A61D Valve Instruction Manual

Instruction Manual Form 5641 April 2000

Design A61D TriAx

Design A61D TriAx Triple Offset High Performance Butterfly Valve Contents Introduction

............................... 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Installation

................................. 2

Maintenance

...............................

Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . .

Stopping Leakage . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the Seal Ring . . . . . . . . . . . . . . . . . . . . . .

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the Valve Disk, Shaft and Bearing . . . .

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting the Actuator . . . . . . . . . . . . . . . . . . . . . . .

Changing Actuator Mounting Style . . . . . . . . . . . . .

3 3 3 3 4 4 4 5 5 6 6 6

Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Parts Reference

........................... 7

Introduction Scope of Manual

W7913 / IL

Figure 1. Design A61D TriAx

This instruction manual provides installation, operation, maintenance, and parts ordering information for Design A61D TriAx valves. Refer to separate manuals for information concerning the actuator and accessories.

The Design A61D TriAx High Performance Butterfly Valve is a flanged (figure 1) triple offset HPBV. Suit-

able for a broad range of industrial and general service applications, this valve mates with the Type 1035 rack and Pinion or Bettis Scotch Yoke actuators to provide on-off service.

D102726X012

Description

Design A61D TriAx Table 1. Specifications

Valve Sizes(1)

Maximum Temperature Capabilities

J 3, J 4, J 6, J 8, J 10, J 12, J 14, J 16, J 18, J 20, and J 24 inch.

End Connection Style Double flange style. Face-to-face raised-face dimensions per ANSI B16.10, API 609 Table 2B (Gate Valve) or ISO 5752 Short, API 609 Table 2C. Maximum Inlet Pressure(2) Consistent with ANSI Class 150 or 300 ratings per ANSI B16.34

WCC Carbon Steel and NACE Valve Body: –29 to 427_C (–20 to 800_F) LCC Carbon Steel Valve Body: –46 to 427_C (–50 to 800_F) Stainless Steel Valve Body: –46 to 427_C (–50 to 800_F)

Disk Rotation Clockwise (CW) to Close

1. In this manual, Valve Size refers to Nominal Pipe Size.

2. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.

3. Shaft diameter and spline end must match available shaft diameter of actuator.

Only personnel qualified through training or experience should install, operate, and maintain this valve and related equipment. If you have any questions concerning these instructions, contact your Fisher Controls sales office or sales representative before proceeding.

Installation WARNING To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve assembly where service conditions could exceed the limits given on the appropriate nameplates, or the mating pipe flange rating. Use pressurerelieving devices as required by government or accepted industry codes and good engineering practices.

CAUTION When ordered, the valve configuration and construction materials were selected to meet particular pressure, pressure drop, temperature, and controlled fluid conditions. Since some disk body/ trim material combinations are limited in their pressure drop and temperature range capabilities, do not apply any other conditions to the valve without first contacting your Fisher Controls sales office or sales representative.

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Key numbers in this procedure are shown in figure 2 unless otherwise indicated.

A Design A61D TriAx valve is normally shipped as part of a control valve assembly, with a power actuator mounted on the valve. If the valve and actuator have been purchased separately or if the actuator has been removed from the valve, mount the actuator according to the Mounting the Actuator section.

1. If the valve is to be stored before installation, protect the flange mating surfaces and keep the valve body cavity dry and clear of foreign material.

2. Install a three-valve bypass around the control valve assembly if continuous operation will be necessary during installation, inspection or maintenance of the valve.

3. Check the valve for burrs and any loose material and clean if necessary.

4. Before starting the actual installation of the valve, determine the proper installation orientation of the valve disk and actuator. Determine the flow direction of the process fluid through the valve.

Note For best shutoff performance and to reduce bearing wear, it is recommended to install the valve shaft in a horizontal direction.

5. Before installing the valve, make sure the flow direction arrow cast on the valve matches the actual process fluid flow direction through the valve for the application where the valve will be installed.

6. For valves with ISO 5752 (short) face-to-face dimensions, make sure the valve disk is in the closed position.

Design A61D TriAx 7. Install the flange gaskets and insert the valve between the mating pipeline flanges. Use flat sheet gaskets compatible with the process media, or spiral wound gaskets with compression-controlling center rings.

