Xylem BMAID R4 - Manual (Page 46)

PAGE 46
Residential Water Systems
CentriPro
tablE 2 – prESSurE faCtorS
pump Cut-In pressure – pSIG
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115
30 .22
35 .30 .20
40 .37 .27 .18
45 .42 .34 .25 .17
50 .46 .39 .31 .23 .15
55 .50 .43 .36 .29 .22 .14
60 .54 .47 .40 .33 .27 .20 .13
65 .50 .44 .38 .31 .25 .19 .13
70 .53 .47 .41 .35 .30 .24 .18 .12
75
.50 .45 .39 .33 .28 .22 .17 .11
80 .53 .48 .42 .37 .32 .26 .21 .16 .11
85 .50 .45 .40 .35 .30 .25 .20 .15 .10
90 .53 .48 .43 .38 .33 .29 .24 .19 .14 .10
95 .50 .46 .41 .36 .32 .27 .23 .18 .14 .09
100 .52 .48 .44 .39 .35 .31 .26 .22 .17 .13 .09
105 .50 .46 .42 .38 .33 .29 .25 .21 .17 .13 .08
110 .52 .46 .44 .40 .36 .32 .28 .24 .20 .16 .12
115 .50 .46 .42 .39 .35 .31 .27 .23 .19 .15 .12 .06
120 .52 .48 .45 .41 .37 .33 .30 .26 .22 .19 .15 .11
125 .50 .47 .43 .39 .36 .32 .29 .25 .21 .16 .14 .11 .07
To determine tank drawdown of operating pressure ranges other than those listed in table, use following procedure:
Multiply total tank volume (table 1) by pressure factor (table 4).
Example: Operating range: 35/55
Tank being used: V-200
65.1 = Total volume of tank (table 1)
x .29
Pressure factor (table 4)
18.9 = Drawdown in gallons at 35/55 PSI operating range.
pump Cut-
o
ut
pr
essur
e –
p
SIG
tablE 1 – taNk moDElS – See your Full Line Catalog Tank Bulletins for a listing of all available models.
① Drawdown based on a 22 psi differential and Boyle’s Law. Tem-
perature, elevation and pressure can all affect drawdown volume.
hyDropro aND CENtrIpro taNk SElECtIoN
tank Drawdown pressure factors using an “Extra”
2 pSI of Drawdown
pressure Differential factor with extra 2 psi*
18 – 40 .402
28 – 50 .340
38 – 60 .295
48 – 70 .260
To Calculate drawdown capacity multiply: Factor x Tank Volume.
model
No.
total
Volume
(Gals.)
① Drawdown in Gals. at System
operating pressure range of
maximum
Drawdown
Volume
(Gallons)
18/40
pSIG
28/50
pSIG
38/60
pSIG
V6P 1.9 0.7 0.6 0.5 1.3
V15P 4.9 1.8 1.5 1.4 3.1
V25P 7.3 2.7 2.3 2.1 3.1
V45P 13.9 5.6 4.7 4.1 8.4
V45 13.9 5.6 4.7 4.1 8.4
V60B 19.9 8.0 6.8 5.8 12.1
V60 19.9 8.0 6.8 5.8 12.1
V80 25.9 10.4 8.8 7.6 13.9
V80EX 25.9 10.4 8.8 7.6 13.9
V100 31.8 12.8 10.8 9.4 13.8
V100S 31.8 12.8 10.8 9.4 13.8
V140B 45.2 18.2 15.4 13.3 27.3
V140 45.2 18.2 15.4 13.3 27.3
V200 65.1 26.2 22.1 19.2 39.3
V250 83.5 33.6 28.4 25.6 50.8
V260 84.9 34.1 28.9 25.0 44.7
V350 115.9 46.6 39.4 34.1 70.5