Filtration efficiency in general
Ability of a filter to retain specific test contamination in a hydraulic fluid with a specified contamination concentration under defined test conditions (CETOP RP 100). As the test method for filtration
Digital measured signal
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 .
Action of multiple resistance
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 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
Filter in main conduit
secondary flow (f), as the separate circuit is selected in which a separate filter pump presses the fluid through the filter and mostly also through an oil cooler, independently of the working cycle. See
Flapper-nozzle system
flapper are firmly connected together and are supported by a thin-walled flexible tube. Hydraulic fluid flows continuously from Ps through the two fixed throttles to the nozzles; through the nozzles to
Dissipated heat
power lost by a hydraulic system is converted into heat, which is largely absorbed by the pressure fluid . It is comprised of the pressure losses caused by pipe friction and flow deflections, leakage losses
Mounting wall
its easy access. The disadvantage is how the pressure and delivery flow pulsation in the pressure fluid cause higher noise emissions at the wall, not to mention the large amount of space taken up, the extensive
Rotary transfer joints
Rotary joint for the flow of hydraulic fluid between a stationary and rotating part of the machine. Multiway rotary transfer joints : Rotary transfer joints for supplying one or more loads with pressurised
Nominal size
The details relating to the nominal size of devices used in fluid technology are key variables which do not refer to units or dimensions and do not have to be associated with any numerical variable for