Fisher Control-Disk User manual

www.Fisher.com
Fisher™Control‐Disk™Rotary Valve
Contents
Introduction 1...................................
Scope of Manual 1.............................
Description 1................................
Educational Services 2...........................
Specifications 2..............................
Installation 4....................................
Maintenance 7..................................
Packing Maintenance 8........................
Replacing the Seal Ring Assembly 12.............
Replacing the Disk, Shafts, or Bearings 12.........
Actuator Mounting 18.........................
Parts Ordering 18
................................
Parts Kits 20...................................
Parts List 21...................................
Figure 1. Fisher Control‐Disk Valve with 2052
Actuator and DVC6200 Digital Valve Controller
W9418-2 LUGGED STYLE
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher Control‐Disk valve,
DN50 through DN300 or NPS 2 through NPS 12 (figure 1). Refer to separate instruction manuals for information
covering the power on‐off actuator and accessories.
Do not install, operate, or maintain a Control-Disk valve without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson sales office or Local Business Partner before
proceeding.
Description
The Control‐Disk rotary valve offers excellent throttling performance. An equal percentage flow characteristic provides
an improved throttling range comparable to that of a segmented ball valve. This improved capability allows you to
control closer to the target set point, regardless of process disturbances, which results in a reduction in process
variability.
Retainer clips provide for versatility to mount and align the same wafer style valve body in different piping
configurations (ASME and EN ratings). The valve body is compatible with PN 10 through PN 40, CL150, and CL300
ratings. Face‐to‐face dimensions meet EN 558, API 609, and MSS‐SP68 standards.
The Control‐Disk rotary valve features an eccentrically‐mounted disk with either soft or metal seal, providing capability
for enhanced shutoff. The interchangeable sealing technology allows for the same valve body to accept both soft and
metal seals.
Instruction Manual
D103298X012
Control-Disk Valve
June 2017

Instruction Manual
D103298X012
Control-Disk Valve
June 2017
2
Educational Services
For information on available courses for Fisher Control-Disk valves, as well as a variety of other products, contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [email protected]
emerson.com/fishervalvetraining
Table 1. Fisher Control‐Disk Valve Specifications
Specifications EN ASME
Valve Body Size DN 50, 80, 100, 150, 200, 250, and 300 NPS 2, 3, 4, 6, 8, 10, and 12
Pressure Rating PN 10 to 40 per EN 12516‐1 CL150 and 300 per ASME B16.34 (CL600 for NPS 2)
Valve Body Materials
EN 1.0619 steel WCC steel
EN 1.4409 stainless steel CF3M (316L) stainless steel
CW2M(1) CW2M(1)
M35‐2(4) M35‐2
Disk Materials
PTFE or RPTFE
Seal(3)
EN 1.4409 stainless steel CF3M stainless steel
CW2M CW2M
M35‐2 M35‐2
Metal or
UHMWPE(2) Seal Chrome‐plated EN 1.4409 Stainless Steel Chrome‐plated CF3M Stainless Steel
End Connections Mates with raised‐face flanges
per EN 1092‐1
Mates with raised‐face flanges
per ASME B16.5
Valve Body Style Wafer (limited sizes) and lugged with tapped or through holes
Face‐to‐Face Dimensions Meets MSS SP68, API 609, and EN 558 standards
Shutoff PTFE, RPTFE, or UHMWPE seal ring ‐ Class VI per ANSI/FCI 70‐2 and IEC 60534‐4
S31600 (316 SST) seal ring -Class IV per ANSI/FCI 70-2 and IEC 60534-4
Flow Direction Standard (forward flow) is with the seal retainer facing upstream; reverse flow is permissible within specified
pressure drop limitations for soft seal only. Metal seal is unidirectional.
