ZURN 350 Double Check Valve Assembly Instructions

June 13, 2024
ZURN

ZURN 350 Double Check Valve Assembly Instructions
ZURN 350 Double Check Valve

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® Certified B64.5
  • cUPC® Listed
  • AWWA Compliant C510, and C550
  • UL® Classified
  • C-UL® Classified
  • 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″)
  • Meets the requirements of NSF/ANSI/CAN 61*
  • (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

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
Seal ring: EPDM (FDA approved)
O-ring: Buna Nitrile (FDA approved)
Springs: Stainless Steel, 300 Series

Features

Sizes: 2 1/2″, 3″, 4″, 6″ , 8″, 10″ , 12″
Maximum working water pressure : 175 PSI
Maximum working water temperatur: e 140°F
Hydrostatic test pressure: 350 PSI
End connections
(Grooved for steel pipe): AWWA C606
(Flanged): ANSI B16.42
Class 150

Options (Suffixes can be combined)

  • with NRS shut-off valves (standard)
  • FSC – with epoxy coated wye type strainer (flanged only 2-1/2″-10″)
  • G – with groove end gate valves (2-1/2″ – 10″)
  • GF – with grooved inlet connection and flanged outlet connection (2-1/2″ – 10″)
  • FG – with flanged inlet connection and grooved outlet connection (2-1/2″ – 10″)
  • L – less shut-off valves (flanged body connec tions)
  • OSY – with OS & Y gate valves
  • PI – Post Indicator gate valve
  • BG – with grooved end butterfly valves with integral supervisory switches (2-1/2″ – 10″)

New Connected Products. Search ZCSM-PF on Zurn.com for details.

Accessories

  • Connected Pressure Monitor (Model ZCSM-PF)*
  • Connected Flow Meter Option (Model ZCSM-BTM must be ordered with Model ZCSM-PF)*
  • Repair kit (rubber only)
  • Thermal expansion tank (Model XT)
  • OS & Y Gate valve tamper switch (OSY-40)

Attention: Model 350 (flange body) and 350A (grooved body) have different lay lengths.

Dimensions & Weights (do not include pkg.)

Dimensions

MODEL 350 SIZE DIMENSION (approximate) WEIGHT
A A WITHBUTTERFLYVALVES B LESS GATE VALVES
CLOSED E NRS GATE E WITHBUTTERFLYVALVES
VALVES FLANGED NRS GATE VALVES GROOVED OSY GATE VALVES FLANGED
VALVES GROOVED BUTTERFLY VALVES GROOVED
in. mm in.
mm in. mm
kg lbs. kg
2 1/2 65 31
15 3/8 391 11 1/2
70 137 62
3 80 32
17 432 12 3/4
147 67 183
4 100 37 5/8
572 18 1/4 464
253 115 281
6 150 44 5/8
24 1/4 616 18
421 191 465
8 200 60 7/8
1/2 724 21 1/8
352 834 378
10 250 63 7/8
1159 34 3/4 883
1148 521 1082
12 300 66 3/16
1029 28 711
1607 729 n/a
Zurn Industries, LLC ** Wilkins** 1747 Commerce Way, Paso Robles, CA

U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766In Canada | Zurn Industries Limited 7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216 www.zurn.com| Rev. N Date: 12/22Document No. BF-350 Product No. Model 350 Patent zurn.com/patentsPage 1 of 2

Flow Characteristics

MODEL 350 2 1/2″, 3″ & 4″ (STANDARD & METRIC)
Flow Characteristics

MODEL 350 6″ & 8″ (STANDARD & METRIC)
Flow Characteristics

MODEL 350 10″ & 12″ (STANDARD & METRIC)

Flow Characteristics

Typical Installation

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum 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.

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

OUTDOOR INSTALLATION

OUTDOOR INSTALLATION

INDOOR INSTALLATION

(350OSY with ZCSM-PF Connected Pressure Monitor and ZCSM-BTM Connected Flow Meter accessories)INDOOR INSTALLATION

VERTICAL INSTALLATION (350OSYG)

![VERTICAL INSTALLATION

(350OSYG)](https://manuals.plus/wp- content/uploads/2023/10/Screenshot_8-534.png)

Specifications

The Double Check Backflow Prevention Assembly shall be certified to NSF/ANSI/CAN 61, ASSE® Listed 1015, and supplied with full port 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 elastomers shall be EPDM. The checks shall be accessible for maintenance without removing the device from the line. The Double Check Backflow Prevention Assembly shall be a ZURN WILKINS Model 350.

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

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References

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