Fisher NotchFlo DST CL300 User manual

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FisherrNotchFlo™ DST Control Valve
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Specifications 3...............................
Installation 4...................................
Maintenance 5.................................
Packing Maintenance 7.........................
Adding Packing Rings 9.....................
Replacing Packing 9........................
Trim Removal 12..............................
Valve Plug Maintenance 12......................
Lapping Seats 13..............................
Trim Replacement 14..........................
Parts Ordering 15...............................
Parts Kits 16...................................
Parts List 16...................................
Figure 1. Fisher NotchFlo DST Control Valve
W9050
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher NotchFlo DST control
valve. Refer to separate manuals for instructions covering the actuator, positioner, and accessories.
Do not install, operate, or maintain NotchFlo DST valves 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 Process Management sales office before
proceeding.
Description
The NotchFlo DST globe (figure 1) and angle valves have metal seats, cage guiding, quick change trim, and
push‐down‐to‐close valve plug action. All available valve sizes and pressure ratings use balanced valve plugs with the
exception of CL900 and CL1500 (NPS 1 and 1‐1/2 valves) which use an unbalanced valve plug. To provide a seal
between the cage and a balanced valve plug, the balanced valve plugs use a pressure‐assisted spring‐loaded seal ring.
A properly sized NotchFlo DST valve with 3‐, 4‐, or 6‐stage dirty service anti‐cavitation trim (figure 2) offers excellent
control of high pressure drop liquids with entrained solids, while avoiding the damaging effects of cavitation and
erosive solids.
Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011

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NotchFlo DST Valve
March 2011
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Table 1. Specifications
Available Valves
CL600 3‐Stage: Level C only
CL900 and CL1500 vNPS 4, 4‐Stage: Levels A, B, and
C(1)
CL1500 wNPS 6, 4‐Stage: Level C only
CL2500 6‐Stage: Level C only
End Connection Styles and Ratings(2)
Flanged: Consistent with CL600, 900, 1500, and 2500
per ASME B16.34
Socket Welding: Consistent with CL600, 900, and
1500 per ASME B16.34
Buttwelding: Consistent with CL600, 900, 1500, and
2500 per ASME B16.34
Also see table 2
Shutoff Classification
Class V: [5x1012m3/sec/bar/mm of port diameter
(0.0005 mL/min/psid/in) of water at service pressure
drop] per ANSI/FCI 70‐2 and IEC 60534‐4
Flow Characteristic
Linear
Flow Direction
Flow up
Approximate Weights
See table 2
1. Levels A, B, and C provide for varied pressure drops and capacity.
2. The pressure/temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.
Figure 2. Fisher NotchFlo DST Trim
W8538-1
NotchFlo DST control valves utilize a high resistance, multi‐stage, axial flow path (or passage) where fluid flow is
parallel to the axis of the plug and cage.
Pressure reduction occurs throughout the length of the plug; thus individual stages aren't exposed to the full pressure
differential. Therefore, trim life is enhanced.
NotchFlo DST trim utilizes a series of notched flow restrictions and expansions to control the pressure drop of the
fluid. The amount of pressure drop per stage is controlled to prevent cavitation problems and minimize erosion issues.
Flow passage configuration provided by the multi‐stage plug and cage design make the NotchFlo DST valves
well‐suited for applications involving fluids with entrained particles. This is a potentially serious problem for other
anti‐cavitation valve designs which are subject to clogged flow passages.
Design of the trim allows for high rangeability.

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NotchFlo DST Valve
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Specifications
Specifications for NotchFlo DST valves are shown in table 1.
Table 2. Approximate Weights (Valve and Bonnet Assemblies)
VALVE DESIGN VALVE SIZE,
NPS
PRESSURE
RATING
KILOGRAMS POUNDS
Flanged
Socket Weld(1),
Butt Weld,
Screwed(2)
Flanged
Socket Weld(1),
Butt Weld,
Screwed(2)
3-Stage Globe Valves
1
CL600
20 15 45 35
2 40 30 90 70
3 70 50 155 110
4 120 80 265 175
6 275 230 610 510
8 510 445 1130 980
4-Stage Globe Valves
2
CL900 and
CL1500
95 85 210 185
3 185 140 405 310
4 340 280 750 620
3-Stage Angle Valves
1
CL600
20 ---44 ---
2 42 ---93 ---
3 86 ---190 ---
4 140 ---315 ---
6 300 ---660 ---
8 605 ---1340 ---
4-Stage Angle Valves
1
CL900 and
CL1500
50 40 110 90
1-1/2 55 45 120 95
2 95 95 210 210
3 185 ---405 ---
4 285 ---625 ---
6 560 ---1230 ---
81260 ---2770 ---
4-Stage Cast Angle Valves
1
CL900 and
CL1500
40 32 88 71
1-1/2 43 35 95 77
2 75 57 165 126
3 148 118 326 260
4 243 200 536 441
6 523 443 1153 977
81062 920 2342 2029
6-Stage Angle Valves
1
CL2500
64 67 140 148
2 180 170 405 375
3 500 473 1110 1043
4 465 433 1025 955
61060 1030 2330 2271
1. SWE available on NPS 1, 1-1/2, and 2 only.
2. Screwed end available on NPS 1 and 2 CL600 only.

