Flowserve V-377 R4 Edward Valves Manuel d'utilisateur

Edward ValvesMaintenance Manual forEdward Pressure-Seal ValvesV-377 R4

10Flow Control DivisionEdward ValvesPressure-Seal Gasket LeakEdward valves have been produced withtwo types of pressure-seal gasket: Earliervalves had

11Flow Control DivisionEdward ValvesLeakage of steam through a valve that isbadly steam-cut has a whistling orsonorous sound. If the valve is only sli

12Flow Control DivisionEdward ValvesBody Wall LeakThis is a visual leak through the body wall,welding end or end flanges and may be theresult of a shr

13Flow Control DivisionEdward ValvesVALVE BODY REPAIRSBody Bore Gasket Seal Area Repairwith Metal Gasket OnlyPressure-seal valves made prior to 1952we

14Flow Control DivisionEdward Valves2. Heat the body area adjacent to theguide rib to approximately 200°F.This can be done locally with an oxy-acetyle

15Flow Control DivisionEdward ValvesFor smaller size valves, a driving han-dle can be easily made of 3/8” diame-ter wire bent as per Fig. B on page 17

Flow Control DivisionEdward ValvesRepair Procedures (continued)line scale or other foreign matter that hasinadvertently gotten into the line. Upon dis

17Flow Control DivisionEdward ValvesField Repair EquipmentAvailable from the Edward Manufacturingplant in Raleigh, N.C., are some basictools for repai

18Flow Control DivisionEdward ValvesIntroductionStep-by-step disassembly procedures aredescribed for all types of Edward pressure-seal bonnet valves,

19Flow Control DivisionEdward ValvesFor Method 1, first remove the operator-yoke assembly combination as describedin “Procedure for Removing Valve Ope

2Flow Control DivisionEdward ValvesKey to Illustrations...3Pressure-Seal Valve Figure Numbers...

20Flow Control DivisionEdward ValvesNon-Ball Bearing Type ImpactorHandles and HandwheelsAll have 12, 14, 16, 20, 26, or 30 inchdiameters. See Illustra

Flow Control DivisionEdward ValvesDisassembly Procedures for Impactor Handles & Handwheels (continued)BEARING NUTBALL BEARINGGEAR COVER ASSEMBLY(V

22Flow Control DivisionEdward ValvesEdward pressure-seal valves use varioustypes of Limitorque operators, dependingupon the size and pressure class, w

23Flow Control DivisionEdward Valves4. Lift the operator up and completelyoff the stem and stem key or the yokebushing splines.5. Position the operato

Limitorque Limit Switch and TorqueSwitch Setting ProceduresThe following descriptions apply only toLimitorque valve controls. If another typevalve con

25Flow Control DivisionEdward Valves7. Connect the electric current andcheck this setting as follows: a. Run the valve to mid-position byhand.b. Press

26Flow Control DivisionEdward Valves3. Move the socket head adjustingscrew (H) in for light seating.4. Close the valve by the motor and testfor tightn

AREA 2This procedure describes the method for: 1) Removing the yoke assembly from thevalve, after the operator has beenremoved (procedure described el

28Flow Control DivisionEdward ValvesRevolving Stem Valves – Valves withType II Bonnets See Illustration No. 22 on page 30.1. The manual or Limitorque

AREA 1 & 2This procedure describes the method forremoving the operator, either handwheelor Limitorque type, and yoke assemblyfrom the valve as a u

3Flow Control DivisionEdward ValvesTable of Contents (continued)Illus No.Title PageI Pressure-Seal Bonnet Type I...42 Pressure-Seal

Non-Revolving Stem Valves withType II, III, or IV BonnetsSee valve Illustrations No. 23 (page 31),No. 24 (page 34) and No. 27 (page 39).See Handwheel

AREA 3(For a definition of Area 3, see page 18)(See Illustration No. 5 on page 11 for anexplanation of valve parts nomenclature.)Step-by-step disassem

32Flow Control DivisionEdward Valves6. Partially back off the remaining bon-net stud nuts. Raise the yoke, andinsert uniform shims in at least threepl

33Flow Control DivisionEdward ValvesIn larger sizes where this assembly istoo heavy to manhandle, remove thecover/cover retainer and install aneyebolt

Flow Control DivisionEdward Valves19. Screw 1/2”-13 bolts (3/8”-16 onsizes 5” and smaller) into the thread-ed bosses or nuts provided in the pis-ton.

