Watts LFM115-43 Installation Operation & Maintenance Download Page 11

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Optional

Xylan

Coating

17A

10 IOM-ACV-115-43_6115-43 2115

EDP# 1917037

IOM-ACV-115-43_6115-43 2115

EDP# 1917037

ACV Assembly Diagram – Series LFM115-43

Item

Description

Material

Pipe Plug

Lead Free Brass

Cover

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Cover Bearing

ASTM A276 304 Stainless Steel

Stud with Cover Nut and Washer

ASTM A570 Gr.33 Zinc Plated Steel

Body

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Spring

ASTM A276 302 Stainless Steel

Stem Nut

ASTM A276 304 Stainless Steel

Lock Washer

ASTM A276 304 Stainless Steel

Stem Washer

ASTM A276 304 Stainless Steel

Diaphragm Washer

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Diaphragm*

Buna-N (Nitrile)

Disc Retainer

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Seat Disc*

Buna-N (Nitrile)

Spacer Washer* x5

NY300 Fiber*

Disc Guide

ASTM A743 CF8M (316) Stainless Steel

Shaft

ASTM A276 304 Stainless Steel

Seat Ring**

ASTM A743 CF8M (316) Stainless Steel

17A

Seat Screw** (8" and Larger)

ASTM A276 304 Stainless Steel

Seat Gasket*

Buna-N (Nitrile)

* Contained in Main Valve Repair Kit

**Note: 6 inch and Smaller Valves, Seat Ring is threaded

Installation: If unit is installed in any orientation other than

horizontal (cover up) OR extreme space constraints exist,

consult customer service prior to or at the time of order.

NOTICE

Summary of Contents for LFM115-43

Page 1: ...tion 2 Setting the Pressure Reducing Control 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 plumb...

Page 2: ...y valves ensure valve disc does not contact the main valve 6 Provide adequate clearance for valve servicing and maintenance Refer to valve servicing dimensions on next page 7 Avoid installing valves 6 and larger in the vertical position main valve stem horizontal Automatic Control Valves ACVs are designed for horizontal in line installation with the cover facing up main valve stem vertical Slow op...

Page 3: ... 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 24 26 28 30 34 40 STEP 2 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 use a flat head screwdriver to slowly open the valve See Figure 1 If your valve does not include a bl...

Page 4: ...ed pressure set point by turning the adjustment screw OUT counterclockwise until downstream pressure decreases to the desired setpoint See Figure 3 STEP 6 Adjust the Surge Control by turning the adjustment screw IN clockwise to increase or OUT counterclockwise to decrease the downstream pressure surge set point See Figure 2 Counterclockwise to DECREASE downstream pressure Clockwise to INCREASE dow...

Page 5: ...kwise increasing the rate of closing Setting the Pressure Sustaining Control Step 1 Setting The Relief Sustaining Control requires lowering the upstream pressure to the desired minimum sustained pressure STEP 2 Leave the downstream isolation valve fully open and close the upstream isolation valve until the inlet pressure drops to the desired setting STEP 3 Adjust the Relief Sustaining Control scre...

Page 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...

Page 7: ...bly by partially opening from full closed position Improperly configured opening speed control if equipped Adjust opening speed control to verify functionality adjust as required Standard setting for opening speed control is 11 2 21 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 Di...

Page 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 ...

Page 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 6 Table 1 details the tool dimensions for seat removal Valve seats 8 and larger are held in the valve body with stainless steel ca...

Page 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...

Page 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...

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 o...

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