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NotchFlo DST Valve
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Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Personal injury or property damage caused by sudden release of pressure may result if the valve assembly is installed where
service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To avoid such injury or
damage, provide a relief valve for over‐pressure protection as required by government or accepted industry codes and good
engineering practices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
WARNING
Some bonnet flanges have a tapped hole that was used to handle the bonnet during manufacture. Since this tapped hole
was not designed or intended to support the weight of the valve/bonnet assembly, do not use this tapped hole to lift the
valve assembly or personal injury may result from the assembly falling.
CAUTION
When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Since some body/trim material combinations are limited in their pressure
drop and temperature ranges, do not apply any other conditions to the valve without first checking with your Emerson
Process Management sales office.
1. Before installing the valve, inspect it to ensure that the valve body cavity is free of foreign material.
2. Clean out all pipelines to remove scale, welding slag, and other foreign materials before installing the valve.
3. Flow through the valve must be in the direction indicated by the flow arrow, which is cast on or attached to the
valve body.
4. Use accepted piping practices when installing the valve in the pipeline. For flanged valve bodies, use a suitable
gasket between the body and pipeline flanges.
5. Install a three‐valve bypass around the valve if continuous operation is required during maintenance.
6. If the actuator and valve body are shipped separately, refer to the actuator mounting procedure in the appropriate
actuator instruction manual.

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7. If the valve body was shipped without packing installed in the packing box, install the packing before putting the
valve body into service. Refer to instructions given in the Packing Maintenance procedure.
WARNING
Personal injury could result from packing leakage. Valve packing was tightened prior to shipment; however, the packing
might require some readjustment to meet specific service conditions. Check with your process or safety engineer for any
additional measures that must be taken to protect against process media.
Maintenance
Refer to figure 7 through 12.
Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing maintenance
and trim maintenance. All maintenance operations may be performed with the valve in the line.
WARNING
Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting
disassembly:
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 to avoid personal
injury.
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 actuator spring precompression.
D Use lock‐out procedures to be sure that 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 under pressure 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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NotchFlo DST Valve
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Figure 3. PTFE V‐Ring Packing Arrangements for Plain and Extension Bonnets
UPPER WIPER
(KEY 27)
PACKING
FOLLOWER (KEY 28)
PACKING BOX
RING (KEY 26)
FOR 316 SST
METAL PACKING BOX PARTS
SINGLE ARRANGEMENTS
12A7837‐A
B1429‐5
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
SPACER (KEY 24)
UPPER WIPER
(KEY 27)
PACKING
FOLLOWER
(KEY 28)
PACKING BOX
RING (KEY 26)
FEMALE
ADAPTOR
FEMALE
ADAPTOR
MALE
ADAPTOR
PACKING
RING
MALE
ADAPTOR
PACKING RING
WASHER
(KEY 25)
SPRING
(KEY 24)
LOWER
WIPER
LOWER
WIPER
1
1
1
1
1
1
1
1
NOTE:
MALE ADAPTOR, PACKING RING, FEMALE ADAPTOR,
AND LOWER WIPER ARE PART OF PACKING SET (KEY 22).
2 REQ'D FOR DOUBLE ARRANGEMENTS, EXCEPT LOWER WIPER.
1
Figure 4. Detail of Graphite Ribbon/Filament Packing
for Plain and Extension Bonnets PACKING
FOLLOWER
(KEY 28)
LANTERN
RING (KEY 24)
PACKING BOX
RING (KEY 26)
1
12.7 mm
(1/2 INCH)
STEM
SINGLE ARRANGEMENTS
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS;
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
1
GRAPHITE
RIBBON
PACKING RING
(KEY 23)
GRAPHITE
FILAMENT
PACKING RING
(KEY 23)
1
19.1 & 25.4 mm
(3/4 & 1 INCH)
STEM
13A9775‐B 13A9776‐B
Figure 5. Detail of Graphite ULF Packing for Plain
Bonnets
SINGLE ARRANGEMENTS
39B9286‐A
Table 3. CL600 Recommended Torque for Packing Flange Nuts (non live‐loaded)
VALVE STEM DIAMETER PRESSURE
RATING
GRAPHITE TYPE PACKING PTFE TYPE PACKING
Minimum Torque Maximum Torque Minimum Torque Maximum Torque
mm Inches NSm LbfSin NSm LbfSin NSm LbfSin NSm LbfSin
12.7 1/2 CL600 9 81 14 122 4 39 7 58
19.1 3/4 CL600 21 182 31 274 10 87 15 131
25.4 1 CL600 35 310 53 466 17 149 25 223

