background image

Size (in)

3

4

6

8

10

12

16

20 & 24

P/N

0677-02

0677-04

0677-05

0677-06

0677-07

0677-08

0677-09

0677-11

8.  Replace Seat Disc, Diaphragm and Spacer Washers provided in Main Valve repair kit (refer to Table 2 or 3 for correct repair kit part 

number). Re-assemble in the reverse order of disassembly.

9.    

 

Re-Install Disc and Diaphragm Assembly in the valve, taking care not to damage the lower guide area in the center of the valve    

  seat.

10.  Re-install Cover Spring. Replace Valve Cover and tighten Cover Nuts in a crossing pattern to ensure even distribution. Test the Disc 

and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section.

11.  Test the integrity of the Seat Seal by following the Seat Seal Test procedure in previous section.
12.  Return valve to service by following instructions on the Technical Bulletin matching the valve function.

Size (in)

1

 

1/4

1

 

1/2

2

2

 

1/2

10 

12 

14 

16 

P/N

0677-01

0677-01

0677-02

0677-03

0677-04

0677-05

0677-06

0677-07

0677-08

0677-09

0677-10

0677-11

Table 3: Reduced Port Valve (605GD/605AD) Repair Kits

Table 2: Full Port Valve (905GD/905AD) Repair Kits

8          IOM-A-ACV-972-19_672-19   2115 

EDP# 1917110 

© 2021 Watts

IOM-A-ACV-972-19_672-19   2115 

EDP# 1917110 

© 2021 Watts         9

Summary of Contents for 672GD-19

Page 1: ...oat Control Valve 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica tions to the information pro...

Page 2: ...facing up main valve stem vertical Slow operation or premature stem and guide wear may occur if valve is not installed according to factory recommendations Consult factory for detailed engineering re...

Page 3: ...in 10 10 12 14 14 16 24 26 28 30 34 40 Counterclockwise to OPEN bleed valve STEP 1 To ensure proper operation any trapped air will need to be bled off the valve cover during startup The ACV includes...

Page 4: ...ng Speed Flow Control allows free flow into the cover and restricted flow out of the cover of the main valve If valve opening is too slow turn the adjustment screw OUT counterclockwise See Figure 3B i...

Page 5: ...specification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace diaphragm...

Page 6: ...1 2 turns open from full closed position Can be adjusted in field Main Valve will not close Closed isolation valves in pilot system Check isolation valves ensure open Diaphragm is damaged Conduct diap...

Page 7: ...move cover nuts and washers 3 Remove the cover If cover is not free to be removed loosen it by tapping upward along its outside edge with a dull cold chisel pic tured above a Large valves may require...

Page 8: ...rush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Inspect valve seat If seat is not damaged removal is not necessary Valve seats 6 and smaller are thread...

Page 9: ...uts in a crossing pattern to ensure even distribution Test the Disc and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integri...

Page 10: ...el 10 Diaphragm Washer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 11 Diaphragm Buna N Nitrile 12 Disc Retainer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 13 Seat Disc Buna N Nitrile 14 Spacer Wash...

Page 11: ...IOM A ACV 972 19_672 19 2115 EDP 1917110 2021 Watts 11 NOTES...

Page 12: ...resulting from labor charges delays vandalism negligence fouling caused by foreign material damage from adverse water conditions chemical or any other circumstances over which the Company has no cont...

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