WATTS LFM116 Pressure Relief, Sustaining, or Backpressure Control Valve User Manual

User Manual for WATTS models including: LFM116 Pressure Relief Sustaining or Backpressure Control Valve, LFM116, Pressure Relief Sustaining or Backpressure Control Valve, Backpressure Control Valve

Series LFM116 / LFM6116 - Watts

Jun 27, 2020 — 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.

File Info : application/pdf, 21 Pages, 4.94MB

ES-ACV-LFM116

Submittal Package

ES-ACV-LFM116

Engineering Specification, Installation, Operation and Maintenance
Series LFM116 / LFM6116
Pressure Relief, Sustaining, or Backpressure Control Valve
Sizes: 1¼" to 24"

! 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.

! WARNING
Local building or plumbing codes may require modifications 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.
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 compliance 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.

LFM116

Table of Contents

Page

Engineering Specifications
ACV Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Basic Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Standard Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Optional Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation, Operation and Maintenance

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Valve Servicing Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Setting the Pressure Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ACV Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Valve Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . 19

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Engineering Specification

LEAD FREE*

Series LFM116

Pressure Relief, Sustaining or Backpressure Control Valve

Full Port Ductile Iron Single Chamber Valve

Features

· Opens when upstream pressure is above setpoint

· Closes when upstream pressure is below setpoint

· Adjustable Closing Speed

· When installed on branch of tee, acts as Pressure Relief Valve

· When installed between two pressure zones, acts as Pressure

Sustaining Valve

(AOS)

P/L

· When installed on discharge of a pump, acts as Backpressure

Control Valve

· Setpoint is adjustable

Standard Components
1 Main Valve (M100 - Single Chamber) 2 Relief / Sustaining Control 3 Adjustable Closing Speed X Isolation Cocks
Options and Accessories
{ FC Flo-Clean Strainer (Standard 1¼" 4") { Y Y-Strainer (Replaces Flo-Clean) { AOS Adjustable Opening Speed (Standard 1¼" 4") { P Position Indicator { L Limit Switch

X Y/FC

X 1

FLOW
CLOSES VALVE OPENS VALVE

Operation
The Pressure Relief, Sustaining or Backpressure Automatic Control Valve (ACV) is designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle toward closed when upstream pressure falls below the adjustable setpoint. It is controlled by a normally closed control pilot designed to: 1) Open (allowing fluid out of the main valve cover chamber) when upstream pressure is above the adjustable setpoint, and, 2) Close (allowing fluid to fill the main valve cover chamber) when upstream pressure is below the adjustable setpoint. An increase in upstream pressure causes the valve to modulate toward an open position. A decrease in upstream pressure causes the valve to modulate toward a closed position.
When the valve is installed "off the main line" on the branch of a tee, it serves as a Pressure Relief Control Valve. The valve is normally closed, and quickly opens when upstream pressure exceeds the pilot setting, relieving pressure, commonly discharging to a storage reservoir, pump suction, or atmosphere. When upstream pressure is lowered below the pilot setting, the valve closes at a controlled, adjustable rate.
When the valve is located "in line" connecting two distribution zones, the valve acts as a Pressure Sustaining Control Valve. When 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.

When the valve is installed "in line" on the discharge of a pump, it acts as Backpressure Control Valve. When pump discharge pressure falls below the pilot setting, the valve modulates toward a closed position, increasing backpressure against the pump. The valve should be specified to include the optional opening speed control when used for Backpressure applications.
*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.
NOTICE The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.

