WILKINS 375DA SPEC.pdf
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- Attached to
- Installation Backflow Preventers
- Solicitation number
- W50S6M26QA012
About this file
This is a product specification and technical data sheet for the Zurn Industries Model 375DA Reduced Pressure Detector Assembly, a backflow prevention device designed for fire protection systems.
The Model 375DA is a reduced pressure detector backflow prevention assembly available in six sizes: 2½", 3", 4", 6", 8", and 10". The device protects potable water supplies against both backsiphonage and backpressure contamination and includes metered by-pass functionality to detect leaks and unauthorized water use. The assembly is rated for maximum working water pressure of 175 PSI and maximum temperature of 140°F, with a hydrostatic test pressure of 350 PSI. The main valve body and access covers are epoxy-coated ductile iron (ASTM A 536), with stainless steel internals (300 Series), NORYL™ seat rings and check valves, and EPDM elastomers. The device is certified to NSF/ANSI/CAN 61 (lead-free), ASSE® Listed 1047, UL® Classified, AWWA Compliant C550, CSA® Certified B64.4, FM® Approved, and approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California. Available options include configurations with OS & Y gate valves, grooved end gate valves, butterfly valves, Post Indicator Gate Valves, and various meter types (gpm or cubic feet/min). Accessories include air gap models, repair kits, thermal expansion tanks, tamper switches, and quick test fitting sets. Installation requirements specify mounting 12" to 30" above adequate drains with sufficient clearance for testing and maintenance, with the unit positioned so no part can be submerged.
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| RFI Questions Backflow Preventers.docx | DOCX document | |
| Solicitation - W50S6M26QA012 Professional Appearance.pdf | ||
| SOW Install Black Flow Prevention_.docx | DOCX document |
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Text version
Rev. P Date: 08/20 Document No. BF-375DA Product No. Model 375DA Patent zurn.com/patents
Model 375DA Reduced Pressure Detector Assembly
Zurn Industries, LLC | Wilkins 1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 In Canada | Zurn Industries Limited 7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216 www.zurn.com
E
F
C D
A B
G
E
F
C D
G B A
Relief Valve discharge port:
2 1/2” - 6” - 2.75 sq. in.
8” - 10” - 3.69 sq. in.
Attention:
Model 375DA (flange body) and Model 375ADA (grooved body) have different lay lengths.
Options (Suffixes can be combined)
| � | - | with OS & Y gate valves (standard) |
| � L | - | less shut-off valves (flanged body connections) |
| � LM | - | less water meter |
| � | - | with gpm meter (standard) |
| � CFM | - | with cu ft/min meter |
| � G | - | with groove end gate valves |
| � FG | - | with flanged inlet gate connection and |
| grooved outlet gate connection | ||
| � PI | - | with Post Indicator Gate Valve |
| � GF | - | with flanged inlet connection and grooved |
| outlet connection | ||
| � BG | - | with grooved end butterfly valves with integral |
monitor switches (2 1/2" - 10")
MODEL
375DA
SIZE
DIMENSION (approximate) WEIGHT
A
A
WITH
BUTTERFLY
VALVES
B
LESS
GATE
VALVES
C D
E
OS&Y
OPEN
E
OS&Y
CLOSED
E
WITH
BUTTERFLY
VALVES
F G
LESS
SHUT-
OFF
VALVES
OS&Y
GATE
VALVES
FLANGED
OS&Y
GATE
VALVES
GROOVED
BUTTERFLY
VALVES
GROOVED
in. mm 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 lbs. kg
2 1/2 65 31 787 28 711 15 7/8 403 7 1/4 184 9 229 17 3/4 451 15 3/8 391 13 3/4 349 9 1/2 241 8 3/8 213 75 34 185 84 167 76 147 67 3 80 32 813 28 1/2 724 15 7/8 403 7 1/4 184 9 229 20 1/4 514 17 432 13 3/4 349 9 1/2 241 8 3/8 213 78 35 208 94 160 73 130 59 4 100 37 5/8 956 32 8/9 835 19 1/2 495 8 203 9 229 22 1/2 572 18 1/4 464 17 432 11 279 9 1/4 235 116 53 306 139 292 132 200 91
6 150 44 5/8 1133 37 5/8 956 23 1/2 597 10 254 10 1/2 267 30 1/2 775 24 1/4 616 17 1/2 445 12 3/8 314 9 1/4 235 194 88 494 224 468 212 312 142
8 200 60 7/8 1546 53 7/8 1369 37 3/4 959 11 279 15 1/2 394 37 940 28 1/2 724 16 15/16 430 15 3/8 391 16 3/4 426 382 173 858 389 810 367 556 252 10 250 63 7/8 1622 57 7/8 1470 37 3/4 959 11 279 15 1/2 394 45 5/8 1159 34 3/4 883 16 15/16 430 15 3/8 391 16 3/4 426 412 187 1230 558 1164 528 800 363
Model 375DAG SHOWN BELOW
Application Designed for installation on water lines in fire protection systems to protect against both backsiphonage and back-pressure of contaminated water into the potable water supply.
