background image

STEP 6

Slowly open downstream isolation valve to establish flow through 
the system.

STEP 7

With a demand for flow on the system, the valve can now be ad-
justed for the proper flow rate. This requires a meter to

 

read the 

flow that the valve is providing.

STEP 8

While reading the meter register, adjust the Rate of Flow Control:

Turn the adjustment screw IN, clockwise, to increase the flow rate 

regulated (See Figure 2A).

Turn the adjustment screw OUT, counterclockwise, to reduce or 
lower the flow rate regulated (See Figure 2B).

Setting the Rate-of-Flow Control Pilot 

Counterclockwise to REDUCE  

Flow Rate Limit

Clockwise to INCREASE 

Flow Rate Limit

2A

2B

STEP 9

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, increasing the rate of opening (See Figure 3B).

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

STEP 10

Closing Speed Needle Valve Adjustment: The closing speed nee-
dle valve regulates fluid pressure into the main valve cover cham-
ber, controlling the valve closing speed.

If the valve closes too slowly, turn the adjustment screw OUT, 
counterclockwise, increasing the rate of closing.

STEP 11

Actuate the solenoid to close the main valve, checking that the 
main valve closes.

Counterclockwise to INCREASE 

the rate of opening

Clockwise to DECREASE 

rate of opening

3A

3B

Figure 3 

Flow Control

Figure 2 

CP14-1 Rate-of-Flow Control Pilot

4          IOM-ACV-114-1_6114-1 2115 

EDP# 1917071 

© 2021 Watts

IOM-ACV-114-1_6114-1 2115 

EDP# 1917071 

© 2021 Watts         5

Summary of Contents for LFM114-1

Page 1: ...the Rate of Flow 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 local...

Page 2: ...icator can be installed to provide visual indication of valve position and operation without 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 Valve...

Page 3: ...en the valve See Figure 1 STEP 4 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 Figure 1 Repeat the process until no air is trapped in the system STEP 5 Actuate the solenoid to open the main valve checking that the main valve opens Globe Angle Size in 11 4 11 2 2 21 2 3 4 6 8 10 12 14 16 ...

Page 4: ...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 increasing the rate of opening See Figure 3B If valve opening is too quick turn the adjustment screw IN clock wise decreasing the rate of opening See Figure 3A STEP 10 Closing Speed Needle Valve Adjustment The closing speed nee d...

Page 5: ...e 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 valv...

Page 6: ...k 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 se...

Page 7: ... 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...

Page 8: ... 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 c...

Page 9: ... 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 1...

Page 10: ...ss 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 30...

Page 11: ...IOM ACV 114 1_6114 1 2115 EDP 1917071 2021 Watts 11 NOTES ...

Page 12: ...ot 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 ov...

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