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NotchFlo DST Valve
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Table 4. CL900, 1500, and 2500 Recommended Torque for Packing Flange Nuts (non live‐loaded)
VALVE STEM
DIAMETER PRESSURE RATING
TORQUE
NSm lbfSft
mm Inches Min Max Min Max
12.7 1/2 CL900 12 18 9 13
CL1500 15 22 11 16
19.1 3/4 CL900 27 41 20 30
CL1500 34 50 25 37
25.4 1
CL900 42 62 31 46
CL1500 52 77 38 57
CL2500 61 91 45 67
31.8 1‐1/4 CL1500 68 102 50 75
CAUTION
The NotchFlo DST valve uses spiral‐wound gaskets which are crushed to provide their seal. A spiral‐wound gasket should
never be reused. Whenever a gasket seal is disturbed by removing or shifting gasketed parts, a new gasket must be
installed upon reassembly. This is necessary to ensure a good gasket seal, since the used gasket will not seal properly.
The spiral‐wound gaskets are of special design. Failure to use genuine Fisher replacement parts may result in valve damage
and/or failure.
Packing Maintenance
Key numbers refer to figure 3 for PTFE V‐ring packing and to figure 4 and 5 for graphite ribbon/filament and graphite
ULF packing, unless otherwise indicated.
WARNING
To avoid personal injury or equipment damage resulting from packing leakage, inspect the valve plug stem and packing box
wall for nicks or scratches while performing the following procedures.
Use care to avoid damaging these surfaces.
For spring‐loaded single PTFE V‐ring packing, the spring (key 24) maintains a sealing force on the packing. If leakage is
noted around the packing follower (key 28), check to be sure the shoulder on the packing follower is touching the
bonnet. If the shoulder is not touching the bonnet, tighten the packing flange nuts (key 21, figure 7 through 12) until
the shoulder is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing Packing
procedure.
Table 5. Torque for Body‐to‐Bonnet Bolting Using Anti‐Seize Lubricant for CL600 Fisher NotchFlo DST Valves
VALVE
RATING VALVE SIZE, NPS
BOLT TORQUES(1, 4)
SA193‐B7, SA193‐B8M Class 2(3) SA193‐B8M Class 1(2)
NSm LbfSft NSm LbfSft
CL600
1 122 90 61 45
2 91 67 43 32
3 163 120 84 62
4 258 190 149 110
6 740 550 ‐ ‐ ‐ ‐ ‐ ‐
8 550 405 ‐ ‐ ‐ ‐ ‐ ‐
1. Determined from laboratory tests.
2. SA193‐B8M annealed.
3. SA193‐B8M strain hardened.
4. For other materials, contact your Emerson Process Management sales office for torques.

