Electric hydraulic valve actuating device for e.g. chemical industry, has return spring supported between yoke and disc, and piston with control valve actuated by anchor, lever and tappet rod when current passes through coil

摘要

The device has a cylinder (1) filled with hydraulic fluid. An electromagnet is formed with an iron frame (8) and a coil (7), which are arranged coaxially around an external cylinder wall of the cylinder. A return spring (21) is supported between a yoke (20) and an annular disc, where the yoke is fastened to a piston rod (13). The annular disc is fastened at the cylinder or is fastened between the yoke and a shoulder. A piston (2) includes a control valve that is actuated by an anchor (5), a lever (14) und a tappet rod (10) when current passes through the coil.