background image

STEP 1

Pre-set pilots as noted:

Pressure Sustaining

 – Turn Sustaining Control adjustment screw OUT, counterclockwise, backing pressure off the spring, to allow it to 

stay open while adjusting the other controls.

Opening and Closing Speed

 – Turn the adjustment screws on the Closing Speed and Opening Speed Controls, if the main valve is so 

equipped, OUT, counterclockwise, 11/2 to 21/2 turns from full closed position.

STEP 2

Energize the solenoid to check actuation and to confirm connection to power source.

STEP 3

De-energize the solenoid so that initial valve filling is against the closed solenoid.

STEP 4 

To ensure proper operation, any trapped air will need to be bled off 

the valve cover during startup. If your ACV includes a bleed valve, 

the valve (See Figure 1). 

If your valve does not include a bleed valve, bleed air by loosening 

a fitting on the valve or a plug, at the highest point of the valve as-

sembly.

STEP 5

Pressure the line, by opening the upstream isolation valve slowly 

Air is vented through the air bleed valve or loosened fitting. Tighten 

the fitting when liquid begins to vent (See Figure 1).

Repeat the process until no air is trapped in the system.

STEP 6

Actuate the solenoid to open the main valve, checking that the 

main valve opens.

Globe

Angle

Size (in)

1

 

1/4

1

 

1/2

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)

1

 

1/4

1

 

1/2

2

2

 

1/2

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

Counterclockwise to OPEN 

bleed valve

Setting the Pressure Controls

The following tables detail the recommended minimum valve servicing dimensions.

          

B

          

          

FLOW

FLOW

FLOW

          

FLOW

Valve Servicing Dimensions

Figure 1 

Position Indicator

IOM-ACV-116-31_6116-31 2115 

EDP# 1917047 

© 2021 Watts         3

Содержание LFM116-31

Страница 1: ...Setting the Pressure 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 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 l...

Страница 2: ... the upstream zone The valve will close if necessary until upstream pressure is above the pilot setting The valve should be specified to include the optional opening speed control and position indicator when used for Pressure Sustaining applications 1 X X X Y FC 3 AOS 1 2 P L 4 CLOSES VALVE OPENS VALVE FLOW 1 Clear the line free of slag and other debris 2 Install the valve so that the FLOW ARROW m...

Страница 3: ...eed air by loosening a fitting on the valve or a plug at the highest point of the valve as sembly STEP 5 Pressure the line by opening the upstream isolation valve slowly Air is vented through the air bleed valve or loosened fitting Tighten the fitting when liquid begins to vent See Figure 1 Repeat the process until no air is trapped in the system STEP 6 Actuate the solenoid to open the main valve ...

Страница 4: ...n valve until the inlet pressure drops to the desired setting Fine tune the Reducing Control adjustment to the pressure reduc ing setpoint as detailed in Step 7 STEP 10 Adjust the Sustaining Control screw IN clockwise until the inlet pressure begins to increase or OUT counterclockwise to de crease stopping at the desired pressure See Figure 2 4 IOM ACV 116 31_6116 31 2115 EDP 1917047 2021 Watts Fi...

Страница 5: ...T counterclockwise increasing the rate of closing IF INSTALLED Opening Speed Flow Control Adjustment The Opening speed flow control allows free flow into the cover and re stricted flow out of the cover of the main valve If recovery of pres sure is slow upon increased downstream demand turn the adjust ment screw OUT counterclockwise increasing the rate of open ing IF recovery of downstream pressure...

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 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...

Страница 7: ... Adjust opening speed control to verify functionality adjust as required Standard setting for open ing speed control is 1 1 2 2 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...

Страница 8: ...Remove 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 ...

Страница 9: ...brush 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 ca...

Страница 10: ...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 11...

Страница 11: ...eel 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 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 1...

Страница 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 o...

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