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NotchFlo DST Valve
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Table 6. Torque for Body‐to‐Bonnet Bolting Using Anti‐Seize Lubricant for CL900 and CL1500, Fisher NotchFlo DST
Valves
VALVE
RATING
VALVE SIZE,
NPS
BOLT TORQUES(1)
SA193‐B7, SA193‐B8M Class 2(3) SA193‐B8M Class 1(2)
NSm LbfSft NSm LbfSft
CL900 & 1500
1 or 1‐1/2 258 190 149 110
2 373 275 237 175
3 712 525 509 375
4 942 695 705 520
6 2800 2070 ‐ ‐ ‐ ‐ ‐ ‐
8 2800 2070 ‐ ‐ ‐ ‐ ‐ ‐
1. Determined from laboratory tests.
2. SA193‐B8M annealed.
3. SA193‐B8M strain hardened.
Table 7. Torque for Body‐to‐Bonnet Bolting Using Anti‐Seize Lubricant for CL2500 Fisher NotchFlo DST Valves
VALVE RATING VALVE SIZE BOLT TORQUES(1)
SA193‐B7, SA193‐B8M Class 2(2)
NPS NSm lbfSft
CL2500
1 390 290
2 740 550
3 2240 1650
4 2800 2070
6 2800 2070
1. Determined from laboratory tests.
2. SA193‐B8M strain hardened.
Table 8. Valve Stem Connection Torque and Hole Size for Pin
VALVE STEM DIAMETER TORQUE, MINIMUM TO MAXIMUM HOLE SIZE
mm Inches NSm LbfSft mm Inch
12.7
19.1
25.4
31.8
1/2
3/4
1
1‐1/4
81‐115
237‐339
420‐481
827‐908
60‐85
175‐250
310‐355
610‐670
3.20 ‐ 3.25
4.80 ‐ 4.88
6.38 ‐ 6.45
6.38 ‐ 6.45
0.126 ‐ 0.128
0.189 ‐ 0.192
0.251 ‐ 0.254
0.251 ‐ 0.254
If there is undesirable packing leakage with other than spring‐loaded PTFE V‐ring packing, first try to limit the leakage
and establish a stem seal by tightening the packing flange nuts (key 21, figure 7 through 12) to at least the minimum
recommended torque in table 3 or 4. However, do not exceed the maximum recommended torque in table 3 or 4. or
excessive friction may result. If leakage continues, replace the packing by following the numbered steps presented in
the Replacing Packing procedure.
If the packing is relatively new and tight on the valve plug stem, and if tightening the packing flange nuts does not
stop the leakage, it is possible that the stem is worn or nicked so that a seal cannot be made. The surface finish of a
new stem is critical for making a good packing seal. If the leakage comes from the outside diameter of the packing, it
is possible that the leakage is caused by nicks or scratches around the packing box wall. While replacing the packing
according to the Replacing Packing procedure, inspect the valve plug stem and packing box wall for nicks or scratches.

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Adding Packing Rings
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
To avoid personal injury or equipment damage resulting from packing leakage, inspect the valve plug stem and packing box
wall for nicks or scratches while performing the following procedures.
Use care to avoid damaging these surfaces.
Key numbers referred to in this procedure are shown in figures 7 through 12, unless otherwise indicated.
When using packing with a lantern ring (key 24) it may be possible to add packing rings above the lantern ring as a
temporary measure without removing the actuator from the valve body.
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 packing flange nuts (key 21) and lift the packing flange, upper wiper, and packing follower (keys 19,
27, and 28) away from the valve body.
3. It may be possible to dig out the old packing rings on top of the lantern ring, but use care to avoid scratching the
valve plug stem or packing box wall. Clean all metal parts to remove particles that would prevent the packing from
sealing.
4. Remove the stem connector and slip the packing rings over the end of the valve plug stem.
5. Reassemble the packing follower, upper wiper, packing flange, and packing flange nuts (keys 28, 27, 19, and 21).
6. Reconnect the body‐actuator stem connection according to the appropriate actuator instruction manual.
7. Tighten the packing flange nuts only far enough to stop leakage under operating conditions. Check for leakage
around the packing follower when the valve is being put into service. Retighten the packing flange nuts as required
(see table 3 or 4).
Replacing Packing
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
To avoid personal injury or equipment damage resulting from packing leakage, inspect the valve plug stem and packing box
wall for nicks or scratches while performing the following procedures.
Use care to avoid damaging these surfaces.
Key numbers referred to in this procedure are shown in figures 7 through 12, 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 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 cap screws in the stem connector, and separate the two halves of the stem connector. Then exhaust all
actuator pressure, if any was applied, and disconnect the actuator supply and any leakoff piping.

