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Show all categories Calculation of pressure loss Back

Calculation of pressure loss

Calculation: Pressure loss by fittings Auxiliary table: Drag coefficient (Zeta) of a pipe bend according to bend radius (r) and pipe diameter (d)
r/d124610
Zeta0,50,30,230,180,2
Quantity
Total =

Auxiliary table: Drag coefficient (Zeta) of a pipe bend with pipe diameter large (dgroß) and pipe diameter small (dklein)
dgroß/dklein0,10,30,50,60,80,9
Zeta0,450,420,380,30,170,09
Quantity
Total =

Auxiliary table: Drag coefficient (Zeta) of an elbow fitting according to elbow angle (alpha)
alpha10°15°30°45°60°90°
Zeta0,040,060,150,30,61,2
Quantity
Total =

Auxiliary table: Drag coefficient (Zeta) of various fittings
FittingZetaQuantityTotal
Inlet/outlet connection at tank, Type 10,06
Inlet/outlet connection at tank, Type 2 0,56
Inlet/outlet connection at tank, Type 3 2,8
Ball valve0,6
Y-valve0,6
DIN shutoff valve3,9
Corner valve3,0
Solenoid valve6,0
Non-return valve6,0
Clack or needle flow detector5,8
Float element flow meter6,5

Zeta Drag coefficient Zeta [] (total for all individual fittings)
Q Flow rate / Dosing rate [l/h]
w Flow velocity [m/s]
d Pipe diameter [mm]
Density Chemical density [kg/dm3] (Water = 1.0)
decimal places
pA Pressure loss by fittings [bar] [calculated by w]
pA Pressure loss by fittings [bar] [calculated according to Q and d]



Rough calculation for clean pipes
n (dynamic) viscosity [mPa*s] (e.g. salt solution = 23.6)
w Flow velocity [m/s]
d Pipe diameter [mm]
L Pipe line length [m]
Density Chemical density [kg/dm3] (Water = 1.0)
decimal places
Re Reynold number [r] [<2320 Strömung laminar, >2320 turbulent]
pR Pressure loss in pipe line [bar]



Total pressure loss
Total pressure loss=pressure loss by fittings + pressure loss in pipe line
pG=pA + pR
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