Flowserve CB 1 Manuale Utente Scaricare il pdf (Pagina 6)

6

Pressure Drop Chart CB 1...

Fig. 3

V

˙

w

= V

˙

·

V

˙

w

= Equivalent water volume flow

in [l/s] or [m³/h]

ρ = Density of fluid (operating condition)

in kg/m³

V

˙

w

= Volume of fluid (operating condition)

in [l/s] or [m³/h]

ρ

1000

The curves given in the chart are valid for

water at 20 °C. To read the pressure drop for

other fluids the equivalent water volume

flowrate must be calculated and used in the

graph.

The values indicated in the chart are applicable

to valves with horizontal flow. With vertical

flow insignificant deviations occur only within

the range of partial opening.

Pressure drop ∆p [bar]

Volume flow V

˙

w

Partial opening

= instable range

Full opening

= stable range

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