HomeMy WebLinkAboutDrawingsES-919
Job Name .
Job Location
Engineer —
Approval —
Series 919
Reduced Pressure Zone
Assemblies
Sizes: Ya" — 2" (5 — 50mm)
Series 919 Reduced Pressure Zone Backflow Assemblies are
designed to protect potable water supplies in accordance with
national plumbing codes and water authority requirements. This
series can be used in a variety of installations, including the preven-
tion of health hazard cross -connections or for containment at the
service line entrance.
This series features two poppet style check valves, replaceable
check seats, with an Intermediate relief valve. Its compact modular
design facilitates easy maintenance and assembly access, Sizes''/a"
— 1" (5 — 25mm) shutoffs have tee handles.
Features
Contractor
Approval
Contractor's P.O. No.
Representative —
• Separate access covers for the check valves and relief valve for
Specifications
ease of maintenance
• Top entry -all check internals easily accessible
A Reduced Pressure Zone Assembly shall be installed at each
potential health hazard location to prevent backflow due to back-
• All rubber elastomers of chloramine resistant material
siphonage and/or backpressure. The assembly shall consist of a
• Check valve poppet assemblies are fully guided by innovative
pressure differential relief valve located in a zone between two posi-
plastic seat guide
tive seating check valves. Seats and seat discs shall be replace-
able in both check valves and the relief valve without the use of
• Replaceable push -in check valve and relief valve seats
special tools. Service of all internal check valve components shall
eliminates threads from the water way
be through top mounted access bronze covers threaded to the
• FZ twist relief valve cover quarter -turn locking joint captures
main valve body. The check valve poppet assembly shall be guided
the sprang bad during repair to facilitate disassembly
via the use of a corrosion resistant plastic guide. The check valve
• Innovative check valve plastic cover bushing provides trouble
and relief valve seats shall be push -in type. The relief valve cover
shall be bronze construction secured with stainless steel bolts and
free guiding of the check valve poppet
9 9 P
shall utilize a quarter-tum locking joint to capture the spring load
• Bottom mounted relief valve provides reduced installation clear-
of the relief valve. The relief valve shall have an internal sensing line
ances
to sense the inlet water supply. Al rubber elastomers shall be of
• Compact, space saving design
chloramine resistant material. The assembly shall also include two
resilient seated isolation valves, four top -mounted resilient seated
• No special tools required for servicing
test cocks and an air gap drain fitting. The assembly shall be a
• Top mounted test cocks for ease in testing and reduced installa-
Watts Series 919.
tion clearances
• Standardly furnished with NPT body connections
Now Available
WattsBox Insulated Enclosures.
For more information, refer to literature ES-WB.
Inquire with governing authorities for local installation requirements
Walls product specifications in U.S. customers mails and metric are approximate any are desI forrefemirz only. For precise measurements, M WA�0
please contact Watts Technical Service. Welts reserves the nghtto change or motllty protluct uct tleslgn, conNuction, specifications or materia6 wiN-
out pyor notice antl witlnut Incurring any obllgatlon to make such changes anal modifications an Walls prod" previously or subSOQUerIVr'seq.
Available Models
Suffix:
QT - quarter -turn ball valves
S - bronze strainer
LF - without shutoff valves
AQT - elbow fitting for 3600 rotation
ZQT - inlet & outlet flow up
Prefix:
U - union connections
Materials
Body: Bronze
Discs: Silicone rubber
Check Seats: Replaceable polymer
Cover Bobs: Stainless steel
Approvals
G`p55Ifr3o
E)0" o ®Ru C fit. US
1013 'A"-2"LF
Approved by the Foundation for Cross -Connection Control and
Research at The University of Southern California (for sizes 3/4" -2")
Dimensions — Weights
E----------------- E-------------------I
9190T, 919QT-S
Pressure — Temperature
Temperature Range: 330E - 180OF (0.50C - 820C)
Maximum Wonting Pressure: 175psi (12.1 bar)
Air Gaps
AIR GAP MODEL
SIZES
DIMENSIONS
WEIGHT
A
in. rum
8
in. mm
C WEI
in. rum
lbs. kg.
919AGC
1'h"-1"
2b6 60
34S 79
'h 13
0.63 0.28
919AGF
1 1'h"-2-
4% 1111
87A8 214
1 2 51
3.5 1.6
U
(11111)
DIMENSIONSSIZE
In, rum
In.
A
rum
8
in. rum
In.
C
mm
0
In. rum
E M
in. mm
F
M.
mm
G
In.
mm
H
In.
rum
M
in.
mm
N
In.
mm
9190T
lbs. kgs.
919OT-S
lbs. kgs.
