Submittal Sheet

a company
®
®
Model 350
Double Check Valve Assembly
WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:[phone] Fax:[phone]
In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:[phone] Fax:[phone]
Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com
DOCUMENT #: REVISION:
BF-350 11/12
SPECIFICATION SUBMITTAL SHEET
(Patent No. 5,913,331
Page 1 of 2
FEATURES
Sizes:  2 1/2"  3"  4"  6"  8" 10"  12"
Maximum working water pressure 175 PSI
Maximum working water temperature 140°F
Hydrostatic test pressure 350 PSI
End connections
(Grooved for steel pipe) AWWA C606
(Flanged) ANSI B16.1
Class 125
OPTIONS
(Sufxes can be combined)
 - with NRS shut-off valves (standard)
 FS - with cast iron wye type strainer
(anged only 2-1/2"-10")
 FSC - with epoxy coated wye type strainer
(anged only 2-1/2"-10")
 G - with groove end gate valves (2-1/2" - 10")
 GF - with grooved inlet gate connection and anged
outlet gate connection (2-1/2" - 10")
 FG - with anged inlet gate connection and grooved
outlet gate connection (2-1/2" - 10")
 L - less shut-off valves (anged body connections)
 OSY - with OS & Y gate valves
 PI - Post Indicator gate Valve (3"-12")
 DOM - with Clow gate valves, 51% Buy American Act Compliant
ACCESSORIES
 Repair kit (rubber only)
 Thermal expansion tank (Model XT)
 OS & Y Gate valve tamper switch (OSY-40)
 Test Cock Lock (Model TCL24)
APPLICATION
Designed for installation on potable water lines to protect against
both backsiphonage and backpressure of polluted water into the
potable water supply. The Model 350 shall provide protection
where a potential health hazard does not exist. Ideal for use where
lead-free* valves are required.
STANDARDS COMPLIANCE : (Sizes 2 1/2"-10" Horiz. & Vert.)
(Size 12" horizontal)
 ASSE® Listed 1015
 CSA® Certied
 IAPMO® Listed
 IAPMO® Listed - California Lead Plumbing Law*
 AWWA Compliant C510, and C550
 UL® Classied
 C-UL® Classied
 FM® Approved (2 1/2" - 10")
 Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of
Southern California
 NYC MEA 50-01-M (2 1/2" - 3")
 NYC MEA 297-98-M (4" - 6")
 NYC MEA 316-01-M (8" - 10")
 NSF® Listed-Standard 61, Annex G*
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
MATERIALS
Main valve body Ductile Iron ASTM A 536 Grade 4
Access covers Ductile Iron ASTM A 536 Grade 4
Coatings FDA Approved fusion epoxy nish
Internals Stainless steel, 300 Series
NORYL™, NSF Listed
Fasteners Stainless Steel, 300 Series
Seal ring EPDM (FDA approved)
O-ring Buna Nitrile (FDA approved)
Springs Stainless Steel, 300 Series
DIMENSIONS & WEIGHTS (do not include pkg.)
Attention: Model 350
(flange body) and
350A (grooved body)
have different lay
lengths.
SIZE
DIMENSION (approximate) WEIGHT
A
B LESS
GATE
VALVES
C D
E OS&Y
OPEN
E OS&Y
CLOSED
E NRS
GATE
F G
WITHOUT
GATES
VALVES
WITH NRS
GATE
VALVES
WITH OS&Y
GATE
VALVES
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kg lbs. kg lbs. kg
2 1/2 65 31 791 15 7/8 403 3 3/4 95 7 1/4 184 16 3/8 416 13 7/8 352 11 3/8 289 3 1/2 89 41 1/4 1048 53 24.1 155 70.4 163 74
3 80 32 816 15 7/8 403 3 3/4 95 7 1/4 184 18 7/8 479 15 5/8 397 12 3/8 314 3 1/2 89 42 3/4 1086 53 24.1 177 80.4 183 83
4 100 37 5/8 956 19 1/2 495 4 1/2 114 8 203 22 3/4 578 18 1/4 464 14 3/4 375 6 152 52 3/4 1340 91 41.3 271 123 281 127.6
6 150 44 3/4 1137 23 1/2 597 6 152 10 254 30 1/8 765 23 3/4 603 19 483 7 178 62 3/4 1594 165 74.9 449 203.8 465 211
8 200 60 3/4 1543 37 3/4 959 10 254 11 279 37 3/4 959 29 1/4 743 22 1/2 572 8 1/2 216 85 2159 358 162.5 810 367.7 834 378.6
10 250 63 3/4 1619 37 3/4 959 10 254 11 279 45 3/4 1162 35 3/8 899 26 1/2 673 8 1/2 216 93 1/4 2369 388 176.2 1148 521.2 1206 547.5
12 300 66 1/4 1683 38 965 10 254 12 305 53 1/8 1349 40 5/8 1032 30 762 9 229 n/a n/a 447 202.8 1493 677.2 1607 729
E
B
E
F
D
C
B
A
G
A
F
D
C
MODEL 350 OSYG SHOWN ABOVE