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Flow rate measurement procedure

Defines the quantity of water in m3 (L) that flows through a valve in one hour (minute) with a pressure drop of 1 bar (VDI 2173). The Kv value is therefore a parameter for the selection of valve sizes

The flow coefficient α is a proportionality factor for the calculation of the flow rate through flow resistances, for example the following applies for orifice-shaped resistances with A = geometricall

Flow rate characteristic

Flow rate/pressure characteristic

The shape of a throttle largely defines the change in the throttle cross-section and therefore the characteristic of the flow. As (Figure D 89) shows, with a rectangular cross-section (a) there is a l

As an independent valve : Pressure control valves are used to control or limit the system pressure in a plant or to switch in response to a signal pressure. Depending on the design a differentiation i

The expression characterises the interaction of a throttle function ( throttle valve , continuous directional valve) with a (control throttle) that provides a load pressure independent flow rate with

Device in which the operation pressure p 1 of the primary pressure system is brought to a higher pressure p 2 in the secondary system. The pressure boost factor is given by the ratio of the primary an

The pressure stages to be used in fluid technology are defined in DIN 24 312. They are taken from the preferred figure series R5 or R10 (Table D 3) . From these pressures a selection is defined in DIN