The selection can not be better than the information.

The information that you need, or equipment that you wish us to select for you, needs to reflect this data.

Mass velocity (& mass) gives kinetic energy. Without this, calculations are "guesswork".

Another way to arrive at the same figure is: Flow Rate & SG Example: 1000 Liters/hr & SG 1.15 grams/cm3 1150 kg/hr=.31944 kg/sec. You need to accelerate a mass from zero to that, or to decelerate a mass from that to stop, then, with the acceleration rate, or time / frequency (below), we can tell you how big a cushion you will need, for a given residual pressure / force rise. See Mass Makes the Difference

The frequency of the fluctuation gives the time for acceleration and deceleration forced by a pump.

For example: If a pump has three plungers, is driven at 400 rpm, and is volumetrically efficient then (including "overlap surge") there will be a 24 Hz primary forcing frequency. The volume flow per minute divided by 1440, and divided a factor according to the pump type characteristics, will give the volume of one pulse. From this, and your required residual pulsation, we determine the dampener volume that you need. See Comparative Smoothness Factors by Pump Type.

Viscosity is of most importance in suction systems, the viscous drag can impair pump filling. See Pipe Drag Loss Not Acceleration Head.

Minimum Design Metal Temperature willmaterial selection. Low MDMT requires low carbon, which results in lower working stress, which means more material. Therefore, MDMT affects cost and lead time. Low carbon steel is scarce.

Design Temp for Working Stress __c/f A 316L flange that has a working pressure of 3000 psi at 100 degrees F will be reduced to 2065psi at 400 degrees F.

THEREFORE ALL OF THE DETAILS ARE OF GREAT IMPORTANCE.