ES-ACV-LFM116 2115

ACV Schematic - Series LFM116

M Series Basic Valves

Pressure Relief, Sustaining or Backpressure Control Valve

Full Port Ductile Iron Single Chamber Basic Valve

This Watts Automatic Control Valve (ACV) is a full port, single chamber basic valve that incorporates a one-piece disc and diaphragm assembly. This assembly is the only moving part within the valve allowing it to open, close, or modulate as commanded by the pilot control system.
Watts ACV Main Valves are Lead Free. The Watts ACV piloting system contains Lead Free* components, ensuring all of our configurations are Lead Free compliant.
Globe Pattern Single Chamber Basic Valve (M100) Angle Pattern Single Chamber Basic Valve (M1100)

Basic Valve Body Options

Standard Materials

Body and Cover:

Ductile Iron ASTM A536

Coating:

NSF Listed Fusion Bonded Epoxy Lined and Coated

Trim:

316 Stainless Steel

Elastomers:

Buna-N (standard) EPDM (optional) VitonTM (optional)

Nut, Spring and Stem: Stainless Steel

Anti-Scale (Optional): Xylan Coated Stem and Seat

VitonTM is a trademark of The Chemours Company FC, LLC

Operating Pressure
Threaded = 400psi (27.6 bar) 150# Flanged = 250psi (17.2 bar) 300# Flanged = 400psi (27.6 bar) Grooved End = 400psi (27.6 bar)
Operating Temperature
Buna-N: 160°F (71°C) Maximum EPDM: 300°F (140°C) Maximum VitonTM: 250°F (121°C) Maximum Epoxy Coating**: 225°F (107°C) Maximum
** Valves can be provided without internal epoxy coating consult factory

Globe Flanged Globe Grooved End Globe Threaded

Angle Flanged Angle Grooved End
Angle Threaded

ES-ACV-LFM116 2115

ACV Schematic - Series LFM116

Flow Data

Suggested

Valve Size - Inches
Maximum Continuous Flow Rate Gpm (Water)
Maximum Intermittent Flow Rate Gpm (Water)

1¼ 1½

2 ½

130

210

300

485

800

1850

3100

5000

7000

8500

11100

119

161

265

390

590

1000

2300

4000

6250

8900

10800

14100

Minimum Flow Rate Gpm (Water)

190

400

CV Factor GPM (Globe) CV Factor GPM (Angle)

112

188

387

764

1215

1734

2234

3131

125

207

571

889

1530

1945

· Maximum continuous flow based on velocity of 20 ft. per second.

· Maximum intermittent flow based on velocity of 25 ft. per second.

· Minimum flow rates based on a 20-40 psi pressure drop.

· The Cv Factor of a value is the flow rate in US GPM at 60°F that will cause a 1psi drop in pressure.

· Cv factor can be used in the following equations to determine Flow (Q) and Pressure Drop (P):

Q (Flow) = CvP

P (Pressure Drop) = (Q/Cv)2

· The Cv factors stated are based upon a fully open valve. · Many factors should be considered in sizing control valves
including inlet pressure, outlet pressure and flow rates. · For sizing questions including cavitation analysis consult Watts
with system details.

16 12

2½

10 8

6 6
8

2½ 2

1¼ 1¼ 1½ 1½ 2

12 14

Angle Globe
100 80 60
40 30
20

Pressure Drop (psi)

10 8 6
4 3
2

4 6 8 10

40 60 80 100

200

500 1000 2000

5000

10000 20000

Flow Rate - Gallons per minute (Water)

Valve Cover Chamber Capacity

Valve Size - Inches
fl.oz. U.S. Gal

1 ¼

1 ½

2 ½

1 1/4

2 1/2

6 1/2

100000
16
9 1/2

Valve Travel
Valve Size - Inches
Travel - Inches

1 ¼

1 ½

2 ½

3/8

1/2

5/8

3/4

1 1/2

2 1/2

3 1/2

ES-ACV-LFM116 2115

Basic Valve

ACV Schematic - Series LFM116

2 8

Item
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 17A 18

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

Seat Screw** (8" and Larger) Seat Gasket*

ASTM A276 304 Stainless Steel Buna-N (Nitrile)

* Contained in Main Valve Repair Kit **Note: 6 inch and Smaller Valves, Seat Ring is threaded

Optional

Xylan

Coating

17A

NOTICE
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.

