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Contamination of the hydraulic fluid of a hydraulic system. It can be caused by solid particles and/or dissolved foreign matter, by mixing with foreign liquids, or by air entering the hydraulic fluid.

On a follow up control the value for the controlled variable follows the changing value of the reference variable during the feedback control (DIN 19 226). The main task of the controller here is to a

Processing of binary input signals that are not part of a binary coded digital information representation into binary .

Rotary joint for the flow of hydraulic fluid between a stationary and rotating part of the machine. Multiway rotary transfer joints : Rotary transfer joints for supplying one or more loads with pressu

The actuating force acts directly on the function element of the valve, i.e. on directional valves : The control spool is actuated directly by hand, by pressure or by a solenoid ; pressure valves : Th

As with electrics, a distinction is made in fluid technology between series and parallel resistances. For series circuits - as is the case for pipelines - the individual resistances are added ( series

In order to keep the operating temperature of oil-hydraulic systems as constant as possible, it is necessary to use an oil cooler to dissipate any heat losses that cannot escape through thermal radiat

The part of a hydraulic cylinder upon which the pressure of the medium acts and thereby generates a compressive force. F K = p 1 · A K — p 2 · A R Since friction occurs during the piston movement (par

Feature on hydraulic pumps of piston and vane design on which the delivery flow follows an arbitrary defined setpoint in accordance with a reference variable s by regulating out the disturbance variab

In the case of continuously adjustable directional valves and flow control valves: Dependence of the flow rate on the input signal given an constant valve pressure difference (DIN 24 311) ( Figure V 3