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3. Remove either the yoke locknut (key 32) or the hex nuts (key 30), and remove the actuator from the bonnet (key
18).
4. Loosen the packing flange nuts (key 21) so that the packing (keys 22, 23, 209, or 210, figures 3, 4, or 5) is not tight
on the valve plug stem (key 6). Remove any travel indicator disk and stem locknuts from the valve plug stem
threads.
CAUTION
When lifting the bonnet (key 18), be sure that the valve plug and stem assembly (keys 5 and 6) remains on the seat ring
(key 4). This avoids damage to the seating surfaces as a result of the assembly dropping from the bonnet after being lifted
part way out. The parts are also easier to handle separately.
Use care to avoid damaging gasket sealing surfaces.
WARNING
To avoid personal injury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by
following the instructions in the next step. Do not remove a stuck bonnet by pulling on it with equipment that can stretch
or store energy in any other manner. The sudden release of stored energy can cause uncontrolled movement of the bonnet.
If the cage sticks to the bonnet, proceed carefully with bonnet removal and support the cage so that it will not fall
unexpectedly from the bonnet.
Note
The following step also provides additional assurance that the valve body fluid pressure has been relieved.
5. Hex nuts (key 14) attach the bonnet to the valve body. Loosen these nuts approximately 3 mm (1/8 inch). Then
loosen the body‐to‐bonnet gasketed joint by either rocking the bonnet or prying between the bonnet and valve
body. Work the prying tool around the bonnet until the bonnet loosens. If no fluid leaks from the joint, proceed to
the next step. If fluid leaks from the joint, the process pressure was not relieved from the valve as noted in the
Warning at the beginning of the Maintenance section in this manual.
6. Unscrew the hex nuts (key 14) and carefully lift the bonnet off the valve stem. If the valve plug and stem assembly
starts to lift with the bonnet, use a brass or lead hammer on the end of the stem and tap it back down. Set the
bonnet on a cardboard or wooden surface to prevent damage to the bonnet gasket surface.
7. Remove the valve plug (key 5), bonnet gasket (key 11), cage (key 2), cage gaskets (if applicable) (key 65), seat ring
(key 4), and the seat ring gasket(s) (key 12).
CAUTION
Inspect the seat ring, cage, bonnet, and body gasket surfaces. These surfaces must be in good condition, with all foreign
material removed. Small burrs less than approximately 0.076 mm (0.003 inch) in height (the thickness of a human hair) can
be ignored. Scratches or burrs that run across the serrations are not permitted under any conditions, since they will
prevent the gaskets from sealing properly.
8. Clean all gasket surfaces with a good wire brush. Clean in the same direction as the surface serrations, not across
them.

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9. Cover the opening in the valve body to protect the gasket surface and to prevent foreign material from getting into
the valve body cavity.
10. Remove the packing flange nuts (key 21), packing flange (key 19), upper wiper (key 27), and packing follower (key
28). Carefully push out all the remaining packing parts from the valve side of the bonnet using a rounded rod or
other tool that will not scratch the packing box wall.
11. Clean the packing box and the following metal packing parts: packing follower, packing box ring (key 26), spring
or lantern ring (key 24), and, for single arrangements of PTFE V‐ring packing only, special washer (key 25).
12. Inspect the valve stem threads for any sharp edges that might cut the packing. A whetstone or emery cloth may
be used to smooth the threads if necessary.
13. Remove the protective covering from the valve body cavity, and install the seat ring and cage using new seat ring
gasket(s) (key 12), bonnet gasket (key 11), and cage gaskets (if applicable) (key 65). Install the plug, then slide the
bonnet over the stem and onto the studs (key 13).
Figure 6. Installing Graphite Ribbon/Filament Packing Rings One at a Time
VALVE STEM
PACKING
FOLLOWER
BONNET
TOP OF PACKING
RING EVEN WITH
BOTTOM OF
ENTRANCE
CHAMFER
INSTALLING
SECOND PACKING RING
A2207‐2
INSTALLING
FIRST PACKING RING
Note
The prelubricated hex nuts (key 14) referred to in step 14 can be identified by a black film coating on the nut threads.
The proper bolting procedures in step 14 include‐‐but are not limited to‐‐ensuring that the bonnet stud threads are clean, and that
the hex nuts are evenly tightened to the specified torque values.
CAUTION
Failure to comply with good bonnet‐to‐body bolting practices and the torque values shown in tables 5, 6, and 7 may result
in damage to the valve. Cheater bars or slug wrenches should not be used for this procedure.
Hot torquing is not recommended on CL900, CL1500, and CL2500 valves. When operating temperature has been reached,
perform this torquing procedure once again on CL600 valves.
14. Lubricate the stud threads and the faces of the hex nuts (key 14) with anti‐seize lubricant (not necessary if new
factory prelubricated hex nuts are used). Install the hex nuts and tighten them finger‐tight. Stroke the valve several
times to center the trim. Torque the nuts in a crisscross pattern to no more than 1/4 of the nominal torque value
specified in tables 5, 6, and 7.