ES-ACV-LFM116 2115

Dimensions
D
A B C

ACV Schematic - Series LFM116

Flanged and Threaded

E FG

H I J

Grooved End
F E
E
A

E
D C

Flanged and Threaded Dimensions

Valve Globe Thread Globe 150# Globe 300# Cover To Angle Thread Angle 150# Angle 300# Angle Thread Angle 150# Angle 300# Port Size Port Size Shipping

Size

Center

NPT NPT Weights*

in. in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in.

11/4 71/4 184

51/2 140

3/8

11/2 71/4 184 81/2 216

51/2 140 31/4 83

17/8 48

3/8

2 93/8 238 93/8 238 10 254 63/4 171 43/4 120 43/4 121 5 127 31/4 83 31/4 83 31/2 89 3/8

21/2 11 279 11 279 115/8 295 71/2 191 51/2 140 51/2 140 57/8 149 4 102 4 102 45/16 110 1/2

3 121/2 318 12 305 131/4 337 81/4 210 61/4 159 6 152 63/8 162 41/2 114 4 102 43/8 111 1/2

15 381 155/8 397 105/8 270

71/2 191 77/8 200

5 127 55/16 135 3/4

20 508 21 533 13 330

10 254 101/2 267

6 152 61/2 165 3/4

253/8 645 263/8 670 16 406

123/4 324 131/4 337

8 203 81/2 216 1

293/4 756 311/8 791 17 430

147/8 378 159/16 395

85/8 219 95/16 237 1

34 864 351/2 902 207/8 530

17 432 173/4 451

133/4 349 141/2 368 1

39 991 401/2 1029 241/4 616

413/8 1051 431/2 1105 251/4 640

L in. lbs. kgs. 1/4 20 9 1/4 25 11 1/2 40 18 1/2 65 29 1/2 95 43 3/4 190 86 3/4 320 145 1 650 295 1 940 426 11/4 1500 680 11/2 1675 760 2 3100 1406

Grooved End Dimensions

Valve Size
in. 1 1/4 1 1/2 2 21/2 3 4 6 8

Globe Grooved

in.

8 1/2

216

8 1/2

216

229

279

121/2

318

381

508

253/8

645

Cover To Center

in.

5 1/2

140

5 1/2

140

6 1/2

165

7 1/2

191

8 1/4

210

10 5/8

270

13 3/8

340

406

Angle Grooved

in.

4 1/4

108

4 1/4

108

4 3/4

121

51/2

140

152

7 1/2

191

Angle Grooved

in.

3 1/4

102

4 1/4

108

127

Port Size (npt) E in. 3/8 3/8 3/8 1/2 1/2 3/4 3/4 1

Port Size (npt) F in. 1/4 1/4 1/2
1/2
1/2
3/4
3/4 1

Shipping Weights*

lbs.

kgs.

190

320

145

650

295

ES-ACV-LFM116 2115

ACV Standard Components - Series LFM116

LEAD FREE*

Model LFPV20C

Pressure Relief, Sustaining or Backpressure Pilot

Size: 1/2" NPT
The Model LFPV20C is a remote sensed direct acting, diaphragm actuated Pilot that is used on various configurations of Automatic Control Valves.
It is normally held closed by the force of the adjustable spring setting above the diaphragm. It modulates toward an open position when control pressure, exerting force below the diaphragm, exceeds the spring setpoint, and modulates toward a closed position when the control pressure falls below the spring setpoint. The LFPV20C senses control pressure through a tapped port below the diaphragm. The large diaphragm-to-seat ratio allows it to open and close within tight pressure tolerances, accurately positioning the Main Valve.
Turning the adjustment screw clockwise raises the control setpoint. Turning the adjustment screw counterclockwise lowers the control setpoint.
The LFPV20C is equipped with one 1/2" NPT inlet and outlet port and a 1/4" NPT side sensing port located on the power chamber. The 1/4" side sensing port is used to monitor upstream or downstream pressure as required by specific valve function.

