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Head loss, surge pressure

Friction losses

Volume inefficiency

Velocity jump shock

Nomogram Frequency vs. Pipe ID


LDi Catalog Printable PDF 43, 44

Add friction from system flow resistance to "A.H." figure
Also known as Viscous drag, Scrubbing action, Rotary flow, and Reynolds effect.

viscous drag, scrubbing action, rotary flow, reynolds effect

pipe fitting component
Pipe Fitting Component
Round the corner of a Tee
Past a side opening of a Tee
Back into line from a side opening in a Tee
Rounded corner 90° elbow (Long Rad. or L.R.90)
Abrupt 90° elbow ("hard" 90 or Machined "L")
Gentle 45° elbow (Bends & or "5D" 90)
Effective Length of Pipe System
Leff := L+(0.0667xDxT1)+(0.0209xDxT2)+(0.0667xDxT3)+(0.0327xDxE1)+(0.0681xDxE2)+(0.0144xDxE3)
Figures applied for E and T are averages from tests

pulsation analysis calculations


Input Data: Q gpm – GPM (steady state) Volumetric flow rate D – mm Inside Diameter of the pipe v – m2/sec Kinematic Viscosity (approximation, cP “centepoise” to m2/sec multiply by 1 million for water) L – m Length of the pipe P – kg/m3 Density (SG, where 1 gram is 1 ml the n SG=1 Specific Gravity x 1000) Estimating: dP @ peak of flow fluctuations 2. Calculations V – Velocity of the flow in the pipe Re – Reynolds Number Friction Factor: (cold drawn pipe) DPpsi – Pressure loss Scientific Units: Pa = Pascals Q = Mass Flow in cubic meters d = delta difference Dm = Diameter in meters


Pulsation Dampeners at Fluid Flow Control

Fluid Flow Control