1/4 8
91/2
241
67/8 175
27/e
73
121/a 314
04 146
3
75
13/e
35
19/16
40
21/a
60
21/2
64
5.8 26
63 2
3
'h
241
67/a 17
27/a
7
'/8 4
5'/4 146
3' 3
84
13/4
44
19h6
40
23/a
60
2'/2
64
5.8 2.6
6 2
'h 15
91/2
241
67/a 17
2%
7
123/4 4
53/d 146
33/a
86
V/e
48
19h6
40
23/4
70
2'1
7
5.8 2.6
63 2
314 20
121/8
307
77/16 188
3'h
88
151h 393
71111s 195
35/e
92
21hs
52
19/,s
40
15/a
41
33h6
81
8.3 3.7
10.0 4.5
1 25
141h
368
8 202
37/e
98
193/16 487
93f18 233
4
102
27h6
62
19Aa
40
21/8
54
33/4
95
11.8 5.4
13.8 6.3
11/4 32
181/e
461
117/,6 290
5'1'
129
23'/4 591
1111/16 297
5'/8
130
25/8
67
21h
64
21h
64
47h6
113
22.3 10.1
26.3 11.9
1%40
183/4
476
117/,s 290
54/a
129
25'hs 637
1111/16 297
55/8
143
3'/a
79
21h
64
3
76
47/e
124
28.3 12.8
32.0 14.5
2 50
2Phs
535
121hs 307
55/8
142
2813/16 732
133/a 340
515/1e 151
31/16
87
21h
64
39hs
90
515h6 151
3Z3 16.9
45.0 20.4
E
Capacities — 919QT — U919QT — — — - 919AQT — — — 919ZQT
kPa psi 1/4" (5 mm) kPa psi 1 " (25mm)
138 20 172 25
103 15 136 20
69 10 r +�
J 103 15 ~ '
934 5 69 10
0 0 p�, 34 5
0 .25 .5 .75 1 1.25 1.5 gpm
0 2 1.9 2.8 3.8 4.7 5.7Ipm 0 0
0 10 20 30 40 50 60 gpm
Flow Rate 0 38 76 114 152 190 228 Ipm
Flow Rate
kPa psi 3/s' (8 mm) kPa psi
is 138 20 172 25
3103 15 9 138 20
69 10 1103 15
to
IL34 5 m
CL 69 t0
0 0
0 .5 1 1.5 2 2.5 3 3.5 4 4.5 gpm 34 5
0 1.9 3.8 5.7 7.6 9.5 11.4 13.2 15.1 17.0Ipm
0 0
11/4" (32mm)
FM
Flow Rate 0 10 20 30 40 50 60 70 60 gpm
0 38 76 114 152 190 228 266 3M Ipm
Flow Rate
kPa psi 'h" (1 2 mm) kPa p
172 25 138 2
j 138 20 H
E! 103 15 103 1
� m
69 10
d 34 5 69 t
0 0 d 34
0 2.5 5 7.5 10 12.5 15 gpm
0 9.5 17.0 28.4 38 47 57Ipm 0
Flow Rate
0t
0
0
kPa psi 3/4" (20mm) kPa psi
207 30 00 138 20
J 172 25
138 20 J 103 15
O
103 15 WO
fig10 **•+�*. ... ........, ........ .....
69 10
Vl
61
34 5 tL 34 5
0 0
0 10 20 30 40 50 gpm
0 0
0 38 76 114 152 190 OM 0
Flow Rate
IMWA7'm
A Watts Water Technologies Company
ES-919 1410
0
11/2" (40mm)
20 40 60 80
76 152 228 304
Flow Rate
2" (50mm)
50 100
190 380
Flow Rate
100 120 gpm
390 456Ipm
150 200 gpm
570 760 Ipm
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 " Fax: (905) 332-7068 • www.watts.ca
0 2014 Watts
U919QTI U919QT-S
SIZE (m)
DIMENSIONS
STRAINER
DIMENSIONS
in. mm
A
in. mm
B
in. mm
C
in. mm
D
in. mm
E(LFl
in. mm
F
in. mm
G
in. mm
H
in. mm
M
in. mm
N
in. mm
U9190T
Ibs. kgs.
U919OT-S
Ibs kgs.
3/4 20
1615/16 430
8'/ts 204
3'/s 98
205/1e 515
111h 292
35/8 92
2'/16 52
19/16 40
15/8 41
39/1s 81
13A 6.1
15.1 6.9
1 25
17'/s 435
8'/16 204
3'/s 98
2113/16 554
113/4 297
4 102
21/16 62
19/1s 40
21/a 54
33/4 95
13.3 6.0
15.3 6.9
11/4 32
2015/16 532
111'hs 290
5'/e 129
1 261/16 662
1 153/8 390
1 5'/a 130
1 25/8 671
2'h 64
1 21h 64
1 4'/16 113
25.9 11.8
29.9 13.6
1'h 40
219/% 547
117/16 290
5'/s 129
1 277/a 7081
153/8 390
55/8 143
3'/s 791
21h 641
3 76
1 4'/a 124
31.9 14.5
35.6 16.2
2 50
2415/16 6331
121/1s 307
1 55/s 142
32"/16 8301
163/4 425
51'/16 151
31/16 87
1 21h 64
39/16 90
1 515/t6 151
41.6 18.9
49.3 22.4
919AQT,919ZQT
SIZE
(ON)
DIMENSIONS
WEIGHT
in.
mm
A
in.
mm
B
in.
mm
C
in.
mm
D
in.
mm
E (LF)
in.
mm
F
in.
mm
G
in.
mm
H
in.
mm
lbs.
kgs.
3/4
20
103/a
263
315/16
100
315/16
100
31/2
88
711/m
195
35/8
92
2'/16
52
19/16
40
9.3
4.2
1
25
121/4
311
413/16
122
413/16
122
37/8
98
93/16
233
4
102
27/16
62
19/16
40
13.3
6.0
11/4
32
161/16
407
57/8
149
57/s
149
51/a
129
11 "/is
297
51/8
130
25/8
67
21h
64
24.0
10.9
1'h
40
165/8
421
61/2
164
61/2
164
5'/s
129
l l "/16
297
55/s
143
31/8
79
21/2
64
30.5
1
13.8
2
50
175/16
440
65/8
168
69/t6
166
5'/s
142
133/8
340
515/16
151
37h6
87
21h
64
40.6
18.4