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ES-A-ACV-LF985GD  2115

 

16

 

To ensure peak performance and longevity of your automatic con-

trol valve, Watts/Ames recommends following the below  

standard maintenance schedule.  
• 

Monthly Maintenance

– Visual inspection of valve(s) for leaks
– Inspect for proper operation(s); exercise valve.

• 

Quarterly Maintenance

– Conduct monthly inspection.
– Validate/Re-establish necessary setpoints of controls/pilots. 

• 

Annual Maintenance

– Conduct monthly & quarterly inspections.
– Inspect & clean all strainers.  
– Inspect valve coating, touch up as required.

• 

3-5 Year Maintenance

– Conduct monthly, quarterly, & annual maintenance.
–  Inspect & replace valve elastomers (diaphragm, O-rings, 

valve/pilot seats)

– Re-establish necessary set points of controls/pilots.

Automatic Control Valve Maintenance Schedule

 

Troubleshooting Guide

 

Warning: 

The valve cannot be serviced under pressure.  

Upstream and downstream Isolation Valves must be installed 

to protect system piping. Accurate diagnosis and trouble-

shooting requires the valve to open fully, and may subject 

downstream piping and equipment to high pressure and/or 

flow rates. The downstream Isolation Valve should be kept 

closed while diagnosing the valve.

Extreme caution should be used while performing the 

troubleshooting techniques listed below.

WARNING

!

Recommended tools for diagnosis: (3) PRESSURE GAUGES, 

installed to monitor the inlet pressure, outlet pressure, and cover 

chamber pressure. If included, a POSITION INDICATOR should 

be installed to visually assess the position of the disc &  

diaphragm assembly.

 Test 1: Diaphragm Seal Test

1.  Close upstream & downstream isolation valves. Close pilot 

isolation valves or remove pilot control tubing to isolate valve 

cover from incoming fluid & pressure. Remove uppermost 

cover plug, test cock, or limit switch.

2.  With the valve cover chamber vented to atmosphere,  

partially open the upstream isolation valve, allowing incoming 

pressure to lift the disc & diaphragm assembly. A volume of 

water will be displaced from the cover chamber as the valve 

opens; consult valve 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 or tighten 

disc & diaphragm assembly.

Test 2: Seat Seal Test

1.  Close downstream isolation valve and install pressure gauges 

on an open inlet and outlet port of main valve.  

2.  Open upstream isolation valve to allow pressure on to the valve 

cover. Allow valve to fully close.

3.  Monitor downstream pressure gauge; reading should hold 

steady below incoming pressure. If pressure on downstream 

side rises to match upstream pressure, leakage is occurring 

through the seat of the main valve. Disassemble valve, inspect 

and repair/replace any required parts.
a.  If gauge pressure rises to match outlet pressure (down-

stream of closed isolation valve) yet remains below inlet 

pressure, the isolation valve may be leaking as opposed to 

main valve seat.

Test 3:  Freedom of Movement/Valve  

Travel Test

1.  Close upstream and downstream isolation valves. Install valve 

position indicator.  

2.  Partially open upstream isolation valve and allow cover to fill 

with fluid & pressure, closing the valve fully. Mark the position 

indicator’s full closed position.

3.  Isolate cover chamber from receiving fluid and pressure by 

closing isolation valves or removing control tubing.  

4.  Carefully vent cover chamber to atmosphere by opening test 

cock or removing a cover plug. Observe the valve position 

indicator as the valve travels to the full-open position. The disc 

& diaphragm assembly should move freely from fully closed to 

fully open position without binding or “grabbing” at any point 

during its movement.

a.  The disc & diaphragm assembly may momentarily “hesi-

tate” while travelling from fully closed to fully open position 

– this is a normal characteristic of diaphragm operated 

control valves, and does not indicate mechanical binding or 

improper valve operation.

b.  A continuous discharge of water from the cover chamber 

after venting to atmosphere indicates leakage past the 

diaphragm.

5.  If necessary, disassemble valve and inspect/repair disc & dia-

phragm assembly.

© 2021 Watts

Installation, Operation and Maintenance - Series LF985GD 

Содержание AMES LF685GD Series

Страница 1: ...cal codes and ordinances WARNING Need for Periodic Inspection Maintenance This product must be tested periodically in compliance with local codes but at least once per year or more as service conditions warrant All products must be retested once maintenance has been performed Corrosive water conditions and or unauthorized adjustments or repair could render the product ineffective for the service i...

Страница 2: ...he pump starts and stops against an open valve Pump start up When the pump is signaled to start the 4 Way Solenoid is energized and directs fluid and pressure into the cover chamber above the diaphragm and relieves fluid and pressure from the power chamber below the diaphragm The fluid and pressure relieved from the cover chamber is vented to atmo sphere or available floor drain The valve closes a...

Страница 3: ...bly This assembly is the only moving part within the valve allowing it to open or close as commanded by the pilot control system When pressure is applied to the upper diaphragm chamber and released from the lower diaphragm chamber the valve travels to a closed position When pressure is applied to the lower diaphragm chamber and released from the upper diaphragm chamber the valve travels to a full ...

Страница 4: ...sure Drop psi 2 3 4 6 8 10 20 30 40 60 80 100 Flow Rate Gallons per minute Water 2 4 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000 100000 8 6 1 4 1 6 1 2 1 0 8 6 4 3 2 1 2 2 1 2 1 0 8 6 4 3 2 1 2 2 Angle Globe C V Suggested Maximum continuous flow based on velocity of 20 ft per second Maximum intermittent flow based on velocity of 25 ft per second Minimum flow rates based on a 20 40 psi pr...