Flow Characteristic Equal percentage
Disk Rotation Counterclockwise to open (when viewed from actuator side of valve body) through 90 degrees of disk rotation
1. This material is not listed in EN 12516-1 or ASME B16.34. See table 4 for pressure/temperature ratings.
2. UHMWPE stands for ultra high molecular weight polyethylene.
3. RPTFE is a reinforced PTFE seal.
4. This material is not listed in EN 12516-1. See table 4 for pressure/temperature ratings.
Table 2. Valve Size, Shaft Diameter, and Approximate Weight
VALVE SIZE PRESSURE RATING SHAFT DIAMETER APPROXIMATE WEIGHT
Wafer‐Style Lugged
DN NPS EN ASME mm Inches kg Pounds kg Pounds
50 2 PN10‐40 CL150/300/600 12.7 1/2 4.7 10 6.7 15
80 3 PN10‐40 CL150/300 15.9 5/8 - - - - - - 11.2 25
100 4 PN10‐40 CL150/300 19.1 3/4 - - - - - - 17.6 39
150 6 PN10‐40 CL150/300 25.4 1 15.7 35 26.5 58
200 8 PN10‐16 CL150 31.8 1‐1/4 - - - - - - 40.9 90
PN25‐40 CL300 31.8 1‐1/4 34.6 76 46.7 103
250 10 PN10‐16 CL150 31.8 1‐1/4 - - - - - - 50.7 112
PN25‐40 CL300 31.8 1‐1/4 52 115 79.4 175
300 12 PN10‐16 CL150 38.1 1‐1/2 - - - - - - 98.6 217
PN25‐40 CL300 38.1 1‐1/2 - - - - - - 104.9 231

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Control-Disk Valve
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Table 3. Material Temperature Capabilities
MATERIAL TEMPERATURE LIMITS(1)
EN Materials
Valve Body Shaft Bearing Lining and Jacket Seal Packing _C_F
1.0619 Steel S17400 or
S20910
PEEK / PTFE PTFE or RPTFE PTFE or Graphite –10 to 232 14 to 450
UHMWPE PTFE or Graphite –10 to 93 14 to 200
Metal PTFE or Graphite –10 to 232 14 to 450
R30006 (Alloy 6) or S31600 Nitride Metal Graphite –10 to 400 14 to 752
1.4409
Stainless
Steel
S20910 PEEK / PTFE PTFE or RPTFE PTFE or Graphite –10 to 232 14 to 450
UHMWPE PTFE or Graphite –10 to 93 14 to 200
Metal PTFE or Graphite –10 to 232 14 to 450
R30006 (Alloy 6) or S31600 Nitride Metal Graphite –10 to 500(2) 14 to 932(2)
CW2M N10276 PEEK / PTFE PTFE or RPTFE PTFE –10 to 232 14 to 450
M35‐2 N05500 PEEK / PTFE PTFE or RPTFE PTFE –10 to 232 14 to 450
ASME Materials
Valve Body Shaft Bearing Lining and Jacket Seal Packing _C_F
WCC steel S17400 or
S20910
PEEK / PTFE PTFE or RPTFE PTFE or Graphite –29 to 232 -20 to 450
UHMWPE PTFE or Graphite –18 to 93 0 to 200
Metal PTFE or Graphite –29 to 232 -20 to 450
R30006 (Alloy 6) or S31600 Nitride Metal Graphite –29 to 427 -20 to 800
CF3M
Stainless
Steel
S20910 PEEK / PTFE PTFE or RPTFE PTFE or Graphite –46 to 232 –50 to 450
UHMWPE PTFE or Graphite –18 to 93 0 to 200
Metal PTFE or Graphite –46 to 232 –50 to 450
R30006 (Alloy 6) or S31600 Nitride Metal Graphite –46 to 454(2) –50 to 850(2)
CW2M N10276 PEEK / PTFE PTFE or RPTFE PTFE –46 to 232 –50 to 450
M35‐2 N05500 PEEK / PTFE PTFE or RPTFE PTFE –46 to 232 –50 to 450
1. Minimum allowable temperature for PN series flanges is -10_C (14_F). See requirements of EN 13445‐2 Annex B for applications below -10_C (14_F) with PN series flanges.
2. For applications exceeding 427_C (800_F), consult your Emerson sales office or Local Business Partner for appropriate high temperature disk edge coating selection.
