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cross-section constriction (e.g. rounded inlet edge) on which the smallest flow cross-section - unlike on the orifice - is within the geometric cross-section constriction. The pressure losses due to fluid friction

Devices — located along the signal flow — which make up a measuring device and whose measuring characteristics (errors, chain of influences) are specific to the measuring device in question ( Figure M

To that end either –– as in lip seals — the lips are designed to be undersized or oversized, which is then to be stretched or –– as in compact seals and O-rings — the seal body changes shape and is compressed

The effective force F 2eff at the piston shaft for a cylinder . This is derived from the piston area A and the pressure p, having subtracted the friction forces F 2R associated with the seals and guide

task of connecting and linking individual devices. In this way the number of ports - and therefore the risk of leaks - is minimised. The requirements for ease of access and small installation volume are

made in fluid technology between series and parallel resistances. For series circuits - as is the case for pipelines - the individual resistances are added ( series circuit ). This means, for example for

Assembly option for hydraulic valves whereby the required valves for a function — e.g. directional valve, flow valves , high response proportional valves are assembled on top of each other on a base plate

systems , there are throttle valves ( Figure P 27 ) and 2-way and 3-way flow control valves . Here, the throttle ( measuring throttle ) in the form of a 2/2-way or 4/2-way valve is actuated by a proportional [...] fine control range ( Figure P 30 ).Figure P 24: Electric position feedback in a proportional valve Figure P 25: Proportional pressure valve with electric feedback Figure P 26: Pilot-controlled proportional [...] Figure P 27: Proportional throttle valve Figure P 28: Directly controlled proportional directional valve Figure P 29: Proportional directional valve, pilot-controlled with directional valve Figure P 30:

units (generally pistons) performing a linear movement. All displacement machines – with the exception of the screw pumps – can be classified using the aforementioned schematic. Opposite: flow machines . [...] machines the transport process takes place in a circumferential direction and is characterised by the size 2π. The displacement units are gear wheels and moving or rigid barrier elements (vanes). The group of

controls with electrical (electronic) signal processing. As the to the hydraulics - the servo valves and proportional valves - has already been in use for some time, all control system-related developments [...] Electro-hydraulic control technology therefore combines the advantages of electrical signal processing - such as the ease of linking, saving and amplifying electrical signals , ease of compliance with priorities