Страница 5: ...le Iron 11 Diaphragm Buna N Nitrile 12 Inner Bearing Bolts 3 and Smaller ASTM A276 304 Stainless Steel 13 Inner Bearing Retainer 3 and Smaller ASTM A276 302 Stainless Steel 13A Bearing Retaining Ring 4 and Larger ASTM A276 302 Stainless Steel 14 Inner Bearing ASTM A276 304 Stainless Steel 15 O ring Buna N Nitrile 16 O ring Buna N Nitrile 17 Stem ASTM A276 304 Stainless Steel 18 Disc Retainer ASTM ...

Страница 6: ...enter Angle Thread Angle 150 Angle 300 Angle Thread Angle 150 Angle 300 Port Size NPT Port Size NPT Port Size NPT Shipping Weights A B C D E F G H I J K L M in in mm in mm in mm in mm in mm in mm in mm in mm in mm in mm in in in lbs kgs 6 20 508 21 533 187 16 468 10 254 101 2 267 6 152 61 2 165 3 4 3 4 3 4 340 154 8 253 8 645 263 8 670 213 4 554 123 4 324 131 4 337 8 203 81 2 216 1 1 1 665 302 10 ...

Страница 7: ... EPDM optional Viton optional Voltage 24VDC 24VAC or 120VAC Enclosure General Purpose NEMA 4 standard Explosion Proof NEMA 6 6P 7 9 optional Action 4 Way Actuation Solenoid Action only Main valve action energize to open or energize to close is dependent on the particulars of the pilot system Brass solenoids are not lead free and it is illegal to use them in potable services in the United States su...

Страница 8: ... the valve opens or closes The adjustable collar is normally set to contact the trip arm when the main valve is closed The collar can be positioned on the stem by loosening the set screw to actuate the switch at the desired point of valve travel Single Pole Double Throw Switch Common Lug Normally Open Normally Closed Specifications Body Material Stainless Steel Elastomers Buna N standard EPDM opti...

Страница 9: ...on In the free flow direction the seat moves out of the flow path to all unrestricted flow Specifications Standard Flow Control Large Flow Control FLOW FLOW CLOSED Fluid Speed Controlled by Needle FLOW External Threads Internal Threads FLOW OPEN Free Flow Seat Full Open Size Standard Flow MNPT x 3 8 FNPT High Flow 1 2 MxF NPT Body Material Lead Free Brass Stainless Steel optional Seat Lead Free Br...

Страница 10: ...pilot circuit speed controls and pilots The filter element can be accessed for cleaning by removing the clean out cap or may be cleaned by installing an optional blow down ball valve The wetted surface of this product contacted by consumable water contains less than 0 25 of lead by weight Body Material Lead Free Copper Silicon Alloy CF8M 316 Stainless Steel optional Retainer Cap Lead Free Copper S...

Страница 11: ...are used in pilot lines to provide a positive shutoff in any override or maintenance situation for simple trouble shooting This 2 piece full port valve features bottom loaded stems PTFE seats and packing Size Dimensions Weight C H L in in mm in mm in mm lbs kg 1 4 113 16 46 37 16 87 13 4 45 0 4 0 2 3 8 113 16 46 37 16 87 13 4 45 0 4 0 2 1 2 113 16 46 37 16 87 115 16 50 0 4 0 2 3 4 21 4 57 4 101 25...

Страница 12: ...e switches at the desired point of valve travel Body Material Stainless Steel Elastomers Buna N standard EPDM optional Viton optional Enclosure NEMA 1 3 4 and 13 General Purpose standard NEMA 1 7 and 9 Explosion Proof optional Electrical Form C SPDT Switch 15 amp 125 250 or 480 VAC amp 125 VDC amp 250 VDC Conduit Connection The wetted surface of this product contacted by consumable water contains ...

Страница 13: ... made during installation to protect the piping circuit from dam age Only remove the pilot control system from the valve if necessary Tubing and fittings should be kept clean and replaced exactly as removed Consult appropriate hydraulic schematic to ensure proper re assembly 6 Connect solenoid wiring leads to desired switching device using safe standard electrical practices 7 Wire the limit switch...

Страница 14: ... of movement and remove excess air trapped within the cover chambers See Figure 1 Below To increase the rate of opening closing turn the adjustment screws on the speed controls OUT counterclockwise In decrease the rate of opening closing turn the adjustment screws on the speed controls IN clockwise STEP 2 Prior to pump start energize the solenoid to confirm connection to power source STEP 3 De ene...

Страница 15: ...ee flow goes into the lower chamber the Opening speed flow control restricts flow out of the upper cham ber of the main valve If valve opening is too slow turn the adjustment screw OUT counterclockwise increasing the rate of opening If valve opening is too quick turn the adjustment screw IN clock wise decreasing the rate of opening See Figure 2A STEP 8 At valve full open position deep well pump wi...

Страница 16: ...t valve 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 or tighten disc diaphragm assembly Test 2 Seat Seal Test 1 Close downstream isolation valve and install pressure gauges on an open inlet and outlet port of main valve 2 Open upstream isolatio...

Страница 17: ...lation 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...

Страница 18: ...tem Nut examine stem threads for mineral build up Remove deposits with a fine wire brush Extreme care should be taken not to damage the finish on stem guiding surfaces when disassembling Avoid applying pipe wrenches to top or bottom stem guide surfaces 6 After removing the Stem Nut the remainder of the Disc Diaphragm Assembly should disassemble easily Polish stem guide surfaces with fine emery clo...

Страница 19: ...es not work properly other costs 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 control This warranty shall be invalidated by any abuse misuse misapplication improper installation or improper maintenance or alteration of the product Some States do not ...

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