HomeMy WebLinkAboutProject Information RECEIU'D JUL 112017
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ZURN. Model 720A
WILKINS Pressure Vacuum Breaker Assembly
Application
Designed for installation on potable water lines to protect
against backsiphonage of contaminated water into the po-
table water supply.Assembly shall provide protection where
a potential health hazard exists.
;Q
Standards Compliancew '
•ASSEO Listed 1020
• IAPM00 Listed
•CSA O Certified -
•Approved by the Foundation for Cross-ConnectionControl
and Hydraulic Research at the University of Southern
California
Materials
Main valve body Cast Bronze ASTM B584
Fasteners Stainless Steel,300 Series Options(Suffixes can be combined)
Elastomers Silicone(FDA approved) ❑ - with full port QT ball valves(standard)
Buna Nitrile(FDA approved)
Polymers Polypropylene(FDA approved) Accessories
Delrin0(FDA approved) ❑ Repair kit(complete)
Springs Stainless Steel,300 series ❑ Water Hammer Arrester(Model 1250)
❑ QT-SET Quick Test Fitting Set
Features
Sizes: 1/2",3/4", 1", 1 1/4", 1 1/2",2"
Maximum working water pressure 150 PSI
Maximum working water temperature 110°F
Hydrostatic test pressure 300 PSI
End connections threaded ANSI 81.20.1
D I-- B
O
A
�EV
C
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Dimensions&Weights(do not include pkg.)
MODEL SIZE I DIMENSIONS(approximate) WEIGHT
A B C D LESS BV WITH BV
in. mm in. mm in. mm in. mm in. mm lbs. kg lbs. kg
1/2 15 71/8 181 41/16 103 41/4 108 21/4 57 4 1.8 6 2.7
3/4 20 73/16 183 1 45/16 110 1 45/16 110 23/8 60 1 4 1.8 6 2.7
1 25 73/4 197 4 5/8 117 43/4 121 2 5/8 67 4 1.8 8 3.6
1 1/4 1 32 1 11 279 77/16 189 77/16 189 31/8 79 14 6.4 20 9
1 1/2 40 101/2 267 7 178 7 178 3 1/8 79 14 6.4 20 9
2 50 11 1/16 281 79/16 192 711/16 195 31/8 79 14 6.4 26 10.4
Zurn Industries,LLC I Wilkins Rev.A
1747 Commerce Way,Paso Robles,CA U.S.A.93446 Ph.855-663-9876,Fax 805-238-5766 Date:3/12
In Canada I Zurn Industries Limited Document No.BF-720A
3544 Nashua Drive,Mississauga,Ontario L4V 1 L2 Ph.905-405-8272,Fax 905-405-1292 Product No.Model 720A
www.zurn.com Page 1 of 2
- w
Flow Characteristics O Rated Flow(established by approval agencies)
MODEL 720A 1/2",3/4",1", 1 1/4", 1 1/2"&2"(STANDARD&METRIC)
FLOW RATES(1/s)
0.63 1.26 1.89 2.52 3.2 3.8 2.52 5.0 7.6 10.1 12.6 n.
0 1
L 10 1I2"
N (15mm 3/4"(20mm 1 1 1/4"(32mm 1 1/2"(40mm 69
t� U)
O 1"(25mm) JO
w 5 5 2"(50mm) 35
U)
C0 C0
rn W
W
CL 0 0 10 20 30 40 50 60 0 40 80 120 160 200 a
CL
FLOW RATES(GPM)
Typical Installation Capacity thru Schedule 40 Pipe
Local codes shall govern installation requirements. Unless
otherwise specified,the assembly shall be mounted at a Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec
minimum of 12"(305mm)above the highest piping or outlet 1/8" 1 1 2 3
downstream of the device. Install with adequate drain and 1/4" 2 2 3 5
sufficient side clearance for testing and maintenance.The 3/8" 3 4 6 9
installation shall be made so that no part of the unit can be
submerged.A pressure vacuum breaker cannot be installed 1/2 5 7 9 14
where back-pressure could occur or where spillage of water 3/4" 8 12 17 25
from vent could cause damage. 1" 13 20 27 40
1 1/4" 23 35 47 70
1 1/2" 32 48 63 95
2" 1 52 1 78 105 167
'a
0
4 I
12"MIN.ABOVE -
HIGHEST OUTLET
I 12"MIN.ABOVE
HIGHEST PIPING
4
11 'I I
DIRECTION OF FLOW DIRECTION OF FLOW
OUTDOOR INSTALLATION INDOOR INSTALLATION
Specifications
The Pressure Vacuum Breaker shall be ASSE 1020 approved,and supplied with full port ball valves.The main body and bon-
net shall be bronze(ASTM B584),the loaded-air inlet shall use an silicone elastomer spring and seat disc.The entire assem-
bly shall be accessible for maintenance and testing without removing the device from the line.The Pressure Vacuum Breaker
shall be a WILKINS Model 720A.
Zurn Industries,LLC I Wilkins
1747 Commerce Way,Paso Robles,CA U.S.A.93446 Ph.855-663-9876,Fax 805-238-5766
In Canada I Zurn Industries Limited
3544 Nashua Drive,Mississauga,Ontario L4V 1L2 Ph.905-405-8272,Fax 905-405-1292
www.zurn.com Page 2 of 2