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In fluid technology electro-mechanical used to actuate valves are often referred to as solenoids. These are not permanent magnets, but are electromagnets. An electrical input signal (voltage or current) [...] today apply a compressive force. The return to the initial position is generally via spring force. In fluid technology DC solenoids (voltage or current) and AC solenoids (voltage or current) are available as

feedback control technology as a test function to determine the transfer behaviour of a system (). In >fluid technology, ramps are primarily integrated in the activation of> proportional valves in order to adapt

digital signal processing is increasingly dominant, because the majority of measuring procedures in fluid technology are analogue, it is necessary to use an A/D converter .

the transmission ratio of the pressure amplifier. It is possible to operate with the same pressure fluid and also with different pressure fluids (e.g. compressed air/ oil) in the two pressure systems.

Property of a fluid to act against resistance to the opposite laminar movements of two neighbouring layers (DIN 1342 and IDN 51 550). A distinction is made between dynamic viscosity and kinematic viscosity

The cylinders have two line connections that are separate from each other. By feeding the hydraulic fluid through the two connections, the piston can transfer tensile and compressive forces in both stroke

As with electrics, a distinction is made in fluid technology between series and parallel resistances. For series circuits - as is the case for pipelines - the individual resistances are added ( series

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

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 groups: Emulsions : Concentrates based on mineral oil containing

between the velocity v, the pressure p and the geodetic height h in a flow. The energy of a flowing fluid: Etotal = E pot + E kin + E p = const. Potential energy = E pot = Δm · g · h Bernoulli’s equation