Read MAIN-INDEX-PAGE.psd text version

-

p e r t c a n Backflow Specialties

(800) 66-BKFLO (619) 527-2525 Fax: (619) 527-2527

www.americanhackflow.com

WILKINS w.

a company

Model 975 Reduced Pressure Principle 314" to 2"

APPLICATION

The WlLKlNS Model 975 Reduced Pressure Principle Backflow Preventer has been designed for installation in potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water line, making it most suitable for high hazard conditions. WlLKlNS low head loss makes the device most suitable where system pressures are low or where it is important to hold pressure loss to a minimum.

I

FEATURES

Bronze body construction - ASTM B584-78 All internal parts made from corrosion resistant materials Low head loss Spring loaded "Y" type center guided check valves All internal parts serviceable in-line Threaded inlet and outlet ANSI B2.1 Maximum working pressure - 175 PSI Temperature range - 33°F to 140°F High temperature option available 33°F to 210°F

OPTIONS

B -with full port resilient seated ball valves S - with bronze "Y" strainer U -with union connections L - without shut-off valves HT - high temperature service (33°F to 210°F)

STANDARDS

Tested and certified under the following standards for Reduced Pressure Principle Backflow Preventers: ASSE standard No. 1013, AWWA C-506, IAPMO (UPC), and CSA. Certification in process by FCCCHR at USC.

PRESSURE-TEMPERATURE

Suitable for supply pressure up to 175 PSI and water temperatures from 33°F to 140°F.High temperature option available, from 33°F to 210°F.

TYPICAL INSTALLATION

Instal! with minimum clearance of 12"from floor or grade. Install with adequate side clearance for testing and maintenance. Protect from freezing. Do not install in pit or vault.

I

I

L - 6 . PROTECTIVE

ENCLOSURE

c !

DIMENSIONS & WEIGHTS

DIMENSIONS(1NCHESJ

B

WEIQHT(LBS1 Wlth Gate Valves 1025 11 75 2092 2337 2966 Wlth Ball Va1r.s 1025 11 75 21 48 12311 3020

WATER . METER

SHUT OFF VALVE 7

'IZE

A A A Less Ball 011.3 DoubleUnlon Stop Valve. Valvm 8.IIVdvss Values 11718 7518 314 10112 NIA 1 11 118 13 7 718 NIA 17 14718 11 118 1 114 NIA 11121171121147181 NIA 111118 2 1185181153141 NIA Ill118

L e u Stop D E F C v.1~. 3114 5 2314 2 925 2 314 9 25 3 518 5 2 1750 5 6518 3318 2 lfi 1 5 1651813318121181 1787 1 5 1 8 5 l 8 1 3 3 1 8 1 2 1 1 8 1 2624

Neptune Richwell, SMR

1

1

1

FLOW CURVES

C?

MATERIALS

r

g 10

t

2

All corrosion resistant Cast bronze maincase Stainless steel springs Rubber check valve discs Stainless steel bolts Center guided check valves

n

1

215

2 a

$ 5

ot+i

o

20 40

t t 1 -L_l

60 80 100 120 140 n a n& ru s GPM)

u l a 23 11

1

972 12

1

I RELIEF VALVE SEAL RING

19

7 4 12

1

RELIEF VALVE S E A L E G

II

II

1 2

GATEVALV'APPED 552A-48 5526-48 952-300 952-11 952-14 952-12 952-30 972-33 553A-48 5538-48 952-300 9523 1 952-14 952-12 952-30 972-33 554A-48 5548-48 954-300 952-11 954-14 954-12 954-30 5754-33 555A-48 5558-48 954-300 952-1 1 954-14 954-12 954-30 5754-33

BALL VALVE, TAPPED GATEVALVE BALL VALVE . -POPEET 3.ASSY. RETAINING BOLT - 4 . SEAL 5 RING RETAINER 6 SEAL RING 7 rurrc~ 8 NO. 1 CHECK SPRING

!

------

556A-48 5568-48 954-300 952-11 954-14 954-12 954-30 5754-33

19 20 21 22 23 24

RELIEF VALVE DIAPHRAGM O-RING. RELIEF VALVE STEM RELIEF VALVE UPPER PLUNGER RELIEF VALVE STEM ASSY RELIEF VALVE COVE R BOLT NO 2 CHECK SPRIN(

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972-43 lllN 972-34 972-50 554-11A 952-33

972-43 lllN 972-34 972-50 554-l1A 952-33

974-43 121N 974-34 974-50 554-l1A 554-33

974-43 121N 974-34 974-50 554-l1A 554-33

974-43 121N 974-34 974-50 554-1 1A 554-33

American Backflow Specialties www.americanhackJrow.com

(800) 66-BKFLO (619) 527-2525 Fax: (619) 527-2527

FEATURES OPTIONS

pe"r"t"c'a'n Backflo w Specialties

k

(800) 66-BKFLO

(619) 527-2525

Fax: (619) 527-2527

www.americanhackflow.com

WILKINS w.

