application of a corresponding control voltage. Thus, both switch positions of the valve can also be held for a long period of time following pulsed voltage operation without any additional voltage application.

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Schongau, Germany

Johannes Wirtl