THERMAL VOLUME-NEUTRAL STROKE TRANSMITTER, ESPECIALLY FOR A DOSING VALVE WITHOUT HYDRAULIC COMPENSATOR

摘要

The invention relates to a thermal volume-neutral stroke transmitter (11) for using especially with a metering valve (13), without the need for a hydraulic compensator. The invention is characterised in that, in addition to the liquid (32) in the volume (4) of the stroke transmitter, respectively a first and/or second displacement body (34, 36) is/are positioned in a stroke transmitter (11), for displacing said liquid (32). Such a closed system of three materials can still be designed in such a way that it remains pressure-free during temperature changes.