Flow Control DivisionEdward Valves11. With a chain hoist mounted in linewith the stem and fastened to the eye-bolt, pull the stem into firm contact at

36Flow Control DivisionEdward Valves22. On stop valves, the disk and disk-nutassembly is attached to the stem. Onstop-check (non-return) valves, the p

37Flow Control DivisionEdward Valves21. On stop valves, the disk and disk-nutassembly is attached to the stem. Onstop-check (non-return) valves, the p

38Flow Control DivisionEdward ValvesType III Pressure-Seal Bonnets –Tilting Disk Check Valves Sizes 6”and larger.See Illustration No. 26 on page 38.As

14. Lift out the cover assembly. During thisprocess, mark the spacer ring andpressure-seal gasket at points (otherthan the sealing surfaces) correspon

4Flow Control DivisionEdward ValvesThe procedure to be followed in makingthe repair is then explained. This includesnormal valve maintenance as well a

40Flow Control DivisionEdward Valves3. Remove the bonnet retainer ring capscrews. Due to space limitations, aspecial tool may have to be used.Make it

41Flow Control DivisionEdward Valvesbore and lift out the piston, beingcareful not to mar any sealing sur-faces such as the body pressure-sealarea or

42Flow Control DivisionEdward ValvesIt is important to determine that the newcomposite pressure-seal gasket, the bonnetand the body sealing area are i

43Flow Control DivisionEdward Valves8. Initially compress the pressure-sealgasket, making sure that the bonnetdoes not cock in the body.9. While maint

44Flow Control DivisionEdward Valveswrench on the O.D. Use a reason-able length of bar stock, or ade-quate size strap wrench, so the nutis firmed up w

45Flow Control DivisionEdward Valves6. Open valve to the backseat with thebonnet studs loose. Use the hand-wheel to back-seat the valve 2 or 3light ta

46Flow Control DivisionEdward Valves8. Retighten the bonnet retainer capscrews in accordance with the torquevalues shown on page 10. All screwsmust be

47Flow Control DivisionEdward Valves8. Insert the gasket retainer segments inthe body groove.9. Install the cover retainer.10. Lift the cover, pressur

48Flow Control DivisionEdward ValvesGeneral InformationWARNINGEdward valves are not provided with apressure relief device. A pressure reliefdevice mus

49Flow Control DivisionEdward ValvesFigure 290° Bonnet Piston-Lift Check ValvesMaximum Valve Orientation LimitsFigure 1 45° Inclined Bonnet Piston-Li

5Flow Control DivisionEdward ValvesDescription of Pressure-Seal Bonnet Types – Type IIType IIIllustration No. 2Pressure-Seal BonnetFig. No. Pressure R

50Flow Control DivisionEdward ValvesSupplementary Repair InformationIn analyzing valve trouble in the field, it isimportant to consider the following

Flow Control DivisionEdward ValvesFlowserve Corporation has established industry leadership in the design and manufacture of its products. When proper

6Flow Control DivisionEdward ValvesType III also uses the three-piece pressure-seal construction but combines it with thebasic pull-up bonnet. This de

7Flow Control DivisionEdward ValvesDescription of Pressure-Seal Bonnet Types – Type III and Type IVFig. No. Pressure Rating Type of Valve Size4017 and

8Flow Control DivisionEdward ValvesPacking Chamber LeakWhere moisture appears or actual drippingoccurs at the packing chamber around thestem, gland or

9Flow Control DivisionEdward ValvesService Problems (continued)Initial FinalFigure Numbers Size Torque Torque2.5 27 83278604, 605, 606, 607 4 41 12616