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Installation, Operation and Maintenance

Pressure Reducing Control Valve with Downstream Surge Control 

Feature

Sizes: 11/4" to 24" 

NOTICE

For Australia and New Zealand: Pipeline strainers should be 

installed between the upstream shutoff valve and the inlet of  

the backflow preventer.

It’s important that this device be tested periodically in compli-

ance with local codes, but at least once per year or more as 

service conditions warrant. If installed on a fire sprinkler system, 

all mechanical checks, such as alarm checks and backflow  

preventers, should be flow tested and inspected internally in  

accordance with NFPA 13 and NFPA 25.

WARNING

!

Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information 

can result in death, serious personal injury, property 

damage, or damage to the equipment.
Keep this Manual for future reference.

Table of Contents  

Page

Introduction .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2

Installation .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 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 plumbing codes, the 

local codes should be followed.  This product must be 

installed by a licensed contractor in accordance with 

local codes and ordinances.

WARNING

!

Need for Periodic Inspection/Maintenance:

  This product 

must be tested periodically in compliance with local codes, 

but at least once per year or more as service conditions 

warrant .  All products must be retested once maintenance 

has been performed .  Corrosive water conditions and/or 

unauthorized adjustments or repair could render the product 

ineffective for the service intended .  Regular checking and 

cleaning of the product’s internal and external components 

helps assure maximum life and proper product function . 

WARNING

!

Model LFM115-7/LFM6115-7

IOM-ACV-115-7_6115-7

Summary of Contents for LFM115-7

Page 1: ... 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 plumbing co...

Page 2: ...m from damaging over pressure 1 Prior to installation flush line to remove debris 2 Install valve so the flow arrow matches flow through the line and gauges to monitor valve inlet and outlet pressures A Position Indicator 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 Open the ...

Page 3: ...Figure 1 If your valve does not include a bleed valve bleed air by loosen ing a fitting on the valve or a plug at the highest point of the valve assembly Step 3 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 sy...

Page 4: ...ontrol pressure set point by turning the Pressure Reducing Control adjustment screw IN clockwise STEP 2 Adjust the Surge Control by turning the adjustment screw OUT counterclockwise to decrease the downstream pressure surge set point until the Surge Control starts to reduce the downstream pressure Turn the adjustment screw out to the required set point See Figure 3 STEP 3 Decrease the downstream p...

Page 5: ...he adjustment screw IN clockwise decreasing the rate of opening See Figure 4 Step 5 If the main valve comes equipped with a closing speed control otherwise ignore this step 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 the downstream pressure fluctuates slightly above the desire...

Page 6: ...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 7: ...mbly 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 D...

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 5 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 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 1...

Page 11: ...l 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 17A...

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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