| 摘要 |
The throttle-part of the valve comprises a two-way seat valve with a follow- up throttle piston. A differential guide piston allows to position the follow-up throttl e piston via an edge control system. The differential guide piston is biased via a spring in a pressure-spring compartment in the direction of the closed position of the edge control system. A proportional directional control valve, which is actuated by a magnet, allows to pressuri se or depressurise the pressure-spring compartment via a pilot line A, whilst the position of the guide piston is determined by an inductive displacement transducer.
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