PulseGuard Pulsation Dampeners

Fluid Flow Control Animations
PulseGuard Pulsation Dampeners
Contact PulseGuard
 

Dampeners Calculations - Piping Flow Friction Pulsation

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

1. Input Data, GPM steady state Q = 41 Volumetric flow rate, mm D = 38 Inside diameter of the pipe, M2/sec v = 1.9 x 10(-6) Kinematic viscosity (Approx. CP “centePoise”, to m2/sec, multiply by 1 million for water), m L = 218 Length of the pipe, kg/m3 p = 980 Density (Specific Gravity x 1000)Input Data, Volumetric flow rate, Inside diameter of the pipe, Kinematic viscosity, Length of the pipe, Density (Specific Gravity x 1000)
Estimating dP at peak of flow fluctuations. To find the increase in pulsation from flow fluctuation, assume maximum fluctuation from simplex pump is 3.25 x steady state Q. Divide 3.25Q by F number for your pump type. Add the result to steady state Q. Run formula with increased Deduct dP from this new dP. difference is pulsation
Pipe Fitting Component Fittings
Round the corner of a Tee T1 = 1
Past a side opening of a Tee T2 = 3
Back into line from a side opening in a Tee T3 = 1
Rounded corner 90° elbow (Long Rad. or L.R.90) E1 = 2
Abrupt 90° elbow ("hard" 90 or Machined "L") E2 = 9
Gentle 45° elbow (Bends & or "5D" 90) E3 = 2
Effective Length of Pipe System

Leff = L + (0.0667 x D x T1) + (0.0209 x D x T2) + (0.0667 x D x T3) + (0.0327 x D x E1) + (0.0681 x D x E2) + (0.0144 x D x E3) - Figures applied for E and T are averages from tests


2. CALCULATIONS
2.1 Velocity V of the flow in the pipe:
Pulsation Dampener Calculations
2.2. Reynolds Number:
Pulsation Dampener Calculations
2.3 Friction Factor: (cold drawn pipe)
Pulsation Dampener Calculations
Scientific Units, Pa = Pascals, Q = Mass flow cubic meters, d = delta difference , Dm = diameters meters
2.4. Pressure loss:
Pulsation Dampener CalculationsPulsation Dampener Calculations
gpm steady state input data volumetric flow rate inside diameter of the pipe kinematic viscosity length of the pipe Density (Specific Gravity x 1000) (Approx. CP “centePoise” to m2/sec, multiply by 1 million for water) Estimating dP at peak of flow fluctuations To find the increase in pulsation from flow fluctuation, assume maximum fluctuation from simplex pump is 3.25 x steady state Q. Divide 3.25Q by “F” number for your pump type. Add the result to your steady state Q. Run the formula with your increased Q. Deduct steady state dP from this new dP. The difference is pulsation dP.

 



Fluid Flow Control Pulsation Dampeners