Objet de la recherche «*».

The expression characterises the interaction of a throttle function ( throttle valve , continuous directional valve) with a (control throttle) that provides a load pressure independent flow rate with

Ratio of the areas of valves subjected to the control pressure (hydraulic or pneumatic) Valve . The control surface ratio plays a particularly vital role in the case of 2-way plug-in valves ( Figure S

Estimated time or time determined on similar systems that a filter element can be used before it must be replaced. The operating life is dependent on the filter selected, the amount of contamination t

Covers especially the characteristics of discrete time systems and therefore goes beyond analogue, linear control theory . Digital control theory has become very important due to the possibilities off

If contact seals must seal against moving surfaces, friction is produced that causes wear. The friction force necessary to overcome this friction reduces at the same time the movement force (e.g. pist

Of the most important forms of energy that can be used for drives (mechanical, hydraulic and pneumatic) only mechanical energy does not require conversion (Figure E 29) . For all forms of energy the d

Memory programmable control with read-only memory as program memory with content that, after successful programming, can only be changed by mechanical action in the controller (DIN 19 237). The contro

Device on valves to control the position of the switching element and therefore the functionality of the valves. The position monitoring is commonly performed using proximity sensors or displacement t

The speed of hydraulic cylinders is calculated from the flow rate Q, the effective area of the cylinder A (extend speed - piston area , retract speed - annulus area ) and the number of cylinders ic. C

In a digital control with signal hold, the value achieved for the output variable is retained following removal or withdrawal of the reference variable — particularly following termination of the trig