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STEP 8

Closing Speed Needle Valve Adjustment: The closing speed needle 

valve regulates fluid pressure into the main valve cover chamber, 

controlling the valve closing speed. If valve closing is too slow, turn 

the adjustment screw OUT, counterclockwise, increasing the rate of 

closing (See Figure 3).

STEP 9

(If Installed) 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. If valve opening is too quick, turn the adjustment screw 

IN, clockwise, decreasing the rate of opening (See Figure 3).

STEP 10

Actuate the solenoid to close the main valve, checking that it 

closes.

Counterclockwise to INCREASE 

the rate of opening

Clockwise to DECREASE 

rate of opening

Figure 3 

Flow Control

4          IOM-ACV-116-32_6116-32 2115 

EDP# 1917049 

© 2021 Watts

IOM-ACV-116-32_6116-32 2115 

EDP# 1917049 

© 2021 Watts         5

Содержание LFM116

Страница 1: ...llation 2 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 c...

Страница 2: ...n pressure in the upstream zone falls below the pilot setting the valve modulates toward a closed position sustaining pressure in 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 ...

Страница 3: ...lve 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...

Страница 4: ...s to the desired setting STEP 4 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 STEP 5 Allow pressure to stabilize STEP 6 Fine tune the sustaining setting as required as detailed in STEP 4 STEP 7 Open upstream isolation valve to return to normal operation 4 IOM ACV 116 32...

Страница 5: ...peed 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 If valve opening is too quick turn the adjustment screw IN clockwise decreasing the rate of opening See Figure 3 STEP 10 Actuate the solenoid to close the main valve checking that it close...

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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