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whose task is to adjust the position (distance or angle of rotation) of an element (e.g. valve control spool, slide) to match a setpoint as closely as possible. The negative feedback for the controlle

Non-contact seal from the group of labyrinth gap seals on which fluid flowing outward is pumped back by a counter-rotating thread on the shaft. Here a pointed, triangular thread has proven effective (

The negative excess pressure created in the intake stroke of the displacement units sucks up the oil automatically. This suction capacity is highly dependent on the construction design of the pump, it

This is understood as the part of the overall control system of a plant, which is to control the compressed air or hydraulic fluid. in terms of direction, strength and pressure potential from the pump

Bernoulli force

The column of fluid in pipes is elastic and affected by both weight and friction. These characteristics are described in terms of the pipe capacity , the pipe inductance and the flow resistance (effec

Normal cooling principle on water-cooled oil coolers. It states that the medium to be cooled flows in the cooling pipes in the cooler in the opposite direction to the cooling water.

Function unit for controlling a single (DIN 19 237). The single control for an actuator is the smallest (and lowest) function unit within the control for a process. It controls a single control elemen

Damage to the hydraulic fluid primarily due to oxidisation (formation of acid residues) and polymerisation (enlargement of the hydrocarbon chains); creates sludge or resin-like coatings on device part

Of a cylinder : Qualitative illustration of the movement process of a cylinder , starting with the acceleration phase and the different working movements over the holding phase to the reflux ( Figure