Valve for controlling liquids has a piezo actuator in an actuator bore, a hydraulic pressure intensifier with first and second pistons and a pressure area between these pistons and metal bellows.

摘要

A valve has a piezo actuator (2) in an actuator bore (3), a hydraulic pressure intensifier (11) with first (12) and second (13) pistons (13) and a pressure area (14) between these pistons and metal bellows (5) that are adapted to take up the axial lift stroke of the piezo actuator. The bellows are irremovably joined to the piezo actuator and to the actuator bore to ensure that the actuator module is sealed tight against the valve's other zones to prevent liquid seepage.