Method For Calculating Required Accumulator Volume - Prominent Pp Betriebsanleitung

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Method for calculating required accumulator volume

Method for calculating required accumulator
volume
(for simple-action pumps)
Estimating the required volume V
approx. ±5 % (from pump type and system pressure Pm feed rate Q
and stroke frequency f):
V = 0.8 * F * C * VH
0
where
V = accumulator volume
0
F = pump design type factor, see table 1
C = conversion factor: at Pm * 1.1, read off table 2
Pm: system pressure (bar)
VH = Stroke volume (ml/stroke) at average operating pressure (see
pump performance data)
Table 1: pump design type factor
Pump design type
1-cylinder pump
2-cylinder pump
3-cylinder pump
4-cylinder pump
Example:
Basic data
Pump type:
Stroke volume VH:
Operating pressure Pm: 5.5 bar
Therefore
C = 3.378 (for 1.1 * Pm = 5.5 (see tab. 2)
F = 26 (for 1-cylinder metering pumps (see tab. 1)
and
V = 0.8 * C * F * VH = 0.0008 * 3.378 * 26 * 0.46 = 0.032 l
0
Choose accumulator with V = 0.15 l or V = 0.35 l.
in litres for a residual pulsation of
0
F
26
12
6
6
gamma/ L, type 1005,
1-cylinder metering pump
0.46 ml/stroke
(at average operating pressure)
37