7.30

18 6

Model LFPV20C

Specifications
Body Material: Seat: Elastomers:
Inlet Pressure Rating: Adjustment Rating:

Lead Free Copper Silicon Alloy
316 Stainless Steel
Buna-N (standard) VitonTM (optional) EPDM (optional)
400psi (27.6 bar) maximum
20-200psi (1.4 - 13.8 bar) (standard) 0-30psi (0 - 2.1 bar) (optional) 100-300psi (6.9 - 20.7 bar) (optional) 200-450psi (13.8 - 31.0 bar) (optional)

VitonTM is a trademark of The Chemours Company FC, LLC
*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

1.00 Inlet

17 7 Sense Port 8 9 10
11
Outlet
3.50

Item

2
20
3

Description
Adjusting Screw Jam Nut
Spring Housing Spring Guide
Spring Cap Screw Power Chamber
O-Ring* Body Seat
O-Ring*

Item
12 13 14 15 16 17 18 19 20 21

Description
Nut Lockwasher Diaphragm Washer Diaphragm* Diaphragm Washer
O-Ring* Stem Retainer Rubber Disc* Screw
*Included in Repair Kit

ES-ACV-LFM116 2115

ACV Standard Components - Series LFM116
LEAD FREE*
Model LFFC
Flow Control
Size: 1/2" NPT
A Flow Control is an adjustable device used for tuning valve performance. It can be installed to either control the opening or closing the speed of the automatic control main valve. When the flow is in the direction of the needle the flow control is an adjustable restriction. In the free flow direction the seat moves out of the flow path to all unrestricted flow.

CLOSED
Fluid Speed Controlled by Needle

OPEN
Free Flow Seat Full Open

FLOW FLOW

Model LFFC

Specifications

Size:

1/2" NPT

Body Material:

Lead Free Brass Stainless Steel (optional)

Seat:

Lead Free Brass

Needle:

Stainless Steel (304)

Elastomers:

Buna-N (standard)

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

ES-ACV-LFM116 2115

ACV Standard Components - Series LFM116
LEAD FREE* Model BV
Ball Valve
Size: ¼" 1" NPT
Model BV Ball Valves are used in pilot lines to provide a positive shutoff in any override or maintenance situation for simple trouble shooting. This 2-piece, full port valve features: bottom loaded stems, PTFE seats and packing.
Lead Free Ball Valve

Specifications

Standard Material: Copper Silicon Alloy Body and Adaptor

Chrome Plated Ball

Optional Material: Stainless Steel Housing, Body and Adaptor Stainless Steel Ball

Pressure Rating: 600psi (41 bar) Non Shock

Temp Rating:

-40°F - 400°F

Size

Dimensions

Weight

in.

mm lbs.

kg.

1/4

1 13/16

46 37/16 87 13/4 45 0.4 0.2

3/8 113/16 46 37/16 87 13/4 45 0.4 0.2

1/2

1 13/16

46 37/16 87 115/16 50 0.4 0.2

3/4

2 1/4

4 101 25/16 59 0.8 0.3

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

ES-ACV-LFM116 2115

ACV Options and Accessories - Series LFM116

LEAD FREE*
Model LF60
Flo-Clean Strainer
Size: ¼" 3/4" NPT
Model LF60 Flo-Clean Strainers are used to filter the fluid passing through the pilot circuit, and provide protection to pilot circuit speed controls and pilots. It is installed in the inlet body port of the Main Valve, exposing the strainer element to main line flow. The currents and flow across the screen create a self-scouring effect, cleaning the filter element.

