20160126123712.pdf. . . .
For Non -Health Hazard Applications
Job Name
Job Location
Engineer
Approval
Double Check Detector Assemblies
Sizes: 21h" -10" (65 - 250mm)
Series 757DCDA, 757NDCDA Double Check Detector
Assemblies are used to prevent backflow of non -health hazard
pollutants that are objectionable but not toxic, from entering
the potable water supply system. The 757DCDA, 757NDCDA
may be installed under continuous pressure service and may
be subjected to backpressure and backsiphonage. Series
757DCDA, 757NDCDA is used primarily on fire line sprinkler
systems when it Is necessary to monitor unauthorized use of
water.
Features
* Extremely compact design
* 70% Lighter than traditional designs
* 304 (Schedule 40) stainless steel housing & sleeve
* Groove fittings allow integral pipeline adjustment
* Patented tri -link spring check provides lowest pressure loss
* Unmatched ease of serviceability
* Available with grooved butterfly valve shutoffs
* May be used for horizontal, vertical or N pattern installations
* Replaceable check disc rubber
Specifications
The Double Check Detector Assembly shall consist of two
independent tri -link check modules within a single housing,
sleeve access port, four test cocks and two drip tight shutoff
valves. Tri -link checks shall be removable and serviceable, with-
out the use of special tools. The housing shall be constructed
of 304 Schedule 40 stainless steel pipe with groove end con-
nections. Tri-Ilnk checks shall have reversible elastomer discs
and in operation shall produce drip tight closure against reverse
flow caused by backpressure or backsiphonage. The bypass
assembly shall consist of a meter, which registers in either gal-
lon or cubic measurement, a double check backflow assem-
bly and required test cocks. Assembly shall be a Watts Series
757DCDA, 757NDCDA.
Contractor
Approval
Contractor's P.O. No.
Representative
757DCDAOSY
all,.
757NDCDAOSY
The information contained herein Is not intended to replace the
full product installation and safety information available or the
experience of a trained product installer. You are required to
thoroughly read all installation instructions and product safety
information before beginning the installation of this product,
Wens product specifications In U.S. customary units and metric we approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service, Wefts reserves to right to change or modify product design, construction, specifications, or materials Wth-
out prior notice and AW Incurring any obligation to make such changes and modmcetions on Wefts products previously or subsequently, sold. XVWArM
Available Models
Suffix:
OSY - UL/FM outside stem and yoke resilient
seated gate valves
BFG - UVFM grooved gear operated butterfly valves
with tamper switch
*OSY FxG - Flanged inlet gate connection and grooved outlet
gate connection
*OSY GxF - Grooved inlet gate connection and flanged outlet
gate connection
*OSY GxG - Grooved inlet gate connection and grooved outlet
gate connection
Available with grooved NRS gate valves - consult factory*
Post indicator plate and operating nut available - consult factory*
*Consult factory for dimensions
Dimensions — Weight
.............
„---
p
757DCDA, 757NDCDA
open)
757DCDABFG, 757NDCDABFG
Materials
Housing & Sleeve: 304 (Schedule 40) Stainless Steel
Elastomers: EPDM, Silicone and Buna-N
Tri -link Checks: Noryi®, Stainless Steel
Check Discs: Reversible Silicone or EPDM
Test Cocks: Bronze Body Nickel Plated
Pins & Fasteners: 300 Series Stainless Steel
Springs: Stainless Steel
Pressure — Temperature
Temperature Range: 33°F - 140°F (0.5°C - 60°C)
Maximum Working Pressure: 175psi (12.1 bar)
Approvals - Standards
• Approved by the Foundation for Cross -Connection Control
and Hydraulic Research at The University of Southern
California (FCCCHR-USC)
lop/
G � 718
c es ftWOVOO
1048 884,8 (""BFO & OSY Only)
G
A
H
C (OSY)
D
mm
Ire. OR
In.
ft
!n.
mm
In,
mm
65303/4
221/4
781
163/e
416
3'/2
89
3 80
31%
806
187/,
479
311/s
94
4 100
33%
857
22%
578
4
102
6 150
43/2
1105
30'/s
765
51/2
140
8_200
493/4
1264
373/4
959
'', 6" / s
170
10 250
573/4
1467
45%
1162
83/4
208
open)
757DCDABFG, 757NDCDABFG
Materials
Housing & Sleeve: 304 (Schedule 40) Stainless Steel
Elastomers: EPDM, Silicone and Buna-N
Tri -link Checks: Noryi®, Stainless Steel
Check Discs: Reversible Silicone or EPDM
Test Cocks: Bronze Body Nickel Plated
Pins & Fasteners: 300 Series Stainless Steel
Springs: Stainless Steel
Pressure — Temperature
Temperature Range: 33°F - 140°F (0.5°C - 60°C)
Maximum Working Pressure: 175psi (12.1 bar)
Approvals - Standards
• Approved by the Foundation for Cross -Connection Control
and Hydraulic Research at The University of Southern
California (FCCCHR-USC)
lop/
G � 718
c es ftWOVOO
1048 884,8 (""BFO & OSY Only)
G
281/4
H
Ve
In,
mm
In.
