Baker Hughes Masoneilan 41005 Series User manual

Baker Hughes Data Classification : Public
Masoneilan™
41005 Series
Cage Guided Globe Valve
Instruction Manual (Rev. F)

2 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECT-SPECIFIC
REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER/OPERATOR’S NORMAL OPERATION AND
MAINTENANCE PROCEDURES. SINCE OPERATION AND MAINTENANCE PHILOSOPHIES VARY, BAKER
HUGHES COMPANY (AND ITS SUBSIDIARIES AND AFFILIATES) DOES NOT ATTEMPT TO DICTATE SPECIFIC
PROCEDURES, BUT TO PROVIDE BASIC LIMITATIONS AND REQUIREMENTS CREATED BY THE TYPE OF
EQUIPMENT PROVIDED.
THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL UNDERSTANDING OF THE
REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL AND ELECTRICAL EQUIPMENT IN POTENTIALLY
HAZARDOUS ENVIRONMENTS. THEREFORE, THESE INSTRUCTIONS SHOULD BE INTERPRETED AND
APPLIED IN CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS APPLICABLE AT THE SITE AND
THE PARTICULAR REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT NOR
TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION,
OPERATION OR MAINTENANCE. SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR
PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER/OPERATOR’S PURPOSES
THE MATTER SHOULD BE REFERRED TO BAKER HUGHES.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF BAKER HUGHES AND THE CUSTOMER/OPERATOR ARE
STRICTLY LIMITED TO THOSE EXPRESSLY PROVIDED IN THE CONTRACT RELATING TO THE SUPPLY OF THE
EQUIPMENT. NO ADDITIONAL REPRESENTATIONS OR WARRANTIES BY BAKER HUGHES REGARDING THE
EQUIPMENT OR ITS USE ARE GIVEN OR IMPLIED BY THE ISSUE OF THESE INSTRUCTIONS.
THESE INSTRUCTIONS ARE FURNISHED TO THE CUSTOMER/OPERATOR SOLELY TO ASSIST IN THE
INSTALLATION, TESTING, OPERATION, AND/OR MAINTENANCE OF THE EQUIPMENT DESCRIBED. THIS
DOCUMENT SHALL NOT BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN APPROVAL OF
BAKER HUGHES.

Masoneilan 41005 Series Globe Valves Instruction Manual | 3
© 2020 Baker Hughes Company. All rights reserved.
Contents
Safety Information ..........................................................................4
About this Manual ..........................................................................4
1. General .................................................................5
2. Numbering System .......................................................6
3. Installation ..............................................................7
3.1 Cleanness of Piping..................................................................7
3.2 Isolating By-Pass Valve ...............................................................7
3.3 Heat Insulation ......................................................................7
3.4 Hydraulic Test and Cleaning of Lines ....................................................7
3.5 Flow Direction ......................................................................7
4. Disassembly.............................................................8
4.1 Removal of Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Opening of the Pressurized Chamber ...................................................... 8
4.3 Disassembly of Valve Plug Stem ........................................................9
4.4 Disassembly of the Auxiliary Pilot Plug ...................................................9
4.5. Disassembly of 41705 HTS Plug .........................................................9
5. Maintenance – Repair ....................................................10
5.1 Packing Box .......................................................................10
5.2 Repair of Parts .....................................................................10
6. Valve Reassembly .......................................................12
6.1 Pinning the Valve Plug Stem ..........................................................12
6.2 Assembly of Ring or Spring-Energized Seal Ring..........................................13
6.3 41405 Valve Plug and Cage Assembly ............................................... 14
6.4 Assembly of the Parts Inside the Valve Body .............................................14
6.5 Assembly of Bonnet.................................................................14
6.6 Tightening of Body Stud Nuts .........................................................15
6.7 Assembly of Packing Box ............................................................15
Torque Requirements: Body / Bonnet Bolting [ft-lb] .......................................... 16-17
Torque Requirements: Body / Bonnet Bolting [m.daN]........................................ 18-19
7. Actuator ...............................................................20
7.1 Coupling of Actuator Type 88 No. 6 ....................................................20
7.2 Coupling of Actuator Type 87 No. 6 ....................................................20
7.3 Coupling of Actuator Type 7 No. 10, 16 and 23 ........................................ 20
7.4 Coupling of Actuator Type 88 No. 10, 16 and 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.5 Coupling of Air-to-Extend Actuator (Type 37) .......................................... 22
7.6 Coupling of Air-to-Retract Actuator (Type 38) .......................................... 22
7.7 Other Types of Pneumatic Actuators ....................................................22
Body Sub Assembly ........................................................25