Table 4. Maximum Allowable Inlet Pressure for CW2M and M35‐2 Valves
TEMPERATURE CW2M(1) M35‐2(3)
150(2) 300(2) PN 10(2) PN 16(2) PN 25(2) PN 40(2) PN 10(2) PN 16(2) PN 25(2) PN 40(2)
_C Bar Bar
–46 to 38
50
100
150
200
232
20.0
19.5
17.7
15.8
13.8
12.7
51.7
51.7
51.5
50.3
48.3
47.0
10.0
9.9
9.4
9.4
9.1
9.1
16.0
15.9
15.1
15.1
14.6
14.6
25.0
24.8
23.6
23.6
22.9
22.9
40.0
39.6
37.8
37.8
36.6
36.6
9.3
9.3
9.3
9.3
9.0
9.0
15.2
15.2
15.1
14.8
14.5
14.5
23.8
23.8
23.7
23.4
22.5
22.4
37.9
37.9
37.8
37.2
36.3
36.2
_F Psig Psig
–50 to 100
200
300
400
450
290
260
230
200
185
750
750
730
700
680
145
144
137
133
133
232
230
219
212
212
362
359
342
331
331
580
575
548
530
530
135
135
135
130
130
220
220
215
210
210
345
345
340
325
325
550
540
525
525
525
1. This material is not listed in EN 12516‐1 or ASME B16.34. Also see the Installation section.
2. The designations PN or 150 and 300 are used only to indicate relative pressure‐retaining capabilities and are not EN or ASME pressure‐temperature rating class designations.
3. This material is not listed in EN 12516-1. Also see the Installation section.

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Installation
Key numbers in this procedure are shown in figure 10 unless otherwise indicated.
WARNING
Always wear protective gloves, clothing and eyewear when performing any installation operations to avoid personal
injury.
To avoid personal injury or property damage resulting from the bursting of pressure retaining parts, be certain the service
conditions do not exceed either the valve body rating or the flange joint rating, or other limits given in table 1 or on the
nameplate. Use pressure‐relieving or pressure‐limiting devices to prevent the service conditions from exceeding these
limits.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section on page 7
in this manual.
CAUTION
The valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions specified in the customer's order. Because some valve 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 Emerson sales office or Local Business Partner.
The maximum allowable inlet pressures for steel and stainless steel valve bodies are consistent with the
pressure‐temperature ratings shown in table 1, except where further limited by the trim and packing material
temperature capabilities given in table 3. Valves are also available in CW2M and M35‐2 valve body materials. The
CW2M valve body material is not listed in EN 12516-1 or in ASME B16.34. The M35-2 valve body material is listed in
ASME B16.34, but is not listed in EN 12516-1. Valve bodies constructed of these materials mate with EN and ASME
flanges, but must not be installed in systems requiring conformance to EN or ASME standards if not included in EN or
ASME pressure/temperature ratings. Maximum allowable inlet pressures for Control‐Disk valve bodies made of CW2M
or M35‐2 construction materials are shown in table 4.
1. Install a three‐valve bypass around the control valve assembly if continuous operation is necessary during
inspection and maintenance of the valve.
2. Inspect the valve body to be certain it is free of foreign material.
3. The valve is normally shipped as part of a control valve assembly, with an actuator mounted on the valve body.
If the valve body and actuator have been purchased separately or if the actuator has been removed for maintenance,
mount the actuator, and adjust actuator travel before inserting the valve body into the line. This is necessary due to
the measurements that must be made during the actuator adjustment process. Refer to the Actuator Mounting
section on page 18 of this manual and to the separate actuator instruction manual for mounting and adjusting
instructions before proceeding.
4. Inspect adjacent pipelines to be certain they are free of any foreign material, such as pipe scale or welding slag, that
could damage the valve body seating surfaces.
CAUTION
Damage to the disk (key 3) will occur if any pipe flanges or piping connected to the valve body interfere with the disk
rotation path. However, the disk can be rotated without interference when the valve body is installed between adjacent
pipe flanges or piping that has an inside diameter equal to or greater than either schedule 80 pipe or compatible EN pipe

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sizes. If piping with a smaller inner diameter than specified above is connected to the valve, measure carefully to be certain
the disk rotates without interference before putting the valve into operation.
5. Flow is in the standard direction when the seal retainer (key 2) is facing upstream. Standard flow direction is also
indicated by the flow direction arrow cast into the valve body. Flow in the reverse direction is permissible within
allowable pressure drop limits for the soft seal. The metal seal is forward flow only.