mm
29'/ie
738
21'/2
546
301/4
768
221/4
565
33
838
23'/2
597
443/+
1137133'/4
845
541/1,
13751
401A
101
66
1676
1 49'/2
1251
1
281/4
J
Ve
P
311/6
757DCDA
757NDCDA
!n.
mm
In.
mm
In.
mm
lbs.
kns
lbs. k a
151/2
393
813/0
223
133A6
335
139
63
147 61
171/a
435
93/,0
233
141/2
368
159
72
'172 78
18'/2
470
91%
252
153ha
386
175
79
198 9f
233/16
589
1Vie
332
19
483
309
140
350 15!
277h6
697
15111,
399
213he
538 1
494
224
311
321/2
826
175/1,
440
24
610 1
795
361
_L69__12
1 965 43
A C D G 21 �H 546 1 /„ I 379 81'/lo d 223 13 P 330 7 70 CDAB 2 75Ihs. BFG
In. mm In. mm In. mm In. mm In.. ra7m In, mm In. mm In. aapm n. mm kgs.
2"1, 65 273/+ 705 8 203 31/2 89 297/, 759 1h 15 35
3 80
281/4
718
Ve
211
311/6
94
3011/0
779
221/4
565
157/ie
392
93/ts
131/2
343
68
31
4 100
29
737
B15/s
227
311/1,
94
3115/0
811
231/2
597
16'/+
412
9'S/1s
433214'/2
14
356
75
34
6 150
361h
—
927
_.....,
10
254
5
127
433/7,
1097
331/+
845
1911/16
500
13'he
368
131
59
8 200
a
42/+
1086
12 1/i
311
fish
165
511/,
1297
401/,
1019
235/7,92
1511AR
183/,s
462
275
125
Noryl® is a registered trademark of General Electric Company
Capacity
Series 757DCDA, 757NDCDA flow curves as tested by
Underwriters Laboratory.
Flow characteristics collected using butterfly shutoff valves
Horizontal Vertical ------ N - Pattern
It is illegal to use this product in any plumbing system providing water
for human consumption, such as drinking or dishwashing, in the United
States. Before installing standard material product, consult your local
water authority, building and plumbing codes.
Flow capacity chart identifies valve performance
based upon rated water velocity up to 25fps
o Service Flow is typically determined by a rated
velocity of 7.5fps based upon schedule 40 pipe.
o Rated Flow identifies maximum continuous duty
performance determined by AWWA.
a UL Flow Rate is 150% of Rated Flow and is not
recommended for continuous duty.
e AWWA Manual M22 [Appendix C] recommends
that the maximum water velocity in services be
not more than 10fps.
6" (150mm)
psi Service Row Rated Row 'IR. Rated Flew
12 N
10 ♦ H
v
4
2
0
0 300 600 900 1200 1500 gpm
0 1140 2280 3420 4560 5700 Ipm
7.5 12 fps
psi
12
10
8
6
4
2
0
0
0
8" (200mm)
500 1000 1500 2000 2500
1900 3800 5700 7600 9500
7.5 10
psi 10" (250mm)
Service now Rated Row "10. Rated Row
12
10 .. N
g ♦ H
v
6� ��_
4�
2
0
gpm
Ipm
fps
0 500 1000 1500 2000 2500 3000 3500 gpm
0 1900 3800 5700 7600 9500 11400 13300 Ipm
7.5 10 fps
Inquire with governing authorities for local installation
requirements
2',h" (65mm)
(100mm)
si
PSI
service Row Rated Row
'UL Rated Row
"UL Rated Row
14
12
10
_ H
12
20
N
.....
10
v
i�
_
--
v
----p
0
100 200 300
400 500
gpm
12
0
380 760 1140
1520 1900
Ipm
7.5 15
fps
..
�,
4-
4
2 2
0
0
0 100
200 300
400 500 600 700 800
0
50 100 150 200 250
300 350 gpm
760 1140
0
190 380 570 760 950
1140 1330 Ipm
7.5
7.5 15
fps
It is illegal to use this product in any plumbing system providing water
for human consumption, such as drinking or dishwashing, in the United
States. Before installing standard material product, consult your local
water authority, building and plumbing codes.
Flow capacity chart identifies valve performance
based upon rated water velocity up to 25fps
o Service Flow is typically determined by a rated
velocity of 7.5fps based upon schedule 40 pipe.
o Rated Flow identifies maximum continuous duty
performance determined by AWWA.
a UL Flow Rate is 150% of Rated Flow and is not
recommended for continuous duty.
e AWWA Manual M22 [Appendix C] recommends
that the maximum water velocity in services be
not more than 10fps.
