Concentrates
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
Functional control
Links the function commands provided by the programmed control with the feedback from the sensors in accordance with the logical instructions for control signals. This means, e.g., the linking of inde
Flow rate range of flow requirement
A distinction is made between: pressure-controlled : Area between minimum and maximum flow rate as a function of the pressure difference (inlet pressure minus outlet pressure): Q = f (p) under stated
Motor slip
Difference between the ideal and actual rotation speed of a hydraulic motor under given conditions. Motor slip is caused by the internal leakage of the motor, which depends on the pressure .
Velocity of sound pressure waves
Velocity of the transmission of pressure in a fluid (speed of sound). It is dependent on the bulk modulus K of the medium and its density ρ: In air in the normal state it is 333 m/s. In mineral oil it
Stabilised hydraulic oils
Modified HLPD oils that only take on (hold) a water content of 1 to 2%, but separate larger water quantities –– like any normal mineral oil . The stabilised hydraulic oils therefore only slightly redu
Piston area
The hydraulically effective piston area Ap on the extension side of hydraulic cylinders is calculated from the piston diameter dp and the number of cylinders ic. Calculate the piston area directly and
Flushing pressure
Pressure at the point at which the flushing current leaves the flushed circuit ( feed circuit ) (DIN 24 312).
Hybrid accumulator
Hydraulic accumulator manufactured from a combination of steel and plastic to save weight. Suitable for use in vehicles, particularly with a view to energy recovery through braking.
Pressure positioning range
Range in which the "pressure" output signal at a given inlet pressure is controlled by a continuously adjustable valve (E DIN 24 311).