Ricerca di "fluid's".

Device that indicates the absolute pressure at a measuring point in a hydraulic fluid, referred to a perfect vacuum.

barometric pressure of a column of fluid (Figure F 23) . They are only suitable for measuring low pressures or differential pressures. Alcohol, water or mercury is used as the fluid. Vertical column pressure gauges

contains an electrical switch, the contact of which is actuated at a given flow of the hydraulic fluid.

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 [...] and also 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

Contact seals for fluid technology are predominantly manufactured from polymer materials in the group "elastic materials". The most important characteristics of these materials are their elasticity (adaptation [...] n to unevenness and to changing pressure), hardness (wear behaviour), resistance in the pressure fluid (swelling behaviour), sliding and friction behaviour, wear resistance among others. The elastic materials [...] thermoplastics for special tasks. Metal materials have become significantly less important for seals in fluid technology. Occasionally there are piston rings and sealing rings made of soft metals that must be

pascal: 1 Pa = 1 N/m2. In fluid technology p is mostly stated in bar (1 bar = 105 N/m2). However, MPa (106 N/m2) is also used. Pressure figures, if not otherwise stated, in fluid technology are to be understood [...] pressure as the reference variable. The pressure of a medium is one of the most important parameters in fluid technology. It occurs, as shown, in numerous variants that each have a specific significance for the

Device for separating small particles of dirt from the hydraulic fluid based on other particle characteristics apart from the particle size.

Collective term for fluid and gaseous media. Here fluids is above all a common term for hydraulic fluids and compressed air.

Range within which the viscosity of a hydraulic fluid satisfies the requirements placed on it. It is defined by operating conditions.

The proportion of hydraulic fluid within the total volume of a hydraulic accumulator that can be removed without causing any damage.