Hagen-Poiseuille's law
the compressive force will be balanced out by the opposing force from the internal friction of the fluid resulting from its viscosity . The relationship between flow rate and pressure difference is a linear
Micro-emulsion
HWBF hydraulic fluid where any elements to be mixed into the medium in order, for example, to improve lubricity and increase corrosion protection are added as very small droplets. Micro-emulsions are
Cavitation erosion
of cavitation erosion is much higher when water rather than mineral oils is used as the pressure fluid. Cavitation erosion is a form of particle jet erosion .
Comparability
The more dependent one becomes on determining parameters of fluid devices and systems through trial runs, the more important it is that these results are comparable. Otherwise, the different products will
Swelling of sealants
Increasing the volume of an elastomer seal through the action of the hydraulic fluid. The height of the swelling is different, depending on the seal materials . For example, polyamide swells strongly in
Sealing profile
initiation of the sealing action. On elastomer seals this preload is increased in proportion to the fluid pressure ( automatic sealing ).
Servo technology
that convert a weak input signal into a greatly amplified, proportional (power amplification). In fluid technology : Servo technology stands for an area that uses a power amplifier and a feedback (i.e.
Equivalent bulk modulus
Takes into account along with the compressibility of the pressure fluid also the elasticity of the surrounding components as well as the connection line between the valve and . The equivalent bulk modulus
Flat seals
materials, such as rubber, PTFE, It, asbestos substitute and others. Flat seals are rarely used in fluid technology unlike in motion technology, pipework manufacture etc.
Optimising the controller
A controller, in fluid technology must be configured through fine tuning of the various parameters (e.g. P-component, I-component, etc.) or for state controllers of the amplifiers such that the system