23
2.
Divert the brine discharge, and the product water, both into the bucket. Feed flow (brine
discharge and product combined) is usually expressed in Gallons Per Minute or Liters Per
Minute. For the simplest and most accurate measurement, divert exactly 5 gallons or 20
liters, record the time, and calculate GPM or LPM as follows:
60/time in seconds x quantity of water = GPM or LPM
Example: It took 3 minutes (180 seconds) to collect 5 gallons of feed flow, so
60/180 x 5 = 1.67 GPM
*pressure relief valve open ½ turn
In order to make good water, you need the proper amount of feed water flow, as in the table
above. Compare the product flow to the total feed flow. Product flow should be 7% of total flow
for an Aquirer 200, and 9.5% of total flow for an Aquifer 200. If product percentage is low, you
may have an internal leak in the Clark Pump.
For every
1
/
10
th
of a GPM feed water flow loss, we will lose about
1
/
2
gallon per hour of product
flow and the salinity will go up 100 PPM.
Low feed flow combined with low system pressures is most frequently due to a worn ShurFlo
pump head (PL
-
PMP
-
SFPH).
5/23/14
System
Feed
Static *
Feed Flow
Product Flow
Pres-
sure
Pres-
sure
Flow
MIN
MIN
Flow
Flow
MIN
MIN
psi
bar
psi
gpm
lpm
gpm
lpm
gph
lph
gph
lph
Aquifer
150
60
-
70
4.2
-
5
10
-
15
1.7
6.4
1.65
6.2
6.5
24.6
5.7
21.5
Aquifer
200
80
-
90
5.6
-
6.3
20
-
25
1.7
6.4
1.6
6.0
8.3
31.4
7.7
29.1