CAUTION
Control‐Disk valve disk rotation is counterclockwise to open (when viewed from the actuator side of the valve body, see
figure 7) through 90 degrees of disk rotation. Rotating the disk (key 3) past either the open or closed position could
damage the seal and disk sealing surfaces and could cause the disk to jam in the seal retainer.
6. With the disk in the closed position, install line flange gaskets, and insert the valve between the pipeline flanges.
Use either flat sheet gaskets or spiral‐wound gaskets with compression‐controlling centering rings. Spiral‐wound
gaskets without compression‐controlling centering rings are not recommended for this purpose.
7. Depending on valve size and pressure rating, the wafer style valve is centered in the pipeline using either retainer
clips or the flange bolt holes. (For valves that have four flange bolt holes in the valve body (key 1), each hole
engages one corresponding line flange stud.) Insert the valve between the flanges and use either the retainer clips
or install two or more line flange studs into the line flanges to help hold the valve in position while centering the
valve. Carefully center the valve on the flanges to ensure disk clearance.
D Select and install two pipeline gaskets.
Note
Lubricate line flange studs before inserting them into flanges. If necessary, provide additional support for the control valve
assembly because of its combined weight.
WARNING
For lugged valve bodies with threaded line bolt holes, personal injury and property damage could result from sudden
release of process pressure if line bolts are not properly installed. To ensure proper line bolt thread engagement, line studs
must be centered in the threaded section of the valve body so that each stud has equal thread engagement in the body. See
figure 2.
8. After centering the valve body, first lubricate and then install the remaining line flange bolting to secure the valve in
the pipeline. Tighten the nuts to the line flange studs in a crisscross pattern to ensure proper alignment of valve,
gaskets, and flanges.
WARNING
A Control‐Disk valve body is not necessarily grounded when installed in a pipeline. If the valve is used in a flammable or
hazardous atmosphere or for oxygen service, an explosion could result due to a discharge of static electricity from the valve
components. To avoid personal injury or property damage, always make sure the valve body is grounded to the pipeline
before putting the control valve assembly into operation in a flammable or hazardous atmosphere.

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Control-Disk Valve
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Table 5. Stud Bolt Data
VALVE SIZE WAFER STYLE AND LUGGED STYLE WITH THROUGH DRILLED HOLES
PN 10 PN 16 PN 25 PN 40
DN
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
A
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
A
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
A
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
A
Dimen‐
sion,
mm
50 4 M16X2 125 4 M16X2 125 4 M16X2 130 4 M16X2 130
80 8 M16X2 140 8 M16X2 140 8 M16X2 150 8 M16X2 150
100 8 M16X2 150 8 M16X2 150 8 M20X2.5 160 8 M20X2.5 160
150 8 M20X2.5 160 8 M20X2.5 160 8 M24X3 180 8 M24X3 170
200 8 M20X2.5 170 12 M20X2.5 170 12 M24X3 190 12 M27X3 210
250 12 M20X2.5 180 12 M24X3 190 12 M27X3 210 12 M30X3.5 230
300 12 M20X2.5 190 12 M24X3 200 16 M27X3 230 16 M30X3.5 250
VALVE SIZE LUGGED STYLE (THREADED HOLES)
PN 10 PN 16 PN 25 PN 40
DN
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
B
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
B
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
B
Dimen‐
sion,
mm
No. of
Stud
Bolts
Size Dia
&
Thread,
mm
B
Dimen‐
sion,
mm
50 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
80 16 M16X2 85 16 M16X2 85 16 M16X2 90 16 M16X2 90
100 16 M16X2 90 16 M16X2 90 16 M20X2.5 100 16 M20X2.5 100
150 16 M20X2.5 110 16 M20X2.5 110 - - - - - - - - - - - - - - - - - -
200 16 M20X2.5 110 24 M20X2.5 110 24 M24X3 120 - - - - - - - - -
250 24 M20X2.5 120 24 M24X3 120 24 M27X3 130 - - - - - - - - -
300 24 M20X2.5 120 24 M24X3 130 24 M27X3 140 24 M30X3.5 150
VALVE SIZE
