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Gap between two chambers with different pressures. To prevent leakage either the gap must be designed such that no pressure flow can be produced ( gap seal ) or special elements are used, the seals. I

That part of a lip seal that generates the preload during installation (Figure D 13) . On compact seals the sealing lip is often shortened to form a sealing edge.

Combined piston

, pipe fittings

The closed end of a cylinder . It can house the rear end position damping and/ or the mounting of the cylinder.

Is used to characterise the dynamic behaviour of devices in hydraulics, above all of proportional valves and servo valves. In the Bode diagram the amplitude response and phase-frequency response are s

"Blowing past" a piston seal. With large pressure gradients it can occur that the seal is not pressed against the sealing surface, instead it is pressed into the grove (Figure B 21) .

Valve assembly method in which individual function blocks of a machine control are connected together to form vertical stacking assemblies above each other or to form series connections (beside each o

Arrangement of several directional valves including pressure and control valves in a single block (monoblock valve) or individual valves screwed together (sandwich valve). Valve blocks are used as a m

The term block diagram should no longer be used, instead signal flow diagram should be used DIN 44 300 part 4.