background image

STEP 3 

Manually operate the float linkage mechanism, allowing for the 
main valve to respond to the pilot. 

STEP 4 

Adjust Upper stop if main valve action allows the tank level to be 
higher than desired. When tank is full, valve starts closing (See 
Figure 2).

STEP 5

(If Installed) Open Opening Speed Flow Control Adjustment: 

The Opening 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), increasing the rate of opening.  

If valve opening is too quick, turn the adjustment screw IN, clock-
wise (See Figure 3A), decreasing the rate of opening. 

4          IOM-ACV-110-14_6110-14-4" 2115 

EDP# 1917107 

© 2021 Watts

IOM-ACV-110-14_6110-14-4" 2115 

EDP# 1917107 

© 2021 Watts         5

Counterclockwise to INCREASE 

the rate of opening

Clockwise to DECREASE 

rate of opening

3A

3B

Figure 3 

Flow Control

Upper Stop

Figure 2 

F10-13 - Float Control Pilot in Tank

Summary of Contents for LFM110-14

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 provided You are required to consult the local building and plumbing codes prior to installation If the information provided here is not consistent with local building or plumbing codes the local codes s...

Page 2: ...thout disassembly 3 Install isolation valves upstream and downstream of the main valve 4 Provide adequate clearance for valve servicing and maintenance Refer to valve servicing dimensions on next page Avoid installing valves 6 and larger in the vertical position main valve stem horizontal Automatic Control Valves ACVs are designed for horizon tal in line installation with the cover facing up main ...

Page 3: ...upstream isolation valve slowly Air is vented through the air bleed valve Tighten the fitting when liquid begins to vent See Figure 1 Globe Angle Size in 11 4 11 2 2 21 2 3 4 6 8 10 12 14 16 20 24 A in 16 16 20 22 22 24 32 34 38 44 48 52 56 56 B in 10 10 12 14 14 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 ...

Page 4: ...llows 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 increasing the rate of opening If valve opening is too quick turn the adjustment screw IN clock wise See Figure 3A decreasing the rate of opening 4 IOM ACV 110 14_6110 14 4 2115 EDP 1917107 2021 Watts Counterclockwise to INC...

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 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 ...

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 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 v...

Page 7: ...emove 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 the installation of lifting eye bolts in order to facilitate cover removal installation ports are provided on the cover for this purpose 4 Remove the Disc and Diaphragm Assembly from the valve body b...

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 threaded into the body of the valve and require a seat removal tool Figure 4 Table 1 details the tool dimensions for seat removal Valve seats 8 and larger are held in the valve body with stainless steel cap...

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 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 11 ...

Page 10: ...ess 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 Iron 13 Seat Disc Buna N Nitrile 14 Spacer Washer x5 NY300 Fiber 15 Disc Guide ASTM A743 CF8M 316 Stainless Steel 16 Shaft ASTM A276 304 Stainless Steel 17 Seat Ring ASTM A743 CF8M 316 Stainless Steel 17A Seat Screw 8 and Larger ASTM A276 3...

Page 11: ...IOM ACV 110 14_6110 14 4 2115 EDP 1917107 2021 Watts 11 NOTES ...

Page 12: ... not be responsible for any incidental special or consequential damages including without limitation lost profits or the cost of repairing or replacing other property which is damaged if this product does 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 ...

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