WAFER STYLE AND LUGGED STYLE WITH THROUGH DRILLED
HOLES LUGGED STYLE (THREADED HOLES)
CL150 CL300 CL150 CL300
NPS
No. of
Stud
Bolts
Size Dia
&
Thread,
Inch
A
Dimen‐
sion,
Inch
No. of
Stud
Bolts
Size Dia
&
Thread,
Inch
A
Dimen‐
sion,
Inch
No. of
Stud
Bolts
Size Dia
&
Thread,
Inch
B
Dimen‐
sion,
Inch
No. of
Stud
Bolts
Size Dia
&
Thread,
Inch
B
Dimen‐
sion,
Inch
2 4 5/8‐11 5 8 5/8‐11 5.25 - - - - - - - - - - - - - - - - - -
3 4 5/8‐11 5.75 8 3/4‐10 6.5 8 5/8‐11 4.00 16 3/4‐10 4.25
4 8 5/8‐11 6 8 3/4‐10 7 16 5/8‐11 4.00 16 3/4‐10 4.50
6 8 3/4‐10 6.5 12 3/4‐10 7.5 16 3/4‐10 4.25 24 3/4‐10 4.75
8 8 3/4‐10 7 12 7/8‐9 9 16 3/4‐10 4.50 24 7/8‐9 5.50
10 12 7/8‐9 8 16 1‐8 10 24 7/8‐9 5.00 32 1‐8 6.50
12 12 7/8‐9 8.5 16 1‐1/8‐8 11 24 7/8‐9 5.25 32 1‐1/8‐8 7.00
Figure 2. Stud Bolts for Installation (also see table 5)
WAFER‐STYLE VALVE BODY LUGGED STYLE VALVE BODY (THREADED HOLES)
A
CENTERLINE OF
THREADED SECTION
BB
A3887-1 A3886-1

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Note
Standard packings for the Control‐Disk valve are composed of all conductive packing rings (graphite ribbon packing) or partially
conductive packing rings (such as a carbon‐filled PTFE female adaptor with PTFE V‐ring packing) to electrically bond the shaft to
the valve body for hazardous area service. For oxygen service applications, provide alternate shaft‐to‐valve body bonding
according to the following step.
9. For oxygen service applications, attach the bonding strap assembly (key 131, figure 3) to the shaft with the clamp
(key 130, figure 3), and connect the other end of the bonding strap assembly to the valve body with the cap screw
(key 35). Secure each cap screw with a hex nut (key 36).
WARNING
Personal injury could result from packing leakage. Valve packing was tightened prior to shipment; however, the packing
might require some re-adjustment to meet specific service conditions.
Valves with ENVIRO‐SEALtpacking systems will not require this initial re‐adjustment. See ENVIRO‐SEAL Packing
System for Rotary Valves Instruction Manual (D101643X012) for packing instructions. If you wish to convert your
present packing arrangement to ENVIRO‐SEAL packing, refer to the retrofit kits listed in the parts kit sub‐section on
page 20 of this manual.
Maintenance
Valve body parts are subject to normal wear and must be inspected regularly and replaced as necessary. The frequency
of inspection and replacement depends upon the severity of service conditions. Instructions are given in this section
for: replacing trim components, changing disk rotation or valve action, and mounting and adjusting the actuator.
As used in these instructions, actuator refers to power actuators (such as pneumatic diaphragm, piston actuators, and
rack and pinion actuators).
WARNING
Avoid personal injury and property damage from sudden release of process pressure or bursting of parts. Before
performing any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when 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
on 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 spring precompression.
D Use lock‐out procedures to be sure the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out when removing the packing hardware or packing rings, or when loosening the
packing box pipe plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.

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Figure 3. Optional Shaft‐to‐Valve Body Bonding Strap Assembly
Packing Maintenance
Refer to figure 4 for available packing configurations. All maintenance operations in this section may be performed
with the valve in the line. Packing may be PTFE V‐ring or graphite.
An ENVIRO‐SEAL packing system is also available with the Control‐Disk valve. To install the ENVIRO‐SEAL packing
system in an existing valve, follow the instructions in the instruction manual included with the packing system
(D101643X012). To remove packing parts in a valve with the ENVIRO‐SEAL packing system, follow the procedures for
valves with the ENVIRO‐SEAL packing system in this section. Install the replacement packing following the instructions
in the packing system instruction manual (D101643X012).
