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Reversal of a pulse valve by purging (depressurising) the piloting line. Not used very often now, because switching may also occur in the event of an unintentional pressure drop.

Filter arrangement, within a circuit separated from the main flow, incorporating a separate pump and in most cases a twin filter . This separation from the main circuit makes it possible to be very pr

Acrylonitrile butadiene rubber. The acrylonitrile component can be anything between 18 and 50%. Numerous seals for hydraulic and pneumatic devices are made from this synthetic rubber, including radial

The base oil is of the naptha variety. Naphta based oil has a high aromatic content and is associated with low viscosity (VG 15 to 10). Because of their low pour point , these oils are predominantly u

Changeable deviations around the zero point for a measuring instrument or a machine as a result of external influences (e.g. temperature). It can be rectified by means of a null-adjustment signal.

Measurements at a sensor or valve whereby the measured variable zero and the output signal zero do not match up as a result of manufacturing tolerances. The type of measurement is dependent on the dev

Fixture which changes the flow rate of a variable pump in such a way that is becomes ever smaller as the pressure increases (e.g. up to around 5% of Q max). The pressure at which adjustment starts is

Flow rate which continues to flow for proportional valves, high response proportional valves and servo valves when the consumer ports are closed and at a system pressure p o. It results from the leaka

With proportional spool valves, the overlap/underlap at the individual control edges of the valve (overlap/underlap conditions) determine the flow rate signal characteristic curve ( Figure N 6 ) and t

Input signal (correction signal) for bringing a valve to hydraulic zero (DIN 24 311).