Weco Butterfly Valve Actuators

A v a i l a b l e f r o m s t o c k i n t h e s i z e s , s t y l e s , a n d m a t e r i a l s y o u n e e d

Weco® Butterfly Valvesand Actuators

Field-proven dependability you demandquality service you deserve

Catalog BV-9/98

Choice of operators,including gearoperators, pneumaticactuators, vaneactuators, standardand throttling handles.

Hex drive providespositive discmovement withoutin-line pins, screws,or bolts. All stem partsare out of the flowpath.

Ribbed seat faceeliminates the needfor flange gaskets,insures a leak-proofinstallation.

Streamlined discminimizes turbulenceand pressure drop forflow efficiency.

Dual stem with upperand lower tangentialpins allows a self-centering disc. Thisdesign provides equalsealing pressure 360 °around the disc, assuringpositive shut off andexlending service life.

Triple seat design(O-ring, undersizedstem holes in seat,corresponding flats onseat and disc hubs)provides three,completely independentseals, isolating thestem from line fluid.

Patented elastomerseat with two-piece,hard phenolic back-upeliminates seat walkingand allows the seat toexpand under pressure,making the valve bodythe pressure containingcomponent.

Weco Model 12 Butterfly Valve

Weco butterfly valves have been solving fluid control problemsin oilfield and general industrial applications for over 20 years.Today’ s FMC is putting that experience to work for you in moreways than ever before...meeting your changing needs withdependable Weco butterfly valves, operators, and actuators.

Field-proven features plus “new technology”in every valve

When you specify W eco butterfly valves, you get the ultimatein dependable, economical flow control. That’ s because FMCcombines the field-proven features and benefits of W eco valves(shown on facing page) with technical advances in engineering andmanufacturing.

From computer -aided engineering (CAE) and computeraideddesign/computer -aided manufacturing (CAD/CAM) to automatedmanufacturing cells and high-density warehouse systems, today’ sFMC is putting “new technology” into every W eco butterfly valve.Technology that is helping FMC improve deliveries and provideunsurpassed service. The result: You get the field-proven depend-ability you demand and the quality service you deserve with everyWeco valve.

Complete range of sizes and stylesMeeting your “demands” means having the butterfly valves

you need, when you need them. W eco butterfly valves are availablefrom stock in 2- through 24-inch sizes and can handle workingpressures to 175 psi. W afer, notched, and lugtype body styles makeit easy for you to find the valve that meet your requirements for newor existing piping systems. Short and long neck models and stemextensions are available.

Regardless of size or style, W eco butterfly valves provideoutstanding flow characteristics due to low profile disc design.

ContentsWeco Model 12 and 12N V alves ................................................. 2Weco Model 22 V alves ............................................................... 4Weco Model 22L Valves .............................................................. 6Weco Standard and Throttling Handles ........................................ 8Weco Gear Operators and Stem Extensions .................................. 9Weco Pneumatic Actuators ........................................................ 10Weco Vane and Other Actuators ................................................. 11Weco Sizing Information ............................................................ 12Ordering Information ................................................................. 16Terms and Conditions ................................................................ 17

How today’s FMC is meeting your -”demands” withdependable Weco butterfly valves, operatorsand actuators

Materials to meet your service requirementsTo insure that FMC meets your exacting service requirements,

Weco butterfly valves are available in a wide variety of materials.Valve bodies, discs, stems, and seats all can be individually matchedto your specific operating conditions, including: temperature range,type and concentration of fluid, and various flow conditions. AllFMC materials of construction meet ASTM and AISI standards.

Wide choice of operators and actuatorsAll models and sizes of W eco butterfly valves can be

equipped with Weco operators and actuators as well as otherbrands of actuators. You can choose from standard and throttlinghandles, gear operators, chain-wheel operators, pneumaticactuators, vane-type actuators, special controllers, and positionersas required.

Fast, simple field repairWeco butterfly valves provide dependable service under the

harshest of applications. Because there are no in-line screws, pins,or bolts, little or no maintenance is required. If the valve shouldneed repair , it can be completely reconditioned in the field usinginterchangeable, stock parts. No special tools are needed.

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Model 12

Short neck, wafer -style body; 2- through 16-inch sizes

Recommended service and special featuresGeneral on/off and throttling services from 1 mm absolutevacuum to 175 psi (12 bar) cold working pressure at temperaturesfrom -40 °F to 300 °F, depending on seat material; 14- to 16-inchsizes limited to 150 psi (10 bar) cold working pressure; AllModel 12 valves are self-centering and mount between 125 lbor 150 lb ANSI flanges; Model 12 bodies can be notched to fitbetween special flanges. Special materials are available to meet285 PSIG-consult factory for details.