8. Install the line bolts and nuts; then, tighten them using accepted bolting procedures. These procedures include, but are not limited to, lubricating the line bolts and hex nuts and tightening the nuts in a crisscross sequence to ensure proper gasket load.

9. Connect pressure lines to the actuator as indicated in the actuator instruction manual. When a manual actuator is used with a power actuator, install a bypass valve on the power actuator (if not already supplied) for use during manual operation.

WARNING Personal injury could result from packing leakage. Valve packing was tightened before shipment; however, the packing might require some readjustment to meet specific service conditions.

D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

D Always wear protective gloves, clothing and eyewear when performing any maintenance operations to avoid personal injury.

D The valve packing area may contain process fluids that are pressurized, even when the valve has been removed from the pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings.

Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection and replacement depends upon the severity of service conditions.

As used in these instructions, the term ‘‘actuator’’ refers to power actuators (such as pneumatic rack and pinion or scotch yoke actuators).

Packing Maintenance Key numbers are referenced in figure 2.

Stopping Leakage All maintenance procedures in this section may be performed with the valve body in the line.

If leakage around the packing gland cannot be stopped by tightening the packing flange nuts, replace the packing according to the Replacing Packing procedure.

Maintenance WARNING Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing any maintenance operations: D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve.

D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure from both sides of the valve.

Drain the process media from both sides of the valve.

D Vent the power actuator loading pressure and relieve any actuator spring precompression.

If the packing is relatively new and tight on the valve shaft, and if tightening the packing nuts does not stop leakage, it is possible that the valve shaft is worn or nicked so that a seal cannot be made. If the leakage comes from the outside diameter of the packing, it is possible that the leakage is caused by nicks or scratches on the packing box wall. Inspect the shaft and packing box wall for nicks or scratches when performing the following procedures.

Replacing Packing This procedure may be performed without removing the actuator from the valve body if adding split graphite wound packing rings as a temporary measure. However, the actuator must be removed if replacing the standard graphite packing ring set.

Removing the Packing 1. Isolate the control valve from the line pressure, release pressure from both sides of the valve, and drain the process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to

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Design A61D TriAx the power actuator, release all pressure from the actuator. Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

2. If necessary, remove the actuator mounting cap screws (key 71A). Then remove the actuator while referring to the actuator manual for assistance.

To make actuator removal easier, unload the torque on the shaft by tightening the adjustment stop. Use a wedge to separate the actuator mounting bracket from the valve flange.

3. Remove the packing studs (key 25) and nuts (key 72) and packing flange assembly.

4. Remove the old packing rings. Do not scratch the valve shaft or packing box wall. Scratching these surfaces could cause leakage.

5. Clean all accessible metal parts and surfaces to remove particles that would prevent the packing from sealing.

6. If necessary, complete the steps in the Replacing the Valve disk, Shaft, and Bearings section, and return to the Installing Packing steps below.

Installing Packing 1. Install the new indivdual packing rings (key 63) in order. Make sure split rings are arranged so that the splits do not line up to form a leak path. Then slide each ring to the maximum depth possible.

2. Install the studs (key 70), nuts (key 72), and packing flange assembly.

3. Make sure the disk is in the closed position when installing new packing parts.

4. Tighten packing flange nuts enough to stop leakage under normal conditions.

5. Mount the actuator while referring to the actuator mounting procedures of the actuator instruction manual.

6. When the control valve is being put back into operation, check the packing for leakage, and tighten the packing nuts as necessary.

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Table 2. Required Torques Fastener Size(1)

NSm

lbSft

M6X1.0

14

10

M8X1.25

27

20

M10X1.5

47

35

M12X1.75

81

60

M14X2.0

135

100

M16X2.0

203

150

M20X2.5

415

300

M30X3.5

1400

1025

1. Metric fastener specified by diameter X pitch in mm.

Replacing the Seal Ring This procedure is to be performed if the valve is not shutting off properly or if access to the seal ring is necessary. The actuator and valve must be removed from the pipeline; however, the actuator may remain mounted during this procedure.

Handle the seal ring and seat sealing surface carefully.

A new seal ring gasket is required whenever the seal ring is removed. Other parts in good condition can be re-used.

Disassembly 1. Install a three-valve bypass around the control valve assembly if continuous operation will be necessary during installation, inspection or maintenance of the valve.