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When all nuts are tightened to that torque value, increase the torque by 1/4 of the specified nominal torque and
repeat the crisscross pattern. Repeat this procedure until all nuts are tightened to the specified nominal value. Apply
the final torque value again and, if any nut still turns, tighten every nut again.
Note
When installing packing rings, prevent entrapping air between the rings. Add the rings one at a time without forcing them below
the chamfer of the packing box entrance chamber. As each successive ring is added, the stack should not be pushed down more
than the thickness of the added ring (figure 6).
15. Install new packing and the metal packing box parts according to the appropriate arrangement in figures 3, 4, or
5. If desired, packing parts may be pre‐lubricated with a silicon base grease for easier installation. Slip a
smooth‐edged pipe over the valve stem, and gently tap each soft packing part into the packing box, being sure that
air is not trapped between adjacent soft parts.
16. Slide the packing follower, wiper, and packing flange into position. Lubricate the packing flange studs (key 20) and
the faces of the packing flange nuts (key 21). Install the packing flange nuts.
For the spring‐loaded PTFE V‐ring packing shown in figure 3, tighten the packing flange nuts until the shoulder on the
packing follower (key 28) contacts the bonnet.
For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 3 or 4.
Then, loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in table 3 or
4.
For other packing types, tighten the packing flange nuts alternately in small equal increments until one of the nuts
reaches the minimum recommended torque shown in table 3 or 4. Then, tighten the remaining flange nuts until the
packing flange is level and at a 90‐degree angle to the valve stem.
17. Mount the actuator on the valve body assembly, and reconnect the actuator and valve plug stems according to
the procedures in the appropriate actuator instruction manual.
Trim Removal
Key numbers referenced in this procedure are shown in figures 7 through 12, except where indicated.
1. Remove the actuator and bonnet by following steps 1 through 6 of the replacing packing procedure. Observe all
warnings and cautions in that procedure.
2. Lift the valve stem and attached valve plug out of the valve body. If the valve plug is to be reused, tape or otherwise
protect the valve plug stem and the valve plug seating surface to prevent scratches.
3. Lift out the cage (key 2), the bonnet gasket (key 11), and (if applicable) the cage gaskets (key 65).
4. Remove the seat ring (key 4) and the seat ring gasket(s) (key 12).
5. Inspect the parts for wear or damage and replace if needed.
6. Refer to the Valve Plug Maintenance procedure or to the Lapping Seats procedure.
Valve Plug Maintenance
Key numbers used in this procedure are shown in figures 7 through 12, except where indicated.
1. With the valve plug (key 5) removed according to the trim removal procedure, proceed as appropriate:
For the NPS 1 and 1‐1/2 CL900 or 1500 NotchFlo DST valves, proceed to step 2.

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For all other NotchFlo DST valves, work the retaining ring (key 10) off the valve plug with a screwdriver. Carefully slide
the backup ring, seal ring, and anti‐extrusion rings (keys 9, 8, and 63) off the valve plug.
2. To replace the valve plug stem (key 6), drive out the pin (key 7), and unscrew the stem from the valve plug.
CAUTION
Never reuse an old stem with a new valve plug. Using an old stem with a new plug requires drilling a new pin hole in the
stem. This weakens the stem and may cause the stem to fail in service. If a new valve plug is required, always order a valve
plug, stem, and pin as an assembly. Specify the correct part number of each of the three parts, but state that the parts are
being ordered as an assembly.
A used valve plug may be reused with a new stem.
3. Thread the new stem into the valve plug and tighten it to the appropriate torque value given in table 8. Using the
valve plug pin hole as a guide, drill the pin hole through the stem. Refer to table 8 for drill sizes.
4. Drive in the pin to lock the assembly.
5. If it is necessary to lap the seating surfaces, complete the lapping seats procedure before installing the seal ring.
The Trim Replacement procedure provides seal ring installation instructions and valve reassembly instructions.
Lapping Seats
Key numbers referenced in this procedure are shown in figures 7 through 12, except where indicated.
With metal‐seat constructions, lapping seating surfaces of the valve plug and seat ring (keys 5 and 4) can improve
shutoff. (Deep nicks should be machined out rather than ground out.) Use a good quality lapping compound of a
mixture of 280 to 600‐grit. Apply the compound to the bottom of the valve plug.
Note
NotchFlo DST valves use spiral‐wound gaskets. These gaskets provide their seal by being crushed and therefore should never be
reused. This includes reusing a gasket after the lapping procedure has been performed.
An “old” gasket can be used to lap the seat, however the gasket must be replaced with a new gasket.
To preserve the effects of lapping, do not change either the position of the seat ring in the valve body cavity or the position of the
cage on the seat ring after lapping the seating surfaces. When the parts are removed for cleaning and replacement of the “old”
gaskets, return them to the original positions.
Use the following procedure to lap the seating surfaces.
1. Install the following parts according to the instructions presented in the trim replacement procedure: “old” seat
ring gasket(s) (key 12), seat ring (key 4), cage (key 2), “old” bonnet gasket(key 11), and (if applicable) the “old”
cage gaskets (key 65).
2. Proceed as appropriate:
For a NotchFlo DST balanced valve, install the valve plug and stem assembly (keys 5 and 6)‐‐without seal ring
(key 8)‐‐into the cage.
For a NotchFlo DST unbalanced valve, install the valve plug and stem assembly (keys 5 and 6) into the cage.
3. Install the bonnet (key 18) over the valve stem, and secure the bonnet with four of the hex nuts (key 14).

