Flowserve TX2 User Manual

Installation, Operation, and Maintenance

Breaking the Barriers

Flowserve TX2

Triple Offset Butterfly Valves

FCD-DVENIM0400-00

Flow Control Division

TABLE OF CONTENTS

SECTION

TITLE

PAGE

FOREWORD

THEORY OF OPERATION

PRELIMINARY PRECAUTIONS

III

INSPECTION

TOOL REQUIREMENT

STORAGE

INSTALLATION

VII

STEPS OF INSTALLATION

VIII

FLANGE CONNECTING AND BOLTING

REMOVAL PROCEDURE

LUBRICATION SCHEDULE

STUFFING BOX MAINTENANCE PROCEDURE

XII

CHANGE OF DISC AND BODY SEAT

XIII

CHANGE OF GASKET

XIV

ASSEMBLY AND DISASSEMBLY

PARTS AND SERVICE

XVI

TROUBLESHOOTING GUIDE

XVII

CAUTIONS

XVIII

PARTS LIST AND MARKINGS

FOREWORD

Flowserve Corporation, Flow Control Division, has established this Installation, Operating and maintenance Manual to facilitate field installation, operation and repair of Flowserve TX2 Triple Offset Butterfly Valves

It is recommended that questions or concerns involving the processes described in this manual be directed to the local Sales Representative of Flowserve Corporation. Only Flowserve replacement repair parts should be used. Part numbers referenced in the following sections are available from Flowserve Corporation, Flow Control Division.

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Preferred direction of flow

SECTION I THEORY OF OPERATION

The valve design is based on a double eccentric geometry of the disc rotating center, utilizing a floating radius machined seal ring, in conjunction with an inclined cone seating surface of body. This design makes the disc cam back and away from body seat, eliminating wear between the seat and seal ring. It also compensates for deviations of the geometry caused by temperature or tolerance changes. (Fig. 1)

The disc seal of valve deflects from its regularly circular shape to an elliptic form when it reaches the closed position. This matches the inclined cone of body seat geometry, creating the sealing between disc seal and body seat. Dimension changes due to temperature fluctuations cause the seal ring to adjust its seating position within the inclined cone geometry, thus maintaining a positive seal as usual.

Due to the unique conical surface of the valve, there is a “preferred” and “non-preferred” flow direction. The preferred flow direction would be with the shaft upstream and the direction is marked on the body with a directional arrow. The shaft side is referred to as the high pressure side of the valve.

SECTION II PRELIMINARY PRECAUTIONS

FOR SAFETY, FOLLOW THESE CAUTIONS BEFORE INSTALLING, REMOVING OR DISASSEMBLING YOUR VALVE.

1. MUST KNOW WHAT MEDIA IS IN THE PIPELINE.

2. MAKE SURE THE LINE IS DEPRESSURIZED.

3. USE PROTECTIVE CLOTHING AND EQUIPMENT TO AVOID INJURY. KEEP HANDS AND OTHER BODY PARTS OUT OF THE VALVE.

4. ALWAYS ENSURE THE VALVE IS IN THE FULLY CLOSED POSITION BEFORE INSTALLATION, REMOVAL OR DISASSEMBLY.

5. ENSURE THAT FLANGE FACES ARE CLEAN BEFORE INSTALLATION IN PIPELINE.

Fig. 2

SECTION III INSPECTION

1. Before installation of the valve into the piping system, visually inspect the valve to determine

if any damage has occurred during shipping. Particularly, inspect the actuator, shaft, valve interior, valve body and flanges. For proper operation of the valves, the seat and disc seal must be undamaged and free of foreign material. If other than superficial damage is discovered, contact Flowserve immediately, indicating the location and extent of the damage found.

2. If it is necessary to clean the valve, use a soft cloth and mineral spirits, or an equivalent

solvent. All rust preventive should be removed before installing your valve.

SECTION IV TOOL REQUIREMENT

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There are no special tools required for installation and maintenance that are not commercially available. Any lifting devices used to move the valve into a desired position shall be of sufficient size to support the weight of the valve and actuator assembly. Nylon slings secured around the valve bearing areas are recommended to reduce the possibility of mechanical damage occurring to the valve body and actuator. The assembly should never be lifted by the actuator. (Fig.2)

WARNING

NEVER pass a lifting device through the valve port or severe damage may occur.

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Fig 3

Fig 4

SECTION V STORAGE

When the valve is not put into immediate service, it is required that the valve be stored in a heated building that is fire resistant, weather tight and well ventilated. Storage area shall be situated and constructed so that it will not be subject to flooding or the presence of any corrosive chemicals. Flowserve recommends that all valve actuators be cycled approximately every 60 days or as required by the manufacturer of the actuation system. Any spare parts for the valve shall be stored in the original packaging and under the same conditions as the valve will be stored. For storage greater than 4 months, the storage container should be inspected every four (4) months to ensure it is in good condition, and any additional protective coverings or materials are in working order. Ensure all parts are plugged, and bare metal is covered with a suitable rust inhibitor.

