Manual

Page 5
LAKOS SST & PRO II Installation and Operations Manual
Materials of Construction
Filter Tanks:A-36carbonsteel;3-inchlowersandcleanoutport;10gaugethickness;powdercoated
inside and outside.
Manifolds:Pipingfor48-inchtanksisstainlesssteel,grooved-endconnections.14gaugewall
thickness.Pipingfor21&32-inchtanksisschedule80PVCpipe.Couplingsareductilesteel.
Backwash Valves: Cast steel body with epoxy coated internal/external. Rear-entry feature for
inspection/replacementofplungerdiaphragm.Stainlesssteelshaft&guidebushing(3-inchvalve:
PVCguidebushing).Stainlesssteeldiscwithvulcanizedrubbertosealthebackwashport.
Controller:Solid-statetiming.StandardLAKOSControlleraccommodates12-voltDCorsolarpower,
110-voltACor220-voltACpowersupply.Upto8stationspercontroller(addcontrollertoslavefor
additional stations). Steel housing.
LAKOS Underdrain: Materialisschedule40PVC,withinjectionmoldedPVCslottedscreenasthe
open area component. Open slotting is internally v-slotted (narrow on the exterior surface, wider on
theinteriorsurface)providinganozzleeffecttomoreeffectivelyintroducewaterintothetankduring
backwashing.Openslotsizeis0.012inchintheslottedscreen.
PRO II General Specications
Model*
Flow Range**
System Manifold
Inlet/Outlet
Grooved
Couplings
System Media
Sand
Requirement
Maximum Filter
Tank Pressure
System
Filtration Area
Recommended
Backwash Flow
Rate Per Tank
Minimum
Backwash
Line Size
4.84 3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
6
6
8
10
10
10
10
12
36
U.S.
gpm
in.
in.
cm.
cm.
lbs. psikg bar
m
3
/hr.
m
3
/hr. ft
2
m
2
36
81
81
188
188
188
188
188
188
188
188
7.2
10.8
16.2
25.1
37.7
50.2
62.8
75.4
87.9
100.4
125.6
0.4510.2 7.6
7.6
7.6
7.6
10.2
10.2
10.2
10.2
10.2
10.2
10.2
10.2
10.2
10.2
10.2
15.2
15.2
20.3
25.4
25.4
25.4
25.4
30.5
8.2
8.2
18.4
18.4
42.7
42.7
42.7
42.7
42.7
42.7
42.7
42.7
0.67
1.00
1.50
2.33
3.50
4.66
5.83
7.00
8.17
9.33
11.67
**Flow range based on a ltration range of 15-25 U.S. gpm/ft
2
(37-61 m
3
/hr/m
2
).
***NOTE: Minimum recommended operating pressure range for proper actuation of LAKOS Backwash Valve is 20 psi (1.4 bar).
The stated ow range is based on a ltration range of 15-25 gpm/ ft
2
. (37-61 m
3
/hr/m
2
).
*Model numbers identify individual tank size/diameter (rst two numbers), inlet/outlet size (second two numbers) and number of tanks per
system (last number).
U.S. gpm