Model 70DU SPECIFICATION SUBMITTAL SHEET

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SC - sealed cage bell housing. ❑. P - main cap tapped and plugged for gauge. Sizes: ❑ 1¼" ❑ 1½" ❑ 2". Maximum working water pressure. 300 psi. Maximum ...

Model 70DU

a

Water Pressure Reducing Valve with Double Union Connections, Integral By-pass Check Valve and Strainer

company

SPECIFICATION SUBMITTAL SHEET

FEATURES Sizes: ‰ 1¼"

‰ 1½"

APPLICATION Designed for installation on potable water lines to reduce high inlet pressure to a lower outlet pressure. The double female union connections makes this device most suitable for applications with minimal clearance and installations requiring frequent off-site maintenance. The direct acting integral by-pass design prevents buildup of excessive system pressure caused by thermal expansion. The balanced piston design enables the regulator to react in a smooth and responsive manner to changes in system flow demand, while at the same time, providing protection from inlet pressure changes.

‰ 2"

Maximum working water pressure Maximum working water temperature Reduced pressure range Factory preset Hydrostatic test pressure End connectionsThreaded

300 psi 180°F 25 psi to 75 psi 50 psi 300 psi ANSI B1.20.1

OPTIONS (Suffixes can be combined) ‰ - standard with 20 mesh strainer screen ‰ C - female copper sweat ‰ HR - 75 psi to 125 psi adjustment range, factory set at 85 psi ‰ SC - sealed cage bell housing ‰ P - main cap tapped and plugged for gauge

STANDARDS COMPLIANCE

y y y

CSA® Certified City of Los Angeles Approved IAPMO® Listed

MATERIALS Main valve body Seat Fasteners Stem & plunger Elastomers Strainer screen

Cast Bronze ASTM B 584 300 Series Stainless Steel 300 Series Stainless Steel Brass ASTM B 16 Cast Bronze ASTM B 584 Buna Nitrile, FDA (CFR) 21, 177.2600 EPDM, FDA (CFR) 21, 177.2600 300 Series Stainless Steel D

ACCESSORIES ‰ Repair kit ‰ Water thermal expansion tank (Model WXTP) ‰ Special in-line spacer nipple (1 ¼” only) ‰ In-line strainer screen for DUSPC (SCR) ‰ Water hammer arrester (Model 1250) ‰ Tailpiece kit (TPK)

B WILKINS 70DU

C

A

DIMENSIONS & WEIGHTS (do not include pkg.) SIZE in. 1 1/4 1 1/2 2

mm 32 40 50

CONNECTIONS in. DOUBLE UNION 8 3/8 DOUBLE UNION 10 DOUBLE UNION 12 1/4

A mm 213 254 311

DIMENSIONS B in. mm 8 203 10 254 11 279

(approximate) C in. mm 1 3/4 45 2 1/4 57 2 3/8 60

WEIGHT

D in. 3 15/16 5 1/4 6 1/2

mm 100 133 165

DOCUMENT #: REG-70DU

Page 1 of 2

lbs. 8 15 21

kg. 3.5 7.0 9.5 REVISION: 3/05

FLOW CHARACTERISTICS MODEL 70DU 1 1/4" THRU 2" (STANDARD & METRIC) FLOW RATES (l/s)

FALL OFF (PSIG)

3.8 1 1/4" (32mm)

5.0

6.3 2" (50mm)

1 1/2" (40mm)

7.6 138

15

104

10

69

5

35

0

0

40

20

60

80

100

FALL OFF (kpa)

1.3

20

2.5

120

FLOW RATES (GPM)

TYPICAL INSTALLATION Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance with the latest edition of the Uniform Plumbing Code. The Model 70DU may be installed in any position. If installed in a pit, vault or indoor application, specify the "SC" sealed cage option. Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1 (i.e.: 200 psi inlet reduced to 50 psi outlet). CAUTION: Anytime a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting. Do not bottom adjustment bolt on bell housing.

MODEL 975XL BACKFLOW PREVENTER

PROTECTIVE ENCLOSURE

GAUGE

SHUT-OFF

12" MIN. 30" MAX.

DIRECTION OF FLOW

TYPICAL OUTDOOR INSTALLATION

GAUGE

DIRECTION OF FLOW

INDOOR INSTALLATION

SPECIFICATIONS The Pressure Reducing Valve shall be the direct-acting type. The integral bypass check valve’s main body and bell housing shall be cast bronze (ASTM B 584). The pressure reducing valve shall be of the balanced piston design, include an integral strainer screen and shall reduce pressure in both flow and no-flow conditions using an adjusting bolt. The bronze bell housing shall be threaded to the body and shall not require the use of ferrous screws. The Pressure Reducing Valve shall be a WILKINS Model 70DU.

Page 2 of 2 WILKINS OPERATION OF ZURN INDUSTRIES, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805/238-7100 Fax:805/238-5766 IN CANADA: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905/405-8272 Fax:905/405-1292 Product Support Help Line: 1-877-BACKFLOW (1-877-222-5356) · Website: http://www.zurn.com

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