2. Remove the actuator following the instructions in the appropriate actuator instruction manual.

3. With the disk (key 15) in the closed position, remove the line bolting. Then, remove the control valve from the pipeline and place the valve on a flat surface, with the flow arrow pointing down.

4. Loosen the packing so that the shaft can move freely. Rotate the valve shaft (key 16) to move the valve disk (key 15) into the fully open position.

5. Note the orientation of the seal ring (key 35). Remove the socket head cap screws (key 73C), seal ring retainer (key 36), seal ring (key 35), seal ring gasket (key 60. If the disk has a seal ring locator (key 34), it can be left in place.

6. Inspect the shutoff surface of the valve disk. If it is worn, nicked, or scratched, proceed to the Replacing Valve Disk, Shaft, and Bearings procedure. If the parts are in good shape and do not require maintenance, continue to the Assembly procedure.

Assembly 1. Check the valve for burrs and any loose material and clean if necessary.

Design A61D TriAx 2. Rest the valve body with the flow arrow pointing down. Apply lubricant to the seat sealing surface.

3. Rotate the disk assembly to the fully open position.

D For the 3- to 12-inch sizes, install the seal ring locator (key 34) and seal ring gasket (key 60). Position the seal ring (key 35) and seal ring retainer (key 36) on the face of the disk. Remember to center the seal ring on the disk along the shaft direction.

D For the 14- to 24-inch sizes, install the seal ring gasket (key 60). Position the seal ring (key 35) and seal ring retainer (key 36) on the face of the disk. Center the seal ring on the disk along the shaft direction.

4. Apply Loctite to the socket head cap screws, and in a criss-cross pattern torque them to 50%, then 75%, and finally 100% of the required torque. This will compress the seal ring gasket. When finished, loosen the cap screws until they are just finger tight.

Note Take care in the following step to not damage the seal ring. Do not force the seal ring. The initial contact of the seal ring and seat can easily damage the sealing components.

5. Lubricate the seat and seal ring surfaces. Rotate the shaft and disk into the seat by three slight rotations in and out of the seat to further center, or float, the seal ring into the seat.

Do not exert too much force. If the seal ring does not want to go into the seat, repeat step 4 to further compress the gasket. Then repeat step 5.

After the actuator has been mounted, loosen the center key fasteners and apply torque to the shaft to allow final floating of the seal ring. With the valve in the closed position, tighten the center key fasteners to the specified torques. Then cycle the valve 3 times.

Disassembly

WARNING To avoid personal injury resulting from contact with edges of the valve disk and seal ring during disk rotation, stay clear of the disk edges when rotating the disk.

To avoid damage to tools, valve parts, or other items resulting from valve disk rotation, keep tools and other property away from the edges of the disk.

To make actuator removal easier, unload the torque on the shaft by tightening the travel adjustment stop.

Use a wedge to separate the actuator mounting bracket from the valve flange.

Note Following removal of the valve from the pipeline and partial disassembly, the valve shaft may be used to remove bearings in accordance with the procedure described in step 8, below.

1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the process media from both sides of the valve. If using a power actuator, also shut-off all pressure lines to the power actuator, release all pressure from the actuator. Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

2. Remove the actuator mounting screws, and remove the actuator. If necessary, refer to the actuator instruction manual for assistance.

3. With the valve body out of the pipeline, loosen the packing nuts. If the packing is to be reused, do not remove it. However, the packing should be replaced whenever the drive shaft is removed.

4. Rotate the disk to the closed position.

Replacing Valve Disk, Shaft, and Bearings Perform this procedure to replace the valve disk, shaft, or bearings. These parts are independently replaceable; for example, installing a new valve disk does not require replacing a valve shaft, if the shaft is in good condition. Key numbers refer to figure 2.

5. Remove the center key (key 27) from the valve disk (key 15). Note the alignment of the valve disk to shaft, you will need to re-align them when re-assembling the valve.

6. Remove the packing ring, studs and nuts as described in the Replacing Packing section.

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Design A61D TriAx WARNING To avoid personal injury or damage to tools, valve parts, or other items and disk damage resulting from the valve disk falling from the body, support the disk to prevent it from falling as the shaft is being removed.

