LDi Catalog Printable PDF46
Check the amplitude of any highly excitational pressure spikes
In pump literature a.k.a. "Velocity Jump" causing "Joukowsky shock"
You can reduce "Velocity Jump Shock" to a generally insignificant figure in 4 simple steps:
1. Select a dampener with an ID 12 times the diameter of the inlet connection. 2. Have an outlet 1/2 the area of the inlet. 3. Increase the volume by 3 times the inefficiency. 4. Decrease the cushion pre-fill pressure proportionately to the volume increase, from 80% of system pressure to as low as 50%.
The combined effect of mass acceleration, velocity jump, pressure wave acoustics, fittings and pipe resistance all in a time dependent frame, along with valve action, and pump characteristics may be modeled for you by: LDi PulseView software. This is not a free service. Please complete input data set tabulation.