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
14
4. Attach a handle, such as a piece of strap iron secured by stem locknuts, to the valve stem. Rotate the handle
alternately in each direction to lap the seats.
5. After lapping, disassemble as necessary (you may mark the position of the seat ring and cage with a soft tip
marker). Clean the seating surfaces, replace the gaskets, reassemble (taking care to return the seat ring and cage to
their original positions), and test for shutoff. Repeat the lapping procedure if necessary.
Trim Replacement
WARNING
Observe the warning at the start of the Maintenance section.
After all trim maintenance has been completed, reassemble the valve body by following the numbered steps below.
Be certain that all gasketed surfaces have been well cleaned. Key numbers referenced in this procedure are shown in
figures 7 through 12, except where indicated.
CAUTION
Inspect the seat ring, cage, bonnet, and body gasket surfaces. These surfaces must be in good condition, with all foreign
material removed. Small burrs less than approximately 0.076 mm (0.003 inches) in height (the thickness of a human hair)
can be ignored. Scratches or burrs that run across the serrations are not permitted under any conditions, since they will
prevent the gaskets from sealing properly.
1. Install the seat ring gasket (key 12) into the valve body. Install the seat ring (key 4).
2. For CL600, CL900, and CL1500 vNPS 4 valves, install the second seat ring gasket (key 12) onto the seat ring.
For CL1500 wNPS 6 and CL2500 valves, install the first cage gasket (key 65) onto the seat ring.
3. Install the cage.
4. For a NotchFlo DST balanced valve, install the anti‐extrusion rings (key 63) onto the valve plug (key 5). Install the
seal ring (key 8) onto the valve plug (key 5). Install the ring with the open side facing the valve plug stem end of the
valve plug for flow‐up applications (view A of figures 7 through 12). Slide the backup ring (key 9) onto the valve
plug. Secure with the retaining ring (key 10).
5. Install the valve plug into the cage.
6. Install the bonnet gasket (key 11). For CL1500 wNPS 6 and CL2500 valves, install the second cage gasket (key 65)
onto the cage.
7. Install the bonnet over the valve stem and onto the valve body.
Note
The prelubricated hex nuts (key 14) referred to in step 8 can be identified by a black film coating on the nut threads.
The proper bolting procedures in step 8 include‐‐but are not limited to‐‐ensuring that the bonnet stud threads are clean, and that
the hex nuts are evenly tightened to the specified torque values.

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
15
Table 9. Actuator Groups by Type Number
Group 1
71 & 90 mm (2‐13/16 and 3‐9/16 Inch) Yoke Boss
Group 100
127 mm (5‐Inch) Yoke Boss
585C
657 & 667
1008
585C
657
Group 101
127 mm (5‐Inch) Yoke Boss
667
CAUTION
Failure to comply with good bonnet‐to‐body bolting practices and the torque values shown in tables 5, 6, and 7 may result
in damage to the valve. Cheater bars or slug wrenches should not be used for this procedure.
Hot torquing is not recommended on CL900, CL1500, and CL2500 valves. When operating temperature has been reached,
perform this torquing procedure once again on CL600 valves.
8. Lubricate the stud threads and the faces of the hex nuts (key 14) with anti‐seize lubricant (not necessary if new
factory prelubricated hex nuts are used). Install the hex nuts, but do not tighten them. Torque the nuts in a
crisscross pattern to no more than 1/4 of the nominal torque value specified in table 5, 6, or 7. When all nuts are
tightened to that torque value, increase the torque by 1/4 of the specified nominal torque and repeat the crisscross
pattern. Repeat this procedure until all nuts are tightened to the specified nominal value. Apply the final torque
value again and, if any nut still turns, tighten every nut again.
9. Install new packing and packing box parts per steps 15 and 16 of the Replacing Packing procedure. Be certain to
observe the note given prior to step 15 of that procedure.
10. Mount the actuator by following the procedures in the actuator instruction manual. Check for packing leakage as
the valve is being put into service. Retorque the packing flange nuts as required. See tables 3 and 4.
Parts Ordering
Each valve body‐bonnet assembly is assigned a serial number which can be found on the valve. This same number also
appears on the actuator nameplate when the valve is shipped from the factory as part of a control valve assembly.
Refer to the serial number when contacting your Emerson Process Management sales office for technical assistance.
When ordering replacement parts, reference the valve serial number to obtain the correct eleven‐character part
number for each part; the following Parts Kit and Parts List is for information only.
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not,
under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or
maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and
end user.