Model 12N

Short neck, notched body; 2- through 6-inch sizes

Recommended service and special featuresGeneral on/off and throttling service from 1 mm absolute vacuumto 175 psi (12 bar) cold working pressure at temperatures from-40°F to 300 °F, depending on seat material; Standard Model 12Nis notched to fit between light weight flanges.

Weco Model 12 and 12N Butterfly Valves

Dimensions

2

Butterfly Valve Components

Weco Model 122- to 14-inch sizes

Weco Model 12 N2- to 6-inch sizes

Weco Model 1216-inch size

Materials of Construction

3

Model 22

Long neck, wafer body; 2- through 12-inch sizes

Recommended service and special featuresGeneral on/off and throttling services from 1 mm absolutevacuum to 175 psi (12 bar) cold working pressure re at temperatures from - 40 °F to 300 °F, depending on seat material; AllModel 22 valves mount between 125 lb to 150 lb ANSI flanges;Neck length allows for 3-inches pipe insulation.

Weco Model 22 Butterfly Valves

Dimensions

4

Weco Model 222- to 12-inch sizes

Materials of Construction Butterfly Valve Components

5

Model 22L

Long neck, lug body; 2- through 24-inch sizes

Recommended service and special featuresGeneral on/off and throttling services from 1 mm absolutevacuum to 175 psi (12 bar) cold working pressure at temperaturesfrom -40 °F to 300 °F, depending on seat material; T apped lugsallow independent upstream or downstream bolting to 125 lbor 150 lb ANSI flanges; Neck allows for 3-inches pipe insulation.Special materials are available to meet 285 PSIG-consult factoryfor details.

Weco Model 22L Butterfly Valves

Dimensions

6

Weco Model 22L2- to 14-inch sizes

Materials of Construction Butterfly Valve Components

Weco Model 22L16- to 24-inch sizes

7

Standard Handles

2- through 12-inch valve sizes

Recommended service and special featuresOn/off valve operation from 1 mm absolute vacuum to 175 psicold working pressure; Positive-stop gripper with integrallocking lug insures full-open or full-closed operation; Model 12and 12N valves have a detent plate which bolts on the valvebody in each of four quadrants; Model 22 and 22L valves havepre-notched top flange with on/off detent positions; Gearoperator recommended for 8-inch size valves and above.

Throttling Handles

2- through 12-inch sizes

Recommended service and special featuresThrottling applications from 1 mm absolute vacuum to 175 psi(12 bar) cold working pressure; Notched detent plate andpositive-stop gripper with locking lug insures positive locking inany of 10 positions from fuII open to fuII closed; Detent platebolts on the valve body in each of the four quadrants; Gearoperator recommended for 8-inch size valves and above.

Weco Standard and Throttling Handles

Dimensions

8

Gear Operators

2- through 24-inch valve sizes

Recommended service and special featuresWeatherproof, worm gear operator for manual on/off orthrottling service; Operator has 90' travel ar c with internaltravel stop screws for a plus or minus 20' adjustment at eitherend of the travel; Mounts on valve in any quadrant; Chain-wheel attachment available; Hand-wheel shaft extensionsavailable.

Gear Operators and Stem Extensions

Dimensions

Stem Extensions

2- through 24-inch valve sizes

Recommended service and special featuresExtends valve operating shaft, allowing service in applicationswhere the valve is inaccessible; Extension is totally sealed forsubmersible or buried service; Actuator mounting dimensionsare identical to corresponding valve.

Dimensions

9

Pneumatic Actuators

Double-acting or fail-safe spring return actuator for2- through 12-inch valve sizes

Recommended service and special featuresPatented pneumatic actuator for on/off valve operation; FulI90° operation with a minimum of 30 psi air , no adjustmentsrequired; T otally enclosed and sealed actuator has integraldisc position indicator and manual override; Exclusiveinvolute drive provides constant tor que throughout full 90 °travel, eliminates shaft side loads, and allows for precisedisc positioning; Mounts directly to W eco butterfly valveswithout special adapters or mounting hardware.

Weco Pneumatic Actuators

Dimensions

10

Vane Actuators

Quarter -turn, double-acting actuator for 2- through 6-inchvalve sizes

Recommended service and special featuresCompact pneumatic actuator for on/off valve operation; Actuatormounts directly to W eco butterfly valves in any quadrant; Theonly moving part, the vane, is cast integral to the shaft forsturdiness; No field lubrication required; Fully repairable on-line.

