Oil-in-water emulsion
High Water Based Fluid (HWBF) .
Piloting line
Hydraulic fluid line for control tasks.
Dynamic viscosity
the leakage losses in gaps. The dynamic viscosity is a specific variable for every fluid and that for Newtonian fluids is dependent on the temperature and the pressure. Its unit is Pa · s. The old unit [...] Between the shear stress τ = F/A and the velocity gradients in a moving fluid (Figure D 93) the following relationship applies: The proportionality factor η is called the dynamic viscosity . It is a measure [...] measure of the internal resistance that opposes displacement of neighbouring layers in the fluid. As such the dynamic viscosity has a very significant influence on the friction of the flowing medium and
Cavitation
temperatures at certain places in the fluid and changes in the resistance characteristics of hydraulic resistances Cavitation refers to the formation of cavities in fluids. Cavities start to from when the local [...] local static pressure within a fluid falls below a critical value. This critical value is generally about as high as the vapour pressure for the fluid. Cavitation may take the form of: flow cavitation [...] and gas cavitation, depending on whether the cavitation bubbles contain fluid vapour or a gas such as air dissolved in the fluid. For example, water only dissolves small quantities of air. This is why
Symbols
the function of a fluid device (not its construction design) in accordance with a standard or a key. The symbols were previously known as switching symbols. The symbols used in fluid switching technology
Pressure oscillation
Oscillation in a pressure fluid that is caused by pressure pulsation.
Working lines
Main lines that are used to transport energy using hydraulic fluids.
Hydrostatic energy
Energy produced by the effect of the pressure of a fluid.
Sealing compatibility index (DVI)
materials in different hydraulic fluids that can range from shrinkage, through slight swelling, to complete dissolution of the elastomer. If the DVI of the intended hydraulic fluid is known, with the aid of diagrams
Hydrokinetics
the flow of fluids with low compressibility and little internal friction. In hydrokinetics, the transmission of energy mainly occurs via the kinetic energy associated with the flowing fluid. This is why