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
16
Parts Kits
Packing Kits (non live‐loaded)
Stem Diameter, mm (Inches)
Yoke Boss Diameter, mm (Inches)
12.7 (1/2)
71 (2‐13/16)
19.1 (3/4)
90 (3‐9/16)
25.4 (1)
127 (5)
31.8 (1‐1/4)
127 (5)
Single PTFE (Contains keys 22, 24, 25, 26, 27) RPACKX00022 RPACKX00032 ‐ ‐ ‐ ‐ ‐ ‐
Single Graphite Ribbon/Filament (Contains keys 23, 23, 24, 26) RPACKX00112 RPACKX00122 ‐ ‐ ‐ ‐ ‐ ‐
Graphite ULF (Contains keys 207, 208, 209, 210, 214) RPACKX00602 RPACKX00612 RPACKX00622 RPACKX00632
Parts List
Numerous available combinations of valve parts make selection of some parts difficult; when ordering valve parts for
which a part number is not listed, provide the valve serial number with the order, permitting proper selection of
replacement parts to be made at the factory.
Note
For part numbers not shown, contact your Emerson Process
Management sales office.
Key Description Part Number
1 Valve Body ‐‐‐
If you need a valve body as a replacement
part, order by valve size, serial number,
and desired material.
2* Cage
4* Seat Ring
5* Valve Plug
6* Valve Stem
7* Pin
8* Seal Ring
9* Back Up Ring
10* Retaining Ring
11* Bonnet Gasket
12* Seat Ring Gasket
13 Stud, Cont Thd
14 Hex Nut
15 Anti‐Seize Lubricant
Key Description Part Number
16 Nameplate (not shown)
17 Wire (not shown)
18 Bonnet‐‐‐
If you need a bonnet as a replacement
part, order by valve size and stem
diameter, serial number, and desired
material.
19 Packing Flange
20 Stud Bolt
21 Hex Nut
22* Packing Set
23* Packing Ring
24 Spring or Lantern Ring
25 Washer, Special
26* Packing Box Ring
27* Upper Wiper
28 Follower
29 Stud Bolt
30 Hex Nut
32 Yoke Locknut
38 Drive Screw
41 Flow Arrow
63* Anti‐Extrusion Ring
65* Cage Gasket
CL1500, NPS 6, qty 1
CL1500, NPS 8 and CL2500, qty 2
66* Carbon Steel Washer
*Recommended spare parts

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
17
Figure 7. Fisher NotchFlo DST CL600 Balanced Globe Valve Assembly (NPS 1 through 8)
GE14589
jAPPLY LUB
5-INCH
YOKE BOSS
VIEW A
FLOW
A

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
18
Figure 8. Fisher NotchFlo DST CL900 and 1500 Balanced Globe Valve Assembly (NPS 2 through 4)
GE14166‐A
jAPPLY LUB
5-INCH
YOKE BOSS
VIEW A
FLOW
FLOW UP
A

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
19
Figure 9. Fisher NotchFlo DST CL900 and 1500 Unbalanced Angle Valve Assembly (NPS 1 to 1‐1/2)
GE14052‐A
jAPPLY LUB
NOTE: NotchFlo FORGED BLOCK ANGLE
VALVE BODIES UTILIZE DRILLED AND
TAPPED LINE FLANGE BOLTING
CONNECTIONS.
FLOW UP
FLOW

Instruction Manual
D103211X012
NotchFlo DST Valve
March 2011
20
Figure 10. Fisher NotchFlo DST CL900 and 1500 Balanced Angle Valve Assembly (NPS 2 through 4)
and CL600 Balanced Angle Valve Assembly (NPS 1 through 8)
GE14174‐A
jAPPLY LUB
NOTE: NotchFlo FORGED BLOCK ANGLE VALVE BODIES UTILIZE
DRILLED AND TAPPED LINE FLANGE BOLTING CONNECTIONS.
CL1500 NPS 4, 4-STAGE
NotchFlo DST SHOWN
FLOW
FLOW UP
VIEW A
5 INCH YOKE BOSS
A