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  item DeSCription 

Style  Size 

2

1

⁄

2

" & 3" (65 – 80mm) 

4" (100mm) 

6" (150mm) 

8" (200mm)  

10" (250mm)

  DISC ASSEMBLY 

ALL  Part #  

905152  

905153  

905154  

905155  

400145

  Items 6, 16, 17 (10", Item 6 only)

  SINGLE SPRING MODULE  

870,   Part #  

905142  

905143  

905144  

905145  

905146

  Items 5.1, 7, 8, 9, 9.1,  

870V

  10, 11, 12, 12.1 

876 

Part #  

905147  

905148  

905149  

905150  

905151

   

876V

  CHECK REPLACEMENT KIT 

870,  Part # 

905528  

905534  

905537  

905539  

905540

  Items 2.1, and 3 - 17  

870V

   

876,   Part #  

905530  

905536  

905538  

905541  

905542

   

876V

  SEAT RING / ARM ASSEMBLY 

ALL   Part #  

905157  

905158  

905159  

905160  

905161

  Items 3, 3.1, 3.2, 3.4, 4, 4.1, 4.2, 5

  RUBBER PARTS KIT  

ALL   Part #  

905162  

905163  

905164  

905165  

905166

  Items 2.1, 3.1, 6, 15, 26, 35, 35.1, 45, 45.1

  COVER ASSEMBLY (Inlet Check)*  

ALL   Part #  

905167  

905168  

905169 

 905170  

905171

  Items 2, 2.1, 15

  COVER ASSEMBLY (Outlet Check)*  

ALL   Part # 

 905244  

905245  

905246  

905247 

905248

  Items 2, 2.1, 15

  BULKHEAD FITTING FOR COVER*  

870,   Part #  

905275 

905277

  Items 43.1, 45.1, 46.1, 47.1  

870V

   

876,   Part # 

905275 

905277

   

876V

  BULKHEAD FITTING FOR BODY*  

870,   Part #  

905276 

 905277

  Items 43, 45, 46, 47  

870V

   

876,   Part #  

905277

   

876V

* Bulkhead fittings are not furnished on late models . Very early productions may require a different bulkhead fitting . Consult your FEBCO 

representative for assistance .

8

MAINTENANCE MANUAL SERIES 850, 856, 870V & 876V 2

1

⁄

2

"- 10" (65 – 250mm)

Repair Parts 870, 870V / 876, 876V

2

1

⁄

2

" – 10" (65 – 250mm) Double Check / Double Check Detector Assemblies

First Check

test Cock 

#3

test 

Cock 

#1

test 

Cock 

#2

Second Check

#2 outlet Shutoff Valve

#1 inlet Shutoff Valve

test Cock 

#4

Содержание 856

Страница 1: ...ing this equipment Table of Contents Features and Operating Procedures 2 How to Order Parts 2 Trouble Shooting Guide 3 Vandalism 3 Testing 3 Freeze Protection Procedures 4 General Service Procedures 4...

Страница 2: ...led in the vertical orientation must include vertical support under the second check body section Double Check Detector Assemblies Bypass Operation All low flow demands up to a minimum of three GPM ar...

Страница 3: ...rrectly The assembly should be tested at time of ini tial installation after servicing or maintenance and at least annually there after Acceptable test procedures are published by Foundation for Cross...

Страница 4: ...check module until all water inside valve drains back out through inlet drain 7 If you blowout the piping downstream of the backflow assembly using compressed air Connect the air supply to the outlet...

Страница 5: ...g to help hold O ring in place during reassembly Series 870V and 876V Apply a thin coating of the lubricant supplied in the repair kit to the O ring groove in the 2 check body and position the O ring...

Страница 6: ...eck disc stem threads Lift the arm and remove the check disc Item 6 Inspect sealing surface for debris or damage Replace check disc if necessary NOTE When jam nut Item 16 is tight check disc is design...

Страница 7: ...7 905158 905159 905160 Items 3 3 1 3 2 3 4 4 4 1 4 2 5 RUBBER PARTS KIT ALL Part 905249 905163 905164 905165 Items 2 1 3 1 6 15 26 35 35 1 45 45 1 COVER ASSEMBLY With Bulkhead Part 905167 905168 90516...

Страница 8: ...26 35 35 1 45 45 1 COVER ASSEMBLY Inlet Check ALL Part 905167 905168 905169 905170 905171 Items 2 2 1 15 COVER ASSEMBLY Outlet Check ALL Part 905244 905245 905246 905247 905248 Items 2 2 1 15 BULKHEA...

Страница 9: ...ammer or other causes of excessive water pressure Seat discs damaged in such a manner should be replaced and not turned over to be reused 3 Check Seat Ring Replacement a The seat rings are threaded in...

Страница 10: ...Nitrile 11 Washer Stainless Steel 12 Screw Stainless Steel 13 Spring Stainless Steel 30 Test Cock Bronze 35 Seat Ring Bronze 36 O ring Buna N 40 Ball Valve Bronze 40 1 Ball Valve Bronze 40 2 Ball Val...

Страница 11: ...ead loss Cast ductile iron bodies for lighter weight Lowest installed cost Saves on labor and material Choice of cost saving N Shape designs revolutionary vertical designs or conventional in line desi...

Страница 12: ...e sole and exclusive remedy for breach of warranty and the Company shall not be responsible for any incidental special or consequential damages including without limitation lost profits or the cost of...

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