a company

Model 975 Reduced Pressure Principle 2-112" to 10"

STANDARDS COMPLIANCE ASSEB Listed 1013 IAPMOB Listed CSAB Certified ULB Classified MATERIALS

Maximum working water pressure Maximum working water temperature End connections flanged

175 psi 140" F ANSI B16.1 Class 125

C-ULB Classified FMBApproved AWWA Compliant C511 USC FCCC&HR

0 0 0 0 0 0 0 0

with NRS gate valves (standard)

G - with grooved by flanged NRS gate valves L - less shut-off valves OSY - with OS & Y gate valves OSYG - with grooved by flanged OS & Y gate valves

Main valve body Acess covers Coatings lnternals Elastomers Polymers Springs

FLOW CURVES

FS - with cast iron "Y" type flanged strainer FSC - with cast iron "Y" type flanged strainer, fusion epoxy coated, inside and out BMS - with integral battery-operated relief valve monitor switch with integral relief valve monitor switch

Cast iron, ASTM A 126 Class B Cast iron, ASTM A 126 Class B Fusion epoxy finish (FDA approved) Stainless steel, 300 Series Cast bronze, ASTM B 584 EPDM (FDA approved) Buna nitrile (FDA approved) Acetal (DelrinTM), NSFB Listed Stainless steel, 300 Series

ACCESSORIES 0 Repair kit (rubber only) 0 Air gap (Model AG) 0 Water thermal expansion tank (Model WXTP) APPLICATION Designed to protect potable water lines against backsiphonage and backpressure of contaminated water where a potential health hazard may exist.

TYPICAL INSTALLATION

Installation should follow local codes and the latest edition of the Uniform Plumbers Code. Install as shown below with adequate drain and sufficient side clearance for testing and maintenance. Device may not be submerged.

- - - - - - - - - - - - - - - - - - -

I PROTECTIVE , ENCLOSURE-

I

OS&Y

MODEL SIZE

OS8Y

NOGVs OPEN CLOSED B F G C D E E E NRS 4 1 1 0 1163181 137181 113181 8318 1 1 6 21/21 371181 22

A

1

1

H 47

1

NoGVs NRS

OS&Y

91 1 1 9 3 1 2 0 1

p

I -

GI

DIRECTION OF FLOW

Neptune Richwell. SMR

-

OUTDOOR INSTALLATION

CHECK ASSY

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23 24 25 26 27

NO.2POPPETASSEl\)8LY UPPER STEM GUIDE NIPPLE, LONG PLUG LIFTING LUG

957-300 957-2 558-21B 558-7 NIA

957-300 957-2 558-218 558-7 NIA

959-300 957-2

9510-300 9510-2

951 1-300 9511-2A

9512-300 9512-2A

CHECK ASSY (2 112" 3") SHOWN

-

558-21B - 5510-21B - 5510-218 - 5510-21B 558-7 NIA 5510-7 9510-24 5510-7 9510-24 5510-7 NIA

American Backflow Specialties www.americanbackflow.com

(800)66-BKFLO (619) 527-2525 Fax: (619) 527-2527

,

; a

-American Backjlow Specialties

(800) 66-BKFLO (619) 527-2525 Fax: (619) 527-2527

-

www.americanhackJlow.com

'MODEL 975

Relief Valve 2-112" to 10"

REPAIR KITS

REPAIR KITS, RUBBER RK212-975R 2-112 - 6 RK8-975R

WILKINS a

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company

1 1 1 I 1

5 7 10 11 13 19

1 DIAPHRAGM I 1 O-RING. SPRING RETAINER I I O-RING. STEM GUIDE 1 I O-RING. STEM I 1 SEAL RING 1

O-RING, COVER

1 1 1 1 1 1 1

1 I I I 1

5758-43 113N 230N 220N 5758-12 018N 033N 022N RK212-975 2-112" - 6"

