Control flow rate
In general : Flow rate to supply the hydraulic actuation of devices. With continuously adjustable valves : A distinction is made between the resting value of the control flow rate as its value in a stationary
Sensor technology
therefore comprises the entire complex from the sensing element ( sensor ) to the measuring equipment with digital processing electronics, including the processor and software ( sensor system ).
Position diagram
reflux of a feed cylinder). It consists of functional lines for individual movements in connection with drive and signal elements (Figure W 5). The position diagram is not bound to certain forms or measures
Force multiplication ratio
pressure is acting. It is possible therefore to generate a very powerful force (e.g. at press pistons) with pressure generated by just a small area (e.g. pump pistons):
Performance map
Graphically represented mutual dependency between two operating variables, with one or more variable parameters being used as parameters. This kind of performance map can provide a complete overview of
Internal leakage
Leakage occurring inside a device. It is not visible from the outside, but can involve a loss of power. With pumps, for example, this may be a flow of leaking oil from the high-pressure side towards the suction
Rigid vane machine
principle , in which two vanes are adjustably arranged in the housing at an angle of 180°, which, together with two cams on the rotor, create two suction chambers and two pressure chambers ( Figure S 72 ). The
Hydraulic axis
Complete working system for positioning tasks, consisting of a hydraulic cylinder with integrated control (high response proportional) valves and an integrated position measurement system (Figure H 13)
High Water Based Fluids (HWBF)
Fire-resistant fluids based on water with 2 to 5% concentrate intended to give the water a minimum level of protection against corrosion and wear. Depending on the composition of the concentrate, emulsions [...] emulsions of every kind (HFAE) are produced, including micro-emulsion with mineral or synthetic oil, or a solution (HFAS). Concentrates for solutions are completely oil-free and more environmentally friendly
Accumulator regulations
defined in the Druckbehälterverordnung (German regulations on pressure vessels) dated 27 Feb. 1980 with an amendment dated 21 April 1989 as well as UVV 17 from the Berufsgenossenschaft (responsible authority [...] p · l <200) and which in group III (200 < p · l ≦1 000) is undertaken at the manufacturer. Vessels with a pressure-litre product above 1 000 must be inspected by TÜV at the operating organisation every