Model LF60

Valve inlet with Filter installed

Specifications

Body Material:

Lead Free Brass (standard) Stainless Steel (optional)

Pressure Rating: 400psi (27.6 bar)

Filter Element:

Monel

Screen Mesh:

40 Mesh (standard)

A
Male Pipe Thread in. 1/4 3/8 1/2

B
Female Pipe Thread in. 1/8 1/4 3/8

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

ES-ACV-LFM116 2115

ACV Options and Accessories - Series LFM116

LEAD FREE*
Model LF60-1
Y-Pattern Strainer
Size: ¼" 3/4" NPT
Model LF60-1 Y-Pattern Strainers are used to filter the fluid passing through the pilot circuit, and provide protection to pilot circuit speed controls and pilots. The filter element can be accessed for cleaning by removing the clean-out cap, or may be cleaned by installing an optional "blow-down" ball valve.

A Inlet
B

Model LF60-1

Specifications

Body Material:

Lead Free Copper Silicon Alloy CF8M (316) Stainless Steel (optional)

Retainer Cap:

Lead Free Copper Silicon Alloy

Cap Gasket:

EPDM

Pressure Rating: 400psi (27.6 bar)

Filter Element:

304 Stainless Steel

Mesh Options:

60 Mesh (standard) 100 Mesh (optional)

Dimensions

SIZE

in.

1/4

2 11/16

3/8

2 11/16

1/2

3/4

3 5/16

DIMENSIONS

1 11/16

2 5/16

WEIGHT

lbs.

kgs.

1.7

0.77

1.7

0.77

1.7

0.77

1.7

0.77

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

ES-ACV-LFM116 2115

ACV Options and Accessories - Series LFM116
LEAD FREE*
Model 50
Position Indicator
When specified as an option on a Control Valve, the Model 50 Position Indicator is installed in the topmost cover port of the Main Valve and allows for visual indication of valve position. The Model 50 is also very useful during valve start-up and troubleshooting procedures.
A stainless steel indicating rod threads into the tapped portion of the Main Valve stem and moves inside of a cylindrical Pyrex sight tube. The indicating rod travels up and down, following Main Valve stem movement. The housing protects the sight tube and indicating rod, and allows visibility on two sides. The screw driver operated test cock installed on the top of the Model 50 housing provides a controlled method of removal of air from the cover chamber during start-up or troubleshooting of the Main Valve.

1 2 4
5
6 7

Item
1 2 3 4 5 6 7

Description
Test Cock Housing Gasket Pyrex Sight Tube
Body Indicating Rod Stem Adaptor (8" or Larger)

ES-ACV-LFM116 2115

Model LF50

Specifications
Standard Material:

Stainless Steel Housing and Body Stainless Steel Indicating Rod

3 Optional Material:

Lead Free Test Cock Pyrex Sight Tube
Stainless Steel Test Cock

Pressure Rating:

400psi (27.6 bar)

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Dimensions

Valve Size (in)
11/4 - 11/2 2 2 1/2 3 4 6 8 10 12 14 16 18* 20* 24*

Dimension (in)
7 3/8 4 7/8 4 7/8 4 7/8 5 5 5 7/8 5 7/8 7 1/4 7 1/4 7 1/4 7 1/4 7 1/4 7 1/4
*Reduced Port

ACV Options and Accessories - Series LFM116
LEAD FREE*
Model 51
Single Limit Switch
The Model 51 Single Limit Switch provides visual indication of valve position, as well as remote electrical indication of "valve open" or "valve closed". The single pole double throw MicroSwitch can be connected to open or close an electrical circuit when the valve opens or closes. The adjustable collar is normally set to contact the trip arm when the main valve is closed. The collar can be positioned on the stem by loosening the set-screw to actuate the switch at the desired point of valve travel.