7. Pull the shaft (key 16) from the valve body. If the shaft cannot be removed by hand, drive it out with a hammer and large drift/rod.

8. Rotate the disk to the closed position. Install the center key (key 27). Center the disk and center key along the shaft direction. Apply Loctite to the bolts and torque them to the amount in table 2.

9. If the seal ring and retainer need to be installed, complete the assembly instructions in the procedure for Replacing the Seal Ring.

Mounting the Actuator

8. Remove the disk gasket, disk keys, disk and thrust washer from the valve body.

Perform this procedure whenever the actuator is removed or disconnected from the valve. Actuator travel that is too short will increase shutoff leakage; too much travel will cause the disk to be driven into the seal ring.

9. The drive bearing (key 30) and shaft seal bearing (key 62) may have been on the shaft when it was removed. If they did not come out, you will need to drive them out.

Refer to the actuator instruction manual for actuator travel adjustment instructions.

10. If the follower bearing (key 30) requires replacement and cannot be removed by hand, knock or pry the bearing out. You may want to remove the follower flange assembly to get at the follower bearing.

2. Insert the valve shaft into the actuator.

Assembly 1. Lubricate the inner and outer diameter of the valve bearings (key 30). Place the valve/shaft bearing seals (key 62) into the valve bearings using a pre-formed flare tool. Insert the bearings into the valve.

2. Lubricate the shaft (key 16) and install it through the drive bearing and into the valve body cavity.

1. Move the disk to the closed position.

3. Attach the actuator to the valve.

After the actuator has been mounted, loosen the center key fasteners and apply torque to the shaft to allow final floating of the seal ring. With the valve in the closed position, tighten the center key fasteners to the specified torques. Then cycle the valve 3 times.

Changing Actuator Mounting Position

4. If necessary, install the disk keys (key 73A) by sliding the shaft back and forth until it fits.

Refer to figure X of this manual and the actuator instruction manual when changing mounting styles or positions. Right-hand mounting places the actuator on the right side of the valve as viewed from the upstream side of the valve; left-hand mounting places the actuator on the left side of the valve.

5. Rotate the shaft and disk so that the disk gasket groove is in place to prevent damage to the seat.

Complete the Mounting the Actuator procedure whenever the actuator is removed.

6. Install the shaft retainer (key 26). Lubricate the thrust washer (key 69) and follower flange pocket and shaft. Install the follower flange and gasket, torquing the follower flange cap screws to the torque specified in table 2.

Parts Ordering

3. Install the disk (see figure 2). Take note of the the center key position in relation to the seat alignment hole. Then, slide the shaft into the follower bearing.

7. Lubricate and install the packing box bushing. Then install the packing rings, packing studs (leave the marking visible), packing gland, packing gland retainer, packing flange, and packing nuts. The packing nuts should only be tightened to a snug fit.

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A model code and date of manufacture are assigned to each valve and stamped on the nameplate. For valve/actuator combinations assembled at the factory, the valve serial number is stamped on the nameplate attached to the actuator. Always refer to the valve nameplate information when corresponding with your Fisher Controls sales office or sales representative.

When ordering replacement parts from Orbit, specify the part name and desired material.

Design A61D TriAx

E0285 / IL

Figure 2. Design A61D TriAx Assembly

Parts Reference Key 10 15 16 18 20 21 22 24 25 26 27 30 34

Description Valve Body Disk Shaft Seat Packing Gland Packing Gland Retainer Packing Box Bushing Follower/Bottom Flange Packing Flange Shaft Retainer Center Key Bearing Seal Ring Locator

Key 35 36 60 61 62 63 69 70 71A 71B 72 73A 73C 74

Description Seal Ring Seal Ring Retainer Seal Ring Gasket Follower Flange Gasket Bearing/ Shaft Seal Packing Ring Thrust Washer Packing Stud Actuator Mounting Cap Screw Follower Flange Hex Bolt Packing Hex Nut Disk Square Key Disk Socket Head Cap Screw Dowel Pin

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Design A61D TriAx

Fisher and Fisher-Rosemount are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc.TriAx is a mark owned by Orbit Valve Company. All other marks are the property of their respective owners.

EFisher Controls International, Inc. 2000; All Rights Reserved

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 128461 8 Printed in U.S.A.