Watts PWR8024 - Manual (Page 11)

11
VI. Appendix
The following tables are intended as a guide to determining the flow
rates for the PWR8024 series RO systems. All flows are in gallons
per minute (GPM).
Nominal flows for systems with reject recycle and a feed water
Silt Density Index less than 3.
moDel numbeR PWR80243085 PWR80243125 PWR80243165 PWR80243205
Product (max) 40 60 80 100
Reject 25 35 45 55
moDel numbeR PWR80243085 PWR80243125 PWR80243165 PWR80243205
Product (max) 34 51 68 85
Reject 19 28 37 46
moDel numbeR PWR80243085 PWR80243125 PWR80243165 PWR80243205
Product (max) 40 60 80 100
Reject 14 20 27 34
Reject Recycle 11 15 18 21
moDel numbeR PWR80243085 PWR80243125 PWR80243165 PWR80243205
Product (max) 34 51 68 85
Reject 12 17 23 29
Reject Recycle 7 11 14 17
V. Membrane Replacement
1. Turn off the system and close the feed water shutoff valve.
2. Disconnect the membrane feed hoses by loosing the brass fit-
tings between the end of the hoses and the pressure vessel end
caps.
3. Remove the retaining rings from the pressure vessels.
4. Push the old membrane out of the vessel in the direction of the
feed flow.
5. Record the serial numbers of the new membranes.
6. Lightly lubricate the brine seals on the new membranes with
clean water.
7. I nstall the new membranes in the direction of flow with the brine
seal end going in last.
Note: Be sure to install an interconnector between the mem-
branes in each pressure vessel.
8. Lightly lubricate the end cap internal and external o-rings with
glycerin.
9. Install the end caps and secure them with the retaining rings.
10. Install the membrane feed hoses.
11. Verify that all retaining rings are installed.
12. Follow the start up procedure in section III-D.
Brine
Seal
Flow Direction
Membrane
Nominal flows for systems with reject recycle and a feed water
Silt Density Index less than 3.
Nominal flows for systems not using reject recycle and a feed
water Silt Density Index of 3 to less than 5.
Nominal flows for systems with reject recycle and a feed water
Silt Density Index of 3 to less than 5.
°c °F coRRection FactoR
30 86 1.16
29 84.2 1.13
28 82.4 1.09
27 80.6 1.06
26 78.8 1.03
25 77 1.00
24 75.2 0.97
23 73.4 0.94
22 71.6 0.92
21 69.8 0.89
20 68 0.86
19 66.2 0.84
18 64.4 0.81
17 62.6 0.79
16 60.8 0.77
15 59 0.74
14 57.2 0.72
13 55.4 0.70
12 53.6 0.68
11 51.8 0.66
10 50 0.64
9 48.2 0.62
8 46.4 0.61
7 44.6 0.59
6 42.8 0.57
5 41 0.55
Multiply the nominal product flow at 25° C by the temperature correction factor to
determine the flow at various other temperatures.
Temperature Correction Factors