Weco Vane and Other Actuators

Other Actuators

Air CylinderTotally enclosed and sealed pneumatic actuator for on/off orthrottling applications on 2- through 24-inch valve sizes; 2- to5-inch and 12- to 24-inch sizes require 60 psi air , 6- to 10-inchsizes require 80 psi air; Mounts to W eco valve top flange usingadapter; Internal adjustable stops, disc position indicator andmanual override are standard.

ElectricWeco 2- through 24-inch valves may be equipped with electricactuators for on/off, throttling and automated services. Mountingbrackets are required.

Tee LinkagesTee linkages are available for operation of two valves simulta-neously with one actuator for dividing or mixing flow througha tee. Can be used with on-off or throttling actuators.

Other ActuatorsWeco butterfly valves can be equipped with other types ofactuators. For a quote on other actuators, consult the factory .

Dimensions

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Non-Compressible Fluids

Use the foIlowing equations for sizing vaIves handIing Iiquids(A) (B) (C)

Cv = Q Q = C v ∆P = G

Where: Q = Flow in gallons per minute (gpm)∆P = (PI - P2) Pressure Drop (psi)P1 = Inlet Pressure (psia)P2 = Outlet Pressure (psia)G = Specific Gravity of Liquid (W ater = 1.0)Cv = Valve Coefficient (Refer T o Appropriate T able)

The equations Iisted above are the basis for the WECO sizingnomogram. The nomogram is a method of solving the equationsabove quickly and simply when the service fluid is water .

Weco Butterfly Valves Sizing InformationExampleGiven: A 6" WECO Butterfly V alve is to be installed in a

line handIing 500 gpm of water .Find: Maximum pressure drop across the valve when in

the full open and 60 ° open positions.Solution: This problem may be solved using the nomogram or

equation (C).

First Using the Nomogram: Enter nomogram on right side fora flow rate of 500 gpm. Draw horizontal line until it intersectsthe 6" valve line. From this point draw a vertical line until itintersects the 90 ° open line. Project line horizontally to the leftand read ∆Pof .061 psi. Now , using same procedure as above,extend vertical line to 60 ° open line and project horizontally tothe left to read ∆Pof .67 psi for 60 ° open.

Using Equation (C): Pressure Drop = ∆P = G

Where:Cv = 2020 @ 90 ° open (from tables)G = 1.0 (Water)Q = 500 gpm

∆P = 1.0 = .0613

Now: Cv = 61O gpm @ 60 ° open, and ∆P= 1.0 = .672

[ ]QCv

2

Cv ValuesResilient Seated BFV’S — All Models

[ ]500610

2[ ]500

2020

2

√ G∆P √ ∆P

G [ ]QCv

2

12

Nomogram for Sizing Weco Butterfly Valves

13

Required Operating Torques:

There are three tor ques to be considered when selecting theproper actuator for a butterfly valve.

(1) Seating Torque - The tor que required to displace aresiIient seat and effect shutoff

(2) Bearing Torque - The tor que required to over comefriction for ces on the valve shaftbearing surfaces

(3) Dynamic Torque - Torque due to fluid for ces whichtend to close the valve.

The tor ques for resilient seated valves tabulated in this sectionare the sum of (1) and (2) above for various shutoff pressures.These tabulated values include a safety factor lar ge enough toinsure proper valve operation in most general butterfly valveapplications. Where unusual service conditions exist (such aslikelihood of seat swelling, or low and high temperature seathardening), an additional safety factor may be applicable.

Dynamic Torque

Dynamic tor que is tor que on the valve shaft due to the fluidforces on the valve disc. This tor que is a function of valvediameter, pressure drop, and a tor que coefficient (C t) whichvaries with angle opening. T orque is calculated by the equation:T = CtD

3∆P Where: T = Dynamic tor que (in-lb)D = Valve Dia. (in.)Ct = Dynamic tor que coefficient

(see table below)

Dynamic tor que is not usually of major concern in resilientseated butterfly valves unless the line velocity exceeds 20 fps. If linevelocity exceeds this, a check should be made to insure that actuatoroutput exceeds the calculated dynamic tor que. Dynamic tor queshould be checked at 80 ° open for on-off applications.

Dynamic tor que is of prime consideration in situations whereline velocity is not recovered downstream of the valve. Thissituation exists on installations where there is an unlimited sour ceand less than 6 diameters of pipe downstream of the valve. If avalve dischar ges to the atmosphere, the pressure drop across thevalve will be equal to the height of water above the valve for allangles of valve opening. This pressure drop must not exceed thepressure drop tabulated in Maximum ∆P vs. Angle Opening Tablesfor any angle. If it does, provisions must be made for velocityrecovery by adding downstream piping.