Model LF51

Common Lug

Normally Closed

Normally Open

Single Pole Double Throw Switch

9 10 11 12
13 2

14 15

Specifications
Body Material: Stainless Steel

Elastomers:

Buna-N (standard) EPDM (optional) VitonTM (optional)

Enclosure:

NEMA 1, 3, 4 and 13 General Purpose (standard) NEMA 1,7 and 9 Explosion Proof (optional)

Electrical:

Form C SPDT Switch 15 amp. 125, 250 or 480 VAC 1/2 amp. 125 VDC 1/4 amp. 250 VDC 1/2" Conduit Connection

VitonTM is a trademark of The Chemours Company FC, LLC

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Parts List
Item
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Description
Limit Switch Bracket Stem Trip collar Set Screw Cap
Wiper Ring* O-Ring* Guide O-Ring* Polypak* Locknut Body Pin Coupling
*Included in Repair Kit

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116
Installation
Start-up of an automatic control valve requires that proper procedures be followed. Time must be allowed for the valve to react to adjustments and the system to stabilize. The objective is to bring the valve into service in a controlled manner to protect the system from damaging over-pressure.
1. Clear the line free of slag and other debris. 2. Install the valve so that the FLOW ARROW marked on the valve body/tag corresponds to flow through the line. 3. Close upstream and downstream isolation valves. 4. Open the isolation ball valves in the control tubing if so equipped. Failure to open these will prevent the valve from functioning properly. 5. Install pressure gauges at locations upstream and downstream of the valve.

Valve Servicing Dimensions

B A

D C

FLOW

The following tables detail the recommended minimum valve servicing dimensions.

Globe

Size (in) 1¼ 1½

2½

10 12 14 16 20 24

A (in)

B (in)

Angle

Size (in) 1¼ 1½

2 ½

10 12 14 16

C (in)

D (in)

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116
Setting the Pressure Controls
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.
Pressure Reducing Adjust OUT, counterclockwise, backing pressure off the spring, preventing possible over-pressuring of the system.
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
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, as shown to the right, use a flat head screwdriver to slowly open 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 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 system.

Counterclockwise to OPEN bleed valve
Figure 1 Position Indicator

STEP 4
Slowly open downstream isolation valve to establish flow through the system.

Clockwise to increase inlet pressure

Counterclockwise to decrease inlet pressure

STEP 5
Setting the Sustaining Control requires lowering the upstream pressure to the desired minimum sustained pressure.

STEP 6
Leave the downstream isolation valve fully open and close the upstream isolation valve until the inlet pressure drops to the desired setting.

STEP 7
Adjust the Sustaining Control screw IN, clockwise, until the inlet pressure begins to increase, or OUT, counterclockwise to decrease, stopping at the desired pressure (See Figure 2).

Figure 2 PV20C -- Pressure Sustaining Control

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116
STEP 8
Allow pressure to stabilize.

STEP 9
Fine-tune the sustaining setting as required as detailed in STEP 7.

STEP 10
Open the upstream isolation valve to return to normal operation.
STEP 11
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 desired set point, turn the adjustment screw OUT, counterclockwise, increasing the rate of closing.

Clockwise to DECREASE rate of opening

Counterclockwise to INCREASE the rate of opening

(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 recovery of pressure is slow upon increased downstream demand, turn the adjustment screw OUT, counterclockwise, increasing the rate of opening. IF recovery of downstream pressure is too quick, as indicated in a rapid increase in pressure, possibly higher than the desired set-point, turn the adjustment screw IN, clockwise, decreasing the rate of opening (See Figure 3).

Figure 3 Flow Control

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116
Automatic Control Valve Maintenance Schedule

To ensure peak performance and longevity of your automatic control valve, Watts/Ames recommends following the below standard maintenance schedule.
· Monthly Maintenance Visual inspection of valve(s) for leaks Inspect for proper operation(s); exercise valve.
· Quarterly Maintenance Conduct monthly inspection. Validate/Re-establish necessary setpoints of controls/pilots.

· Annual Maintenance Conduct monthly & quarterly inspections. Inspect & clean all strainers. Inspect valve coating, touch up as required.
· 3-5 Year Maintenance Conduct monthly, quarterly, & annual maintenance. Inspect & replace valve elastomers (diaphragm, O-rings, valve/pilot seats) Re-establish necessary set points of controls/pilots.