1 I I 1 1

5758-43 113N 230N 327E 9711-12 018N 036N 022N RK8-975

1 I I 1 1

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O-RING, LARGE 20 21 O-RING, SMALL REPAIR KITS, COMPLETE

1

1 1

N/A 8

REPAIR KIT, RUBBER SPRING

1 1

RK212-975R 977A-33

RK8-975R 9711-33A

INDIVIDUAL PARTS

I RELIEF VALVE COMPLETE I 1 1 1

1 2 3

4

I

1 2 6 1 1 1 1 1

977-CU

I 1 1 1 1

9711-CU

I BLEED SCREW 1 BOLT. COVER 1 BOLT 1 WASHER. DIAPHRAGM

DIAPHRAGM SPRING RETAINER O-RING, SPRING RETAINER

1 1 I

1 1 1 1

552-11A 5752-11 554-11A 977-80 5758-43 977A-80-01OF 113N

552-11A 5752-11A 554-11A 977-80 5758-43 9711A-80-01OF 113N

5

6 7

1 1 1 I 1 1

8 9 10 11 12 13 14 15 16 17 18 19 20 21

1 SPRING 1 STEM GUIDE 1 O-RING, STEM GUIDE I O-RING. STEM 1 STEM 1 SEAL RING

SEAL RETAINER BOLT, SENSING BOLT, SEAT SEAT

I I I I I

1 1 1 1 1 1 1

1 1

1 1 I I 1 1

977A-33 977-2 230N 220N 977-5 5758-12 977-14 977-11 5752-11A 977-18 031N 018N 033N 022N 977-50

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9711-33A 9711-2 230N 327E 9711-5 9711-12 9711-14 977-11 NIA 9711-18 036N 018N 036N 022N 9711-50

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1 1 1 1 1

1 1 1 1 1

1 I O-RING, SEAT I O-RING. SENSING LINE 1 O-RING. LARGE I O-RING. SMALL

3 1 1

I RELIEF VALVE STEM ASSY. I

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WILKINS w.

a company

MODEL 975DA

FEATURES Maximum working water pressure Maximum working water temperature Hydrostatic test pressure End connections flanged OPTIONS

with OS & Y gate valves (standard) with grooved by flanged OS&Y gate valves less shut-off valves less water meter with remote reading meter with gpm meter (standard) with cu Wmin meter with relief valve monitor switch

Reduced Pressure Detector Assemblies 2-112" to 10"

175 PSI 140°F 350 PSI ANSI B16.1 Class 125

ACCESSORIES

0 0 0 Air gap (Model AG) Repair kit (rubber only) Thermal expansion tank (ModelWXTP) Gate valve tamper switch (OSY-40)

0

g

P

FLOW CHARACTERISTICS

20

MODEL 975DA 2 112"a3"

D S

15

10

g

" ,

g

5

0

200

400

FLOW RATES (GPM)

600

800

WEIGHTS (wlo packaging):

2 112" 111 Ibs. (wlo gate) 3" 111 Ibs. (wlo gate) 8" 857 Ibs. (wlo gate) 10" 1420 Ibs. (wlo gate) 221 Ibs. (w/os&y gate) 241 Ibs. (wlos&y gate) 1333 Ibs. (w/os&y gate) 2238 Ibs. (w/os&y gate)

"" C

qn

MODEL 975DA 8" 8 10"

g

15

lo

f

1000

2000

FLOW RATES (GPM)

3000

4000

ORated Flow (Establ~shed approval agencies) by

I I I

REPAIR KITS

RK212-975DA

RK34-950R RK212-950 1 1

For all other information, see Model 975

REPAIR KIT Model 975DA 2-112" & 3" Checks Only

Repair Kit for Model 9501975, 314" Repair Kit for Model 9501975, 2-112" & 3"

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B

REPAIR KIT RK212-975DAC Model 975DA 2-112" & 3" Checks & Relief Valves

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RK34-975R RK212-950 RK212-975R

1 1 1

Repair Kit for Model 975, 314" Repair Kit for Model 9501975, 2-112" & 3" Repair Kit for Model 975 Rel. Valve 2-112" & 3"

RK4-975DA

REPAIR KIT Model 975DA 4" Checks Only

RK4-975DAC

REPAIR KIT Model 975DA 4" Checks & Relief Valves

RK6-975DA

RK34-950R RK6-950

REPAIR KIT Model 975DA 6" Checks Onlv

RK6-975DAC

RK34-975R RK6-950 RK212-975R 1 1 1

REPAIR KIT Model 975DA 6" Checks & Relief Valves

Repair Kit for Model 975, 314" Repair Kit for Model 9501975, 6" Repair Kit for Model 975 Relief Valve, 6"

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1 1

I

I

Repair Kit for Model 9501975, 314" Repair Kit for Model 9501975, 6"

RK8-975DA

REPAIR KIT Model 975DA 8" Checks Onlv

RK8-975DAC

REPAIR KIT Model 975DA 8" Checks & Relief Valves

1 1 1 Repair Kit for Model 975, 314" Repair Kit for Model 9501975, 8" Repair Kit for Model 975 Relief Valve, 8"

RK34-950R RK8-950

I

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1 1

I

I

Repair Kit for Model 9501975, 314" Repair Kit for Model 9501975, 8"

RK34-975R RK8-950 RK8-975R

R K I 0-975DA

REPAIR KIT Model 975DA 10" Checks Onlv

R K I 0-975DAC

REPAIR KIT Model 975DA 10" Checks & Relief Valves

1 1 1 Repair Kit for Model 975, 314" Repair Kit for Model 9501975, 10" Reoair Kit for Model 975 Relief Valve. 10"

RK34-975R R K I 0-950 RK8-975R

Information

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