Standards, Pressure — temperature, Capacity – Watts SD-2 User Manual
Page 2: Dimensions (approx.), Typical installations, Notice
Standards
ASSE 1032
Installation: The valve can be installed horizontally or vertically
(flow up or flow down). The valve should be installed such that
the valve is accessible for service and maintenance.
The device should not be installed inside a wall or in a con-
cealed location. Copper tubing shall not be used on the down-
stream side of the backflow preventer used in carbonated sys-
tems. Copper tubing can be used downstream for non carbon-
ated systems such as coffee makers.
Pressure — Temperature
Max. Pressure: 200psi (13.8 bar)
Max. Temperature: 110°F (43°C)
Capacity
kPa psi
207 30
172 25
138 20
103 15
69 10
34 5
0 0
kPa psi
207 30
172 25
138 20
103 15
69 10
34 5
0 0
0 .21 .41 .68 1 1.2 1.5 1.6 1.8
gpm
0 .8 1.5 2.6 3.8 4.6 5.7 6.1 6.8
lpm
0 .25 .61 1.7 2.2 2.4 2.5
gpm
0 .95 2.3 6.5 8.4 9.1 9.5
lpm
Dimensions (Approx.)
Pr
essur
e Dr
op
Pr
essur
e Dr
op
Flow
Flow
1
⁄
4
" (8mm) SD-2
3
⁄
8
" (10mm) SD-2
Typical Installations
A
B
Across
Corners
Water
Supply
SD2 Backflow
Preventer
Valve
Plastic
Pipe
Strainer
(recommended)
Beverage
Dispenser
Water
Supply
Valve
Filter
Pump
100 psi
Carbonator
H
2
O and CO
2
CO
2
gas in a
vented area
Carbonated
Beverage
Dispenser
Strainer
(recommended)
SD2 Backflow Preventer
Valve Size
Assembly
Dimensions
A
B
in
mm
Part #
Order#
in.
mm
in
mm
1
⁄
4
"
8
SD2-MN
0061650
3
76
11
⁄
16
27
1
⁄
4
"
8
SD2-MF
0061651
2
13
⁄
16
71
11
⁄
16
27
3
⁄
8
"
10
SD2-MN
0061654
3
76
11
⁄
16
27
3
⁄
8
"
10
SD2-MF
0061655
3
76
11
⁄
16
27
1
⁄
4
"
8
SD2-FN
0061662
3
76
11
⁄
16
27
1
⁄
4
"
8
SD2-FF
0061660
2
13
⁄
16
71
11
⁄
16
27
3
⁄
8
"
10
SD2-FN
0061663
3
76
11
⁄
16
27
3
⁄
8
"
10
SD2-FF
0061661
3
76
11
⁄
16
27
ES-SD2 1321
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NOTICE