a discussion on the use of rw gate valves

A DISCUSSION ON THE USE OF AMERICAN SERIES 2500RW GATE VALVES

Presented By:Brian J. Anderson

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FOUNDED - 1905

AMERICAN: Who We Are

John J. Eagan

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GOLDEN RULE ADOPTED AS GUIDING PRINCIPAL – 1921EAGAN TRUST ESTABLISHED 1924


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AMERICAN Flow Control

AVH BEAUMONT, TEXAS

WATEROUSSOUTH ST. PAUL, MINNESOTA

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AMERICAN Flow Control Product Line

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2” – 66”

RW GATE VALVES

SERIES 2500 - RESILIENT WEDGE GATE VALVES

NRS OS&Y

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VALVE SELECTION

• START - EARLY IN THE PROJECT

• AVOID - USING OLD PROJECT SPECS

• AVOID - USING WHAT WAS USED LAST TIME

• LOOK - AT BIGGER PICTURE

• LOOK - AT EACH PROJECT ON ITS OWN MERIT

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VALVE APPLICATIONS

MULTI-TURN VALVES: OPEN/CLOSE

QUARTER TURN VALVES: THROTTLING

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FLUID MEDIUM

HISTORICALLY –

RAW WATER: GATE VALVESBUTTERFLY VALVES

RE-USE WATER: GATE VALVESBUTTERFLY VALVES

TREATED WATER: GATE VALVESBUTTERFLY VALVES

WASTEWATER: GATE VALVES - VERTICALPLUG VALVES

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VALVE JOINT REVIEW

MECHNICAL JOINT

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VALVE JOINT REVIEW

FLANGE

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VALVE JOINT REVIEW

PUSH-ON JOINT 16” & SMALLER

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VALVE JOINT REVIEW

FLEX-RING® JOINT

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BUTTERFLY VALVES

AMERICAN MANUFACTURED BUTTERFLY VALVES (BFV) THROUGH 84”

DISCONTINUED PRODUCTION IN 1994.

EXPERIENCED IN MANUFACTURING BOTH BFV AND LARGE DIAMETER GATE VALVES

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BUTTERFLY VALVES - REVIEW

MANUAL ACTUATORS

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SEAT WIDTH

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SEAT ADJUSTMENT

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SEAT DAMAGE

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POTENTIAL FOR LEAKS

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CORROSION AND BUILD-UP

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MUST BE REMOVED TO REPLACE SEAT OR REPAIR

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FLOW RESTRICTION

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PUMPING COST – 10X GREATER

PUMPING COST = QHRT5309e

Where: Q = Flow Rate, GPM

H = Head Loss, Ft of Water

R = Electricity Rate , Assumption $0.10 per KW

T = Average Yearly Pumping Time / Assumption 8760 Hrs

e = Pump Efficiency, Assumption 0.80

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LIMITS CLEANING / PIGGING OF LINE

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OTHER COSTS TO REPLACE VALVE

DE-WATER & RE-FILL

EXCAVATION

LABOR AND MATERIALS

POTENTIAL LINE CONTAMINATION

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GATE VALVE - HISTORY

DOUBLE DISC GATE VALVES

• Originally Covered by ANSI/AWWA C500

• Arbitrary Wall Thicknesses

• Closure Achieved by a “Bridging Action”

• Limited Coating

• Pockets

• Build-Up in Seats

• Elevated Torques – Required By-Passes

• Allowable Leakage - 1 oz – per inch – per hour

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• Susceptible to build-up• Susceptible to corrosion• Lower pressure ratings• Prone to damage• Multiple parts

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• By-passes

•Rollers, Tracks and Scrapers

•Clean-outs

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RW GATE VALVE - HISTORY

RESILIENT WEDGE GATE VALVES

• Development of ANSI/AWWA C509

• Fusion-Bond Epoxy (FBE) Inside and Out

• Smooth Waterway

• Single Piece Encapsulated Wedge

• Elevated Pressure Rating to 200 psig

• Zero Leakage

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RW GATE VALVE - HISTORY

RESILIENT WEDGE GATE VALVES

• Development of ANSI/AWWA C515

• Use of DI (65-45-12) = Lighter / Stronger

• Smooth Waterway

• Single Piece Fully Encapsulated EPDM Wedge

• Elevated Pressure Rating to 250 psig

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AWWA C-500 - METAL SEATEDAllowable Leakage @ 150 psig (14” and Larger)

