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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.

Improperly configured opening speed 
control. 

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/re-
pair seat if required.

Improperly configured closing speed 
control.

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

Standard setting for 
closing speed control is 
11/2 - 21/2 turns open from 
full closed position. Can 
be adjusted in field.

Troubleshooting Guide

 

6          IOM-A-ACV-960-17_660-17   2115 

EDP# 1917058 

© 2021 Watts

IOM-A-ACV-960-17_660-17   2115 

EDP# 1917058 

© 2021 Watts         7

Summary of Contents for AMES 960GD-17

Page 1: ...tude Controls 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 provide...

Page 2: ...2 1 Accelerator Control 3 Altitude Control 4 Check Valve 5 Adjustable Opening Speed 6 Adjustable Closing Speed 7 3 Way Ball Valve P Position Indicator X Isolation Cocks 1 Prior to installation flush l...

Page 3: ...wly open the valve See Figure 1 STEP 3 Pressure the line by opening the upstream isolation valve slowly Air is vented through the air bleed valve Tighten the fitting when liquid begins to vent See Fig...

Page 4: ...he downstream isolation valve STEP 5 If the valve remains closed as indicated by the stem position in the position indicator See Figure 2 and the tank level is known to be below the desired level SLOW...

Page 5: ...ates fluid pressure into the main valve cover chamber controlling the valve closing speed If the downstream pressure fluctuates slightly above the desired setpoint turn the adjustment screw OUT counte...

Page 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...

Page 7: ...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 diaph...

Page 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...

Page 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...

Page 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...

Page 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...

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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