HFB fluids
Fire-resistant fluids based on "water in oil", i.e. an emulsion of around 40% water in mineral oil. Not used in Germany (although they are in the UK, for example).
Programmed control
involved. It can operate on a time-dependent basis (time-based control) or a process-dependent basis ( process-dependent control). Time-based controls include those (still used) programmed controls involving [...] involving mechanical sequencers, as well as controls based on punched cards. Until now, process-dependent controls have been referred to as "sequence controls". Another distinguishing characteristic is
Hydraulic inductance L h
Describes the pressure difference required for a change in flow rate (acceleration) and based on the mass inertia: where l = length and A = cross section of the column of oil
Filter
damaging its surfaces. Distinctions are made: Based on the operation pressure: suction filter and pressure filter (high-pressure and low-pressure filters); Based on the filtration efficiency: filter in main [...] main conduit , partial-flow filter and secondary-flow filter ; Based on the design: surface filter and volume (bulk) filter ; Based on the installation location: high-pressure filter , return line filter
Incremental value (of position or angle)
of distances or angles which determine the position of a point or of an angular position. They are based on the initial position at the time in question (DIN 66 257).
MH engine (bent-axis machine)
"Torque at the driving disc"; classification characteristic based on drive kinematics for axial piston bent-axis (axial piston) pump or motors where the piston rods take the torque-free cylinder drum with
Flow rate amplification
States the percentage-based relationship between the electrical input signal and the hydraulic (here flow rate ) at zero load pressure in the range of the primarily linear characteristic (cf. transfer
Fault detection code
Code in which the character string is formed based on defined specifications that makes it possible to detect deviations on these devices caused by malfunctions. The fault detection codes are redundant
Switching position
the case of a switching process and have a binary character, i.e. they are only "open" or "closed" based on their actuation (" black-white valves ").
Concentrates
to 5% of a hydraulic fluid. A distinction is made between three groups: Emulsions : Concentrates based on mineral oil containing everything developed for mineral oils in terms of additives . They may segregate [...] segregate out and sometimes decompose and are also susceptible to microbes. Solutions : Concentrates based on soluble polyglycols. They are stable and demonstrate relatively good wear behaviour; they are