Heavy Wall Thickness

AWWA C-509 – RESILIENT SEATEDGray Cast Iron BodyZero LeakagePressure Rating @150 psig (14” and Larger)

Heavy Wall Thickness

AWWA C-515 - RESILIENT SEATEDDuctile Iron BodyZero LeakagePressure Rating @ 200 psig (AMERICAN = 250 psig)Reduced Wall ThicknessLighter Weight / Easier to Handle

AWWA STANDARDS

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IRON STRUCTURE

FLAKE LIKE STRUCTURE NODULAR STRUCTURE

CAST IRON DUCTILE IRON

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STANDARD CONFIGURATIONS

NRS OS&Y

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GEARS:

SPUR = Vertical BEVEL = Horizontal

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TAPPING VALVES:

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SPECIAL CONFIGURATIONS

MOV UNITS: INDICATOR UNITS:

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RW GATE VALVE - REVIEW

SIMPLISTIC DESIGN3 MOVING PARTS

• Stem• Stem nut• Wedge

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Pressure Energized Seals


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Fusion Bonded Epoxy CoatingInside and Out


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Larger than Full Nominal Waterway


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Smooth Waterway


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Two thrust washers stem collar


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High strength stem


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DI Wedge –Fully Encapsulated with EPDM Rubber


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Independent Stem Nut


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Polymer Covered Wedge Guides


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Blast Cleaning and Heating Ferrous Castings

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Robotic coating process

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Touch-Up

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Assembly and Testing

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ShallowGuide Tracks


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Wide Guide Tracks

RWGATE VALVE - REVIEW

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Suitable to mounting flushing connection


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Field InstalledFlushing Connection


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• Every Valve Test to 250 psig• Lifting devices• Integral feet for

Vertical Storage or Installation•Bevel or Spur Gearing•Sizes 2” thru 66”

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• Sizes 2” thru 66”

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EVERY VALVE IS SEAT TESTED AT 250 PSIG


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A Boltless Restrained Joint RW Gate Valve

Available in Size 16” -48”

Photo Placement Here

AMERICAN SERIES 2500 with FLEX-RING® JOINTS

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Positive Joint Restraint

Photo Placement Here

Fastite Gasket

Restraining Weld Bead

Rubber BackedFlex-Ring Segments

Fastite Gasket

Restraining Weld Bead

Rubber BackedFlex-Ring Segments


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No bolts and nuts to inventory, install, or tighten

F E A T U R E S

ValveSize

WedgeBolts

MJ TeeHead Bolts

TotalBolts

16”18”20”24”30”36”42”48”

1212141620242832

1212141620242832

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Friction Style MJ - Restrainers

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Up To Twice the Deflection of Friction Style MJ - Restrainers

Size Allowable Deflection (Degrees)

16” 3 ¾

18” 3 ¾

20” 3 ½

24” 3

30” 2½

36”- 48” 2

F E A T U R E S

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No restraining hardware to corrode


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No twist off restraining bolts to break

F E A T U R E SAMERICAN SERIES 2500 with FLEX-RING® JOINTS

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No point loads or digging into the connecting DI pipe wall


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More even distribution of thrust loads

FEATURESAMERICAN SERIES 2500 with FLEX-RING® JOINTS

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Restraining components remain protected inside valve joint

F E A T U R E SAMERICAN SERIES 2500 with FLEX-RING® JOINTS

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ASSEMBLY LOAD“RESTRAINT” FORCE OF FLEX-RING® SEPARATION THRUST

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In-Field Adaptability Available Thru 36” Diameter

Standard Fastite®

Gasket

American Flex-Ring®

Ductile Iron Pipe Bell

Field Flex-Ring®

Used when Spigot Weld Bead

is unavailable

AMERICAN SERIES 2500 with FIELD FLEX-RING® JOINTS

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Quality You Can Count On

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American Flow ControlFor Your Next Project Choose

DOING IT THE RIGHT WAY FOR OVER 100 YEARS

p: 800-579-3500www.american-usa.com

a discussion on the use of rw gate valves

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