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Elements to be mixed in with pressurised water ( HWBF ) to give the water lubricity and corrosion protection. They usually make up 2 to 5% of a hydraulic fluid. A distinction is made between three gro

Controls which link signals with each other using logic by means of contactors and relays — fitted with contacts. These days, contact controls only tend to be used for small-scale controls, i.e. those

Standard pressure gauge with a spring-based elastic measuring element which features a spring contact in addition to the pointer with its electrical limit value indicators to ensure there is an upper

System in which the flow rate remains constant regardless of how high the load pressure is, assuming any pressure-controlled leakage losses are ignored. Constant flow systems in an open circuit are th

Hydraulic pump with constant geometric displacement V 1 for each revolution and therefore a constant delivery flow Q 1 at constant drive speed n 1: Q 1 = V 1 · n 1.

Hydraulic motor with constant displacement . Its variable rotation speed is determined solely by the (variable) pump or an upstream flow valve.

System in which the pressure at the hydraulic pump remains constant regardless of the flow rate and how high the load pressure is. Strictly speaking, this is only really the case with: controls with t

Throttle with a constant cross section. Opposite: variable throttle .

Creation of feedback control and general control systems from ready-made program modules.

Volume which must also be compressed into a space due to the compressibility of a fluid in order to generate a specific pressure there: where V o = volume under pressure, Δ p = pressure increase in th