Actuator Sizing For Tee Linkages

For standard tee linkage applications where one actuator operatestwo butterfly valves of the same size with one valve opening as theother valve closes, the actuator sizing will be the same as for asingle butterfly valve application. For the actuator sizing for othertandem linkage applications, consult the factory .

Low-Torque Valves

Under cut discs are available for butterfly valve applications thatrequire lower seating tor ques. For complete information, consultfactory .

Actuator Sizing Information

14

Minimum air pressure for Weco pneumatic actuators operatingWeco valves at 175 psi rated pressure

15

Weco butterfly valves are available from stock in a variety ofmodels, sizes, pressures, and materials. V alve bodies, discs,stems, and seats all can be individually matched to yourspecific operating conditions, including: temperature range,type and concentration of fluid, areation, and various flowconditions. All FMC materials of construction meet ASTMand AN standards. (For a complete listing of materialrecommendations for handling over 375 different products,refer to the W eco Butterfly V alve Material Selection Guide.)

To insure that you get the right W eco valve for yourapplication, it is necessary to include the following informationwhen placing an order:I. Weco model number2. Valve size in inches3. Materials of construction4. Product being handled (if acid, give concentration)5. Cold working pressure and maximum pressure6. Operating temperature, including minimum and maximum

temperature7. Type of handle, operator , or actuator

NOTES:

Ordering Information

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1. Payments are to be made in U.S. funds unlessotherwise specified; Payment terms: Net 30 days.Prices invoiced will be those in effect at time ofshipment. All prices apply F.O.B. point ofmanufacture. Seller reserves the right to place aservice char ge on past due accounts at the highestrate permitted by law .

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B. If in Seller’s opinion repair or replacement willnot remedy a claimed product deficiency , or if aproduct of Seller ’s manufacture does not complywith the description or specification set forth onSeller ’s Order Acknowledgment, Seller ’s liabilityshall be limited to repayment of any amounts paidon the pur chase price, cancellation of the orderand acceptance of the product F .O.B. point ofmanufacture, however , if the product has been inuse for a period in excess of 30 days, Seller reservesthe right to make a reasonable depreciation char gefor such use.

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at its option, may either (a) procure for the Buyer alicense to sell and/or use the product; (b) modifythe product so as to make it noninfringing withoutseriously impairing its performance; (c) replace theproduct with a product that is substantially equalbut noninfringing; or (d) accept the return of theproduct from the Buyer , in which event the Sellershall refund to the Buyer the pur chase price lessdepreciation at the rate of 15 per cent per year(measured from the date Seller shipped theproduct). The foregoing sets forth the Seller ’s entireliability to the Buyer for patent infringement basedon the possession, use or sale of the product by theBuyer; it being understood and agreed that theaforesaid obligations of the Seller do not extend to,and are not applicable in the case of, any patentinfringement claims directed to a method or aprocess.

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13. It is understood that Seller has relied upon datafurnished by and on behalf of Buyer with respect tothe safety aspects of the products suppliedhereunder and/or representations by or on behalf ofBuyer that such products will not be applied orused by Buyer or its customers in such a way as todetract materially from their safety in use,including, without limitation, in the manufacture ofa product of which such products will be a part,and that it is Buyer ’s responsibility to assure thatsuch products, when installed and put in use, willbe in compliance with safety requirements fixed byapplicable law and will be otherwise legallyadequate to safeguard against injuries to persons orproperty.BUYER HEREBY AGREES T O INDEMNIFY, HOLDHARMLESS AND DEFEND SELLER, AND ITSDIRECTORS, OFFICERS, EMPLOYEES ANDAGENTS AGAINST ANY AND ALL LOSSES, COST ,DAMAGES, CLAIMS, LIABILITIES OR EXPENSES,INCLUDING, BUT NOT LIMITED TO, REASONABLEATTORNEY’S FEES, ARISING OUT OF ANYINJURY TO ANY PERSON OR DAMAGE T O ANYPROPERTY CAUSED BY THE INADEQUACY INTHE PRODUCTS SUPPLIED HEREUNDER OF THESAFETY FEATURES, DEVICES OR CHARACTERISTICSSPECIFIED HEREIN, OR IN THE INSTALLA TION,USE OR OPERA TION OF SUCH PRODUCTS,EXCEPT CLAIMS SOLEL Y FOR REPAIR ORREPLACEMENT OF DEFECTIVE P ARTS COVEREDBY THE WARRANTY SET FORTH IN PARAGRAPH3 HEREOF.

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Order Terms and Conditions

©Copyright 1997, FMC CorporationPrinted in U.S.A., EW 5.0M 9-98

FMC CorporationFluid Control Division

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