4 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
Safety Information
Important - Please Read Before Installation
Masoneilan 41005 Series instructions contain DANGER,
WARNING, and CAUTION labels, where necessary, to
alert you to safety related or other important information.
Read the instructions carefully before installing and
maintaining your control valve. DANGER and WARNING
hazards are related to personal injury. CAUTION
hazards involve equipment or property damage.
Operation of damaged equipment can, under certain
operational conditions, result in degraded process system
performance that can lead to injury or death. Total
compliance with all DANGER, WARNING, and CAUTION
notices is required for safe operation.
CAUTION
CAUTION
WARNING
DANGER
This is the safety alert symbol. It alerts you to potential
personal injury hazards. Obey all safety messages that
follow this symbol to avoid possible injury or death.
CAUTION
CAUTION
WARNING
DANGER
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION
WARNING
DANGER
Indicates a potentially hazardous situation which, if not
avoided, could result in serious injury.
CAUTION
CAUTION
WARNING
DANGER
Indicates a potentially hazardous situation which, if not
avoided, could result in minor or moderate injury.
CAUTION
CAUTION
WARNING
DANGER
When used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, could
result in property damage.
Note: Indicates important facts and conditions.
About this Manual
• The information in this manual is subject to change
without prior notice.
• The information contained in this manual, in whole or
part, shall not be transcribed or copied without Baker
Hughes written permission.
• Please report any errors or questions about
the information in this manual to your local supplier.
• These instructions are written specifically for the 41005
Series control valves, and do not apply for other valves
outside of this product line.
Useful Life Period
The current estimated useful life period for the Masoneilan
41005 Series control valve is 25+ years. To maximize
the useful life of the product it is essential to conduct
annual inspections, routine maintenance and ensure
proper installation to avoid any unintended stresses on
the product. The specific operating conditions will also
impact the useful life of the product. Consult the factory
for guidance on specific applications if required prior to
installation.
Warranty
Items sold by Baker Hughes are warranted to be free
from defects in materials and workmanship for a period
of one year from the date of shipment provided said items
are used according to Baker Hughes recommended
usages. Baker Hughes reserves the right to discontinue
manufacture of any product or change product materials,
design or specifications without notice.
Note: Prior to installation:
• The valve must be installed, put into service and
maintained by qualified and competent professionals who
have undergone suitable training.
• Under certain operating conditions, the use of damaged
equipment could cause a degradation of the performance
of the system which may lead to personal injury or death.
• Changes to specifications, structure, and components
used may not lead to the revision of this manual unless
such changes affect the function and performance of the
product.
• All surrounding pipe lines must be thoroughly flushed to
ensure all entrained debris has been removed from the
system.

Masoneilan 41005 Series Globe Valves Instruction Manual | 5
© 2020 Baker Hughes Company. All rights reserved.
1. General
1.1 Scope
The following instructions are designed to guide the user
through the installation and maintenance of the 41005
Series valves for all sizes and all pressure classes.
1.2 Serial Plate
The serial plate is usually fixed to the side of the actuator
yoke. It indicates, amongst other things, the type of valve,
the pressure class, the material used for the pressurized
chamber and the air supply pressure of the actuator.
1.3 After Sales Service
Baker Hughes offers it clientele an After Sales Service
comprising highly qualified technicians, for the operation,
maintenance and repair of its equipment. To benefit from
this service, contact our local representative or the After
Sales Service whose email address is given at the end of
this document.
1.4 Spare Parts
When carrying out maintenance operations, only
manufacturer’s replacement parts must be used, obtained
through our local representatives or our Spare Parts
Service.
When ordering spare parts, the model and serial numbers
indicated on the manufacturer’s serial plate must be given.
The recommended spare parts are indicated in the parts
list included in this instruction manual on page 23.
1.5