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The sizing of potable pressure vessels can be calculated using the following formula:
V = K x Amax x ((Pmax+1) x (Pmin+1)) / ((Pmax-Pmin) x (Pprec+1))
K = working efficiency of pump (see table)
Amax = average flow (litre/min)
Pmax = Maximum working pressure of the pump (bar)
Pmin = Minimum working pressure of the pump (bar)
Pprec = Pre-charge pressure of the pressure vessel
Please note – always set the pre-charge air pressure of the vessels0.2 bar less than the pump pressure.