6" (150mm)
psi Service Row Rated Row 'IR. Rated Flew
12 N
10 ♦ H
v
4
2
0
0 300 600 900 1200 1500 gpm
0 1140 2280 3420 4560 5700 Ipm
7.5 12 fps
psi
12
10
8
6
4
2
0
0
0
8" (200mm)
500 1000 1500 2000 2500
1900 3800 5700 7600 9500
7.5 10
psi 10" (250mm)
Service now Rated Row "10. Rated Row
12
10 .. N
g ♦ H
v
6� ��_
4�
2
0
gpm
Ipm
fps
0 500 1000 1500 2000 2500 3000 3500 gpm
0 1900 3800 5700 7600 9500 11400 13300 Ipm
7.5 10 fps
Inquire with governing authorities for local installation
requirements
3" (80mm)
(100mm)
si
psi
p
Samoa Row Rated Row
"UL Rated Row
12
10
_ H
6♦
20
.....
v
2
_
--
----p
0
100 200 300
400 500
gpm
12
0
380 760 1140
1520 1900
Ipm
7.5 15
fps
It is illegal to use this product in any plumbing system providing water
for human consumption, such as drinking or dishwashing, in the United
States. Before installing standard material product, consult your local
water authority, building and plumbing codes.
Flow capacity chart identifies valve performance
based upon rated water velocity up to 25fps
o Service Flow is typically determined by a rated
velocity of 7.5fps based upon schedule 40 pipe.
o Rated Flow identifies maximum continuous duty
performance determined by AWWA.
a UL Flow Rate is 150% of Rated Flow and is not
recommended for continuous duty.
e AWWA Manual M22 [Appendix C] recommends
that the maximum water velocity in services be
not more than 10fps.
6" (150mm)
psi Service Row Rated Row 'IR. Rated Flew
12 N
10 ♦ H
v
4
2
0
0 300 600 900 1200 1500 gpm
0 1140 2280 3420 4560 5700 Ipm
7.5 12 fps
psi
12
10
8
6
4
2
0
0
0
8" (200mm)
500 1000 1500 2000 2500
1900 3800 5700 7600 9500
7.5 10
psi 10" (250mm)
Service now Rated Row "10. Rated Row
12
10 .. N
g ♦ H
v
6� ��_
4�
2
0
gpm
Ipm
fps
0 500 1000 1500 2000 2500 3000 3500 gpm
0 1900 3800 5700 7600 9500 11400 13300 Ipm
7.5 10 fps
Inquire with governing authorities for local installation
requirements
4"
(100mm)
psi
Samoa Row
Rated Row Mt. Ratad Row
24
20
.....
v
16
--
----p
=
H
12
4
0
0 100
200 300
400 500 600 700 800
gpm
0 380
760 1140
1520 1900 2280 2660 3040
Ipm
7.5
13
fps
It is illegal to use this product in any plumbing system providing water
for human consumption, such as drinking or dishwashing, in the United
States. Before installing standard material product, consult your local
water authority, building and plumbing codes.
Flow capacity chart identifies valve performance
based upon rated water velocity up to 25fps
o Service Flow is typically determined by a rated
velocity of 7.5fps based upon schedule 40 pipe.
o Rated Flow identifies maximum continuous duty
performance determined by AWWA.
a UL Flow Rate is 150% of Rated Flow and is not
recommended for continuous duty.
e AWWA Manual M22 [Appendix C] recommends
that the maximum water velocity in services be
not more than 10fps.
6" (150mm)
psi Service Row Rated Row 'IR. Rated Flew
12 N
10 ♦ H
v
4
2
0
0 300 600 900 1200 1500 gpm
0 1140 2280 3420 4560 5700 Ipm
7.5 12 fps
psi
12
10
8
6
4
2
0
0
0
8" (200mm)
500 1000 1500 2000 2500
1900 3800 5700 7600 9500
7.5 10
psi 10" (250mm)
Service now Rated Row "10. Rated Row
12
10 .. N
g ♦ H
v
6� ��_
4�
2
0
gpm
Ipm
fps
0 500 1000 1500 2000 2500 3000 3500 gpm
0 1900 3800 5700 7600 9500 11400 13300 Ipm
7.5 10 fps
Inquire with governing authorities for local installation
requirements
d
A Watts Water Technologies Company USA: Tel: (978) 689-6066 • Fax: (978) 976-8350 • Wetts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • Wetts.ca
Latin America: Tel: (52) 81-1001-8600 a Fax: (52) 81-8000-7091 • Watts.com
ES-757DCDA_757NDCDA 1503 0 2015 Watts