Troubleshooting Guide
! WARNING
Warning: The valve cannot be serviced under pressure. Upstream and downstream Isolation Valves must be installed to protect system piping. Accurate diagnosis and troubleshooting requires the valve to open fully, and may subject downstream piping and equipment to high pressure and/or flow rates. The downstream Isolation Valve should be kept closed while diagnosing the valve.
Extreme caution should be used while performing the troubleshooting techniques listed below.
Recommended tools for diagnosis: (3) PRESSURE GAUGES, installed to monitor the inlet pressure, outlet pressure, and cover chamber pressure. If included, a POSITION INDICATOR should be installed to visually assess the position of the disc & diaphragm assembly.
Test 1: Diaphragm Seal Test
1. Close upstream & downstream isolation valves. Close pilot isolation valves or remove pilot control tubing to isolate valve cover from incoming fluid & pressure. Remove uppermost cover plug, test cock, or limit switch.
2. With the valve cover chamber vented to atmosphere, partially open the upstream isolation valve, allowing incoming pressure to lift the disc & diaphragm assembly. A volume of water will be displaced from the cover chamber as the valve opens; consult valve 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 to allow pressure on to the valve cover. Allow valve to fully close.
3. Monitor downstream pressure gauge; reading should hold steady below incoming pressure. If pressure on downstream side rises to match upstream pressure, leakage is occurring through the seat of the main valve. Disassemble valve, inspect and repair/replace any required parts.
a. If gauge pressure rises to match outlet pressure (downstream of closed isolation valve) yet remains below inlet pressure, the isolation valve may be leaking as opposed to main valve seat.
Test 3: Freedom of Movement/Valve Travel Test
1. Close upstream and downstream isolation valves. Install valve position indicator.
2. Partially open upstream isolation valve and allow cover to fill with fluid & pressure, closing the valve fully. Mark the position indicator's full closed position.
3. Isolate cover chamber from receiving fluid and pressure by closing isolation valves or removing control tubing.
4. Carefully vent cover chamber to atmosphere by opening test cock or removing a cover plug. Observe the valve position indicator as the valve travels to the full-open position. The disc & diaphragm assembly should move freely from fully closed to fully open position without binding or "grabbing" at any point during its movement.
a. The disc & diaphragm assembly may momentarily "hesitate" while travelling from fully closed to fully open position this is a normal characteristic of diaphragm operated control valves, and does not indicate mechanical binding or improper valve operation.
b. A continuous discharge of water from the cover chamber after venting to atmosphere indicates leakage past the diaphragm.
5. If necessary, disassemble valve and inspect/repair disc & diaphragm assembly.

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116

Troubleshooting Guide

Issue
Main Valve will not open
Main Valve will not close

Possible Cause
Closed isolation valves in pilot system. Insufficient supply pressure.
Main valve stem assembly corroded/ damaged. Blockage in pilot system.
Missing fixed orifice assembly.
Improperly configured opening speed control (if equipped).
Closed isolation valves in pilot system Diaphragm is damaged Main valve stem assembly corroded/ damaged. Blockage in main valve.
Worn/damaged valve seat.

Corrective Action
Check isolation valves, ensure open. Check upstream pressure.
Inspect stem assembly, clean/ replace if necessary. Inspect & clean any installed pilot system strainers, check orifice/speed controls for blockages. Verify installation of orifice; replace if required/missing.
Adjust opening speed control to verify functionality, adjust as required.
Check isolation valves, ensure open. Conduct diaphragm seal test, repair and replace if necessary. Inspect stem assembly, clean/ replace if necessary. Perform freedom of movement test; if valve does not close, disassemble and remove blockage. Perform seat sealing check; disassemble and inspect/repair seat if required.

Notes
Depending on water source, supply pressure may not be controlled by valve operator.
Pilot valve inlet isolation valve can be used as a makeshift orifice assembly by partially opening from full closed position. Standard setting for opening speed control is 11/2 - 21/2 turns open from full closed position. Can be adjusted in field.

