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Issue

Possible Cause

Corrective Action

Notes

Main Valve will not 
open

Closed isolation valves in pilot system.

Check isolation valves, ensure 
open. 

Insufficient supply pressure.

Check upstream pressure.

Depending on water 
source, supply pressure 
may not be controlled by 
valve operator.

Main valve stem assembly corroded/
damaged.

Inspect stem assembly, clean/
replace if necessary.

Blockage in pilot system.

Inspect & clean any installed 
pilot system strainers, check 
orifice/speed controls for 
blockages.

Missing fixed orifice assembly.

Verify installation of orifice; 
replace if required/missing. 

Pilot valve inlet isolation 
valve can be used as a 
makeshift orifice assembly 
by partially opening from 
full closed position. 

Improperly configured opening speed 
control (if equipped). 

Adjust opening speed control 
to verify functionality, adjust as 
required.

Standard setting for  
opening speed control is 
11/2 - 21/2 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 diaphragm seal test, 
repair and replace if necessary. 

Main valve stem assembly corroded/
damaged.

Inspect stem assembly, clean/
replace if necessary.

Blockage in main valve.

Perform freedom of movement  
test; if valve does not close,  
disassemble and remove  
blockage.

Worn/damaged valve seat. 

Perform seat sealing check; 
disassemble and inspect/repair 
seat if required.

Troubleshooting Guide

 

6          IOM-A-ACV-912-11_612-11   2115 

EDP# 1917038 

© 2021 Watts

IOM-A-ACV-912-11_612-11   2115 

EDP# 1917038 

© 2021 Watts         7

Содержание Ames 912GD-11

Страница 1: ...tion 2 Setting the Pressure Reducing Control 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica t...

Страница 2: ...valves ensure valve disc does not contact the main valve 6 Provide adequate clearance for valve servicing and maintenance Refer to valve servicing dimensions on next page 7 Avoid installing valves 6...

Страница 3: ...4 16 24 26 28 30 34 40 48 48 Size in 11 4 11 2 2 21 2 3 4 6 8 10 12 14 16 C in 16 16 20 22 22 24 32 34 38 44 48 52 D in 10 10 12 14 14 16 24 26 28 30 34 40 STEP 2 To ensure proper operation any trappe...

Страница 4: ...pressure set point by turning the adjustment screw OUT counterclockwise until downstream pressure decreases to the desired setpoint See Figure 3 STEP 6 Adjust the Surge Control by turning the adjustm...

Страница 5: ...ise increasing the rate of closing Setting the Pressure Sustaining Control Step 1 Setting The Relief Sustaining Control requires lowering the upstream pressure to the desired minimum sustained pressur...

Страница 6: ...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...

Страница 7: ...ly by partially opening from full closed position Improperly configured opening speed control if equipped Adjust opening speed control to verify functionality adjust as required Standard setting for o...

Страница 8: ...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...

Страница 9: ...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...

Страница 10: ...ts 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 integrit...

Страница 11: ...el 9 Stem Washer ASTM A276 304 Stainless Steel 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 Iro...

Страница 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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