The Model 375DA shall provide protection where a potential health hazard exists. Incorporates metered by-pass to detect leaks and unauthorized water use.
Standards Compliance (Unless otherwise noted, applies to sizes 2 1/2” thru 10”)
| • | ASSE® Listed 1047 |
| • | UL® Classified |
| • | AWWA Compliant C550 |
| • | CSA® Certified B64.4 (4” & 6”) |
| • | C-UL® Classified |
| • | FM® Approved |
| • | NYC MEA 218-01-M VOL 3 |
| • | Approved by the Foundation for Cross Connection |
| Control and Hydraulic Research at the University of | |
| Southern California | |
| • | Meets the requirements of NSF/ANSI/CAN 61* |
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
By-Pass Backflow Assembly 3/4" Model 975XLD
Materials
| Main valve body | Ductile Iron ASTM A 536 | |
| Access covers | Ductile Iron ASTM A 536 | |
| Coatings | NSF Approved fusion epoxy finish | |
| Internals | Stainless steel, 300 Series | |
| NORYL™ | ||
| Fasteners | Stainless Steel, 300 Series | |
| Elastomers | EPDM (FDA approved) | |
| Buna Nitrile (FDA approved) | ||
| Polymers | NORYL™ | |
| Springs | Stainless steel, 300 series | |
| Sensing line | Stainless steel, braided hose |
Features
| Sizes: | 2 1/2”, 3”, 4”, 6”, 8”, 10” | |||
| 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 bolt pattern) | ASME B16.42 | |||
| Class 150 |
Dimensions & Weights (do not include pkg.)
Accessories
| � Air gap (Model AG) |
| � Repair kit (rubber only) |
| � Thermal expansion tank (Model XT) |
| � OS & Y Gate valve tamper switch (OSY-40) |
| � QT-SET Quick Test Fitting Set |
NSF/ANSI/CAN 61
Rated Flow (established by approval agencies)Flow Characteristics
Zurn Industries, LLC | Wilkins 1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 In Canada | Zurn Industries Limited 7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216 www.zurn.com
0.0 63.1 126.2 189.3 252.4
0 1000 2000 3000 4000 PR
ES
SU
R
E
LO
SS
(k
Pa
FLOW RATES (l/s)
PR
ES
SU
R
E
LO
SS
(P
SI
G
FLOW RATES (GPM)
MODEL 375DA 6", 8" & 10" (STANDARD & METRIC)
Specifications The Reduced Pressure Detector Backflow Prevention Assembly shall be certified to NSF/ANSI/CAN 61, ASSE® Listed 1047, and supplied with full port OS & Y gate valves. The main body and access cover shall be epoxy coated ductile iron (ASTM A 536), the seat ring and check valve shall be NORYL™, the stem shall be stainless steel (ASTM A 276) and the seat disc elas-tomers shall be EPDM. The checks and the relief valve shall be accessible for maintenance without removing the device from the line. The Reduced Pressure Detector Backflow Prevention Assembly shall be a ZURN WILKINS Model 375DA.
0.0 12.6 25.2 37.9 50.5
0 200 400 600 800 PR
ES
SU
R
E
LO
SS
(k
Pa
FLOW RATES (l/s)
PR
ES
SU
R E
LO
SS
(P
SI
G
FLOW RATES (GPM)
MODEL 375DA 2 1/2", 3" & 4" (STANDARD & METRIC)
12" MIN.
30" MAX.
PROTECTIVE
ENCLOSURE
DIRECTION OF FLOW
Typical Installation Local codes shall govern installation requirements. To be installed in accordance with the manufacturer’s instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall be mounted at a mini-mum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged.
OUTDOOR INSTALLATION
Capacity thru Schedule 40 Pipe (GPM)
Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec
2 1/2" 75 112 149 224
3" 115 173 230 346
4" 198 298 397 595
6" 450 675 900 1351
8" 780 1169 1559 2339
10" 1229 1843 2458 3687
12" 1763 2644 3525 5288
10" (250mm)8" (200mm)
6" (150mm)
2 1/2" (65mm) 3" (80mm)
4" (100mm)
INDOOR INSTALLATION
12" MIN.
30" MAX.
AIR GAP
DRAIN
DIRECTION OF FLOW
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