ES-ACV-LFM116 2115

Installation, Operation and Maintenance - Series LFM116

Valve Disassembly Instructions

Before undertaking valve disassembly, it is recommended to gather the following tools to aid you during the process:

· Small & large adjustable wrenches

· Screwdriver set

· Machinist fine metal file · Fine wire brush

VALVE COVER

· Bench vise

· Basic valve IO&M manual · Hammer & dull cold chisel · Heavy-duty ratchet & socket set

BRASS BAR STOCK (ANGLE UPWARD)

· Hexagonal wrench set

· 320 grit/fine Emery cloth
· Appropriate technical bulletins for valve start-up procedures.

HAMMER

1. Isolate the valve from line pressure and depressurize it to ensure safe working conditions. Disconnect any electrical connections if so equipped.
2. Carefully remove Position Indicator or Limit Switches if equipped. Remove all tubing, fittings, and Control Pilots necessary to easily access and remove the cover. 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, pictured 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 by lifting straight up.
a. Large diameter valves may require a lifting "eye" bolt to be installed in the valve stem accessory threads located on the very top of the valve stem.
5. Before removing Stem Nut, examine stem threads for mineral build-up. Remove deposits with a fine wire brush. Extreme care should be taken not to damage the finish on stem guiding surfaces when disassembling. Avoid applying pipe wrenches to top or bottom stem guide surfaces.
6. After removing the Stem Nut, the remainder of the Disc & Diaphragm Assembly should disassemble easily. Polish stem guide surfaces with fine emery cloth to remove any mineral deposits and inspect for excessive wear. Remove any mineral build-up from other components with wire 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 cap screws. Remove seat retaining screws and lift seat straight up (Figure 5).

B (Min)

E Dia. 4 Holes

90 Apart

Angle or Channel Iron

Nut and Washer
2PLCS
All-Thread

C TYP <3 PLCS>

120

Valve Seat

ES-ACV-LFM116 2115

D TYP <3 PLCS> 120 Apart

Valve Body

Figure 4

Figure 5
19

Installation, Operation and Maintenance - Series LFM116

Table 1: Seat Removal Tool Dimension

Size

Pipe Size (in)

1 ¼

1 ½

1 ¼

2 ½

B Min. Length (in)
3.12 3.12 3.38 4.0 4.5 5.0 6.50

E (Dia.)

0.38

0.25

0.44

0.55

0.38

0.25

0.44

0.50

0.38

0.25

0.44

0.50

0.38

0.56

0.62

0.50

0.38

0.56

0.62

0.50

0.44

0.56

0.62

0.44

0.56

0.62

*Schedule 40 steel pipe

8. Replace Seat Disc, Diaphragm and Spacer Washers provided in Main Valve repair kit (refer to Table 2 or 3 for correct repair kit part number). Re-assemble in the reverse order of disassembly.

Table 2: Full Port Valve (M100/M1100) Repair Kits

Size (in) 1¼

1 ½

2 ½

P/N 0677-01 0677-01 0677-02 0677-03 0677-04 0677-05 0677-06 0677-07 0677-08 0677-09 0677-10 0677-11

Table 3: Reduced Port Valve (M6100 / M61100) Repair Kits

Size (in) P/N

3 0677-02

4 0677-04

6 0677-05

8 0677-06

10 0677-07

12 0677-08

16 0677-09

20 & 24 0677-11

9. Re-Install Disc and Diaphragm Assembly in the valve, taking care not to damage the lower guide area in the center of the valve seat.
10. Re-install Cover Spring. Replace Valve Cover and tighten Cover 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 in the Setting the Pressure Controls section matching the valve function.

ES-ACV-LFM116 2115

Notes - LFM116

Limited Warranty: Watts Regulator Co. (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall 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 over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product. Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

ES-ACV-LFM116 2115

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References

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