SECTION VI INSTALLATION

The valve must be installed so that pipeline stresses are not transmitted to the valve body. Despite its solid manufacture, such stress may affect valve operation. If pipeline stresses are severe, they should be cushioned by expansion joints or compensators. If supports are necessary for the valve, they should only support the dead weight of the valve and should not serve as base points for the pipeline.

SECTION VII STEPS OF INSTALLATION

7.1. All valve s must be in full closed position during installation or removal. It is not necessary to torque seat the valve, but the disc travel must be restricted to prevent damage.

7.2. Please be sure there is no foreign material and that it is clean inside of the pipe and valve.

7.3. The shaft side of the disc is considered the high-pressure side of the valve, (as indicated on the drawings by a flow arrow) meaning the best closure performance is obtained on this side of the valve, and a determination as to the best installation should be made, to utilize this feature. This may not necessarily be the normal flow direction of the system. (Fig.3).

7.4. Please install the valve stem horizontally as (Fig.4), thus could prevent sand and some chips from collecting around bottom bushing and seat. Such reside could damage the valve.

Fog 4

Fig 4

Fig 6

4.5. Install valve and gaskets into pipeline as (Fig.5).

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Fig 5

4.6. Make sure that the valve is installed concentrically between the flanges in order to could prevent the disc from being damaged by interference with the flange and pipeline (Fig.6)

4.7. The typical installation for a butterfly valve connected to an elbow would be to align the shaft axis to allow equal flow on each side of the shaft, minimizing dynamic torque requirements for the valve. (Fig.7) Excellent Good Not recommended

Fig 7

4.8. Always use an extension tube between wafer check valve and butterfly valve. Never connect them directly. (Fig.8)

Fig 8

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Bolt size

Torque

(ft-lb)

(Nm)

5/8” (M16)

110

150

3/4” (M20)

200

270

7/8” (M22)

320

434

1” (M26)

480

650

1-1/8”(M28)

600

815

1-1/4”(M32)

840

1140

SECTION VIII FLANGE CONNECTING & BOLTING

8.1. Keep valve protection boards until installation.

8.2. Make sure the material and size of gaskets could be suitable for the service. Ensure that the faces of flange and valve are smooth and flat. Sandpaper the faces if there are any defects.

8.3. Check that all the bolts and nuts are in good condition.

8.4. Apply lubricant such as Molybdenum to all the bolts and nuts before fixing them.

8.5. The pipe support(s) may now be required to be partially disengaged. A determination as to pipe flange alignment and space between the pipe flange and the valve face must be made at this time. The optimum spacing would be such as to only allow the flange gasket to be installed, at the maximum, and the flange bolt holes would be concentric.

8.6. The opposite connecting pipe flange face may not be more than 1/4 inch away from the valve flange face. Alternate methods of alignment, other than using the flange bolts, must be utilized to conform with this requirement.

8.7. Install all studs, maintaining uniform clearance between the studs and the mating bolt holes. Additionally the studs spanning the valve assembly should not contact the valve body.

8.8. Seat the flange by alternate tightening of four equally-spaced flange bolts no more than 1/4 turn per bolt, until the flange faces seat. During this operation, it is advisable to continually check the relative distance between the flange faces. Torque the bolts to approximately 25% of the final torque value (see table 1).

8.9. Inspect the remaining bolts and assure correct alignment. Tighten to the same level as the first four bolts.

8.10. Complete the tightening of all flange bolting in a minimum of four increments to the final determined torque value.

8.11. Test cycle the valve to be sure that there is no interference or binding.

12. Maximum Torque of Flange Bolt

Table 1. ※Actual torque shall depend on gasket type, consult gasket manufacturer.

BOLT TIGHTENING SEQUENCE (Fig.9)

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Fig 10

SECTION IX REMOVAL PROCEDURE

To remove your valve from the pipeline, please follow these simple steps: Ensure that the valve is in the closed position. Ensure that the line is depressurized. Use protective clothing and equipment to prevent injury. If your valve is equipped with a fail-open actuator, manually close the valve or disconnect the actuator then close the valve before removal. Attach nylon slings to the body shoulders of the valve and around the body of the actuator. Remove the bolts holding the valve to the pipeline flanges.

SECTION X LUBRICATION SCHEDULE

Flowserverecommends that your valve be inspected at least every three months to determine lubrication and other maintenance requirements dependign upon your specific service conditions.

SECTION XI STUFFING BOX MAINTENANCE PROCEDURE

Routine maintenance of the stuffing box consists of tightening the packing gland periodically. If leakage around the stuffing box is discovered, first tighten the hex-nuts on the gland follower (more than 2/3 compression) as this may reduce packing life. If the leakage still persists, replace the packing according to the following procedure. (For clarity, the actuator and bracket are not shown in the following diagrams. It is not necessary to remove the actuator or bracket before performing this procedure).

11.1 In order to gain access to the packing, remove the gland follower and slide it up to the actuator. See the diagram below:

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