Stopping Leakage
For valves with PTFE or graphite packing:
CAUTION
Tighten the packing flange only enough to prevent shaft leakage. Excessive tightening will only accelerate wear of the
packing and could produce higher torques on the valve.
Leakage around the packing followers can be stopped by tightening the packing flange nuts (key 28, figure 10).
If the packing is relatively new and tight on the shaft, and if tightening the packing flange nuts does not stop leakage,
the shaft may be worn or nicked so that a seal cannot be made. If the leakage comes from the outside diameter of the
packing, the leakage may be caused by nicks or scratches around the packing box wall. Inspect the shaft and packing
box wall for nicks and scratches when performing the packing replacement procedures.
For valves with the ENVIRO‐SEAL packing system:
Optimum performance of the ENVIRO‐SEAL packing system is obtained when the Belleville springs are tightened to
their “target load.” The target load is the point where the springs are compressed to 85% of their maximum deflection,
or nearly flat. Maximum deflection is when the springs are 100% compressed, or completely flat.

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Figure 4. Packing Arrangement Details
STANDARD PACKING
ENVIRO‐SEAL PACKING
SINGLE PTFE PACKING GRAPHITE PACKING
PTFE V‐RING GRAPHITE RIBBON
THESE TWO SURFACES SHOULD REMAIN PARALLEL AS YOU ALTERNATELY AND EVENLY TIGHTEN THE PACKING NUTS (KEY 28).
NOTES:
WITH CONDUCTIVE PACKING, THE FEMALE ADAPTOR IN PTFE V‐RING PACKING IS CARBON‐FILLED PTFE.
APPLY LUBRICANT.
1
2
3
GE39901‐A GE39986‐A
GE40113‐A GE40118‐A
Under normal conditions, the packing nuts should not require re‐tightening. However, when servicing, if the springs
do not remain at the target load of 85% compression, retighten the packing box nuts according to the following
procedure:
1. Tighten the packing flange nuts alternately and evenly, keeping the packing flange parallel with the valve flange
(see figure 4), until the Belleville springs are compressed 100% (or completely flat).
D For PTFE packing, loosen each packing flange nut one half turn (180_of rotation).
D For Graphite packing, loosen each packing flange nut one quarter turn (90_of rotation).
The target load of 85% compression has now been reached. If leakage continues, replace the packing components as
described in the following procedures.

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Replacing the Packing
To replace the packing, the actuator must be removed. Also, the valve should be removed from the pipeline to allow
proper readjustment of the disk position.
WARNING
The edges of a rotating disk have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disk edges when rotating the disk (key 3).
CAUTION
Damage to the disk (key 3) may occur if the disk is not closed when the valve is being removed from the pipeline. If
necessary, apply operating pressure to the actuator temporarily to retain the disk in the closed position while removing the
valve from the pipeline.
For valves with PTFE or graphite packing:
Key numbers in this procedure are shown in figure 10 unless otherwise indicated.
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 shutoff all pressure lines to the power
actuator, release all pressure from the actuator. Use lock‐out procedures to be sure the above measures stay in
effect while you work on the equipment.
CAUTION
When removing the actuator in the following step, use a wheel puller to separate the actuator parts from the valve shaft.
Do not drive the actuator parts off the valve shaft because this could damage valve trim components.
2. Remove the actuator per instructions in separate actuator instruction manuals, then remove the cap screws and
nuts (keys 35 and 36). Remove the clamp (key 130, figure 3) if the strap (key 131, figure 3) is used.
3. Remove the packing flange nuts and the packing flange (key 26) if used and pull out the packing follower (key 25).
4. Remove the anti‐blowout ring (key 40) from the drive shaft (key 10).
5. Remove the old packing rings (key 24) and, if used, the packing washers (key 31). Carefully avoid scratching the
shaft or packing box wall to avoid damage that could cause leakage around the shaft. Clean all accessible metal
parts and surfaces to remove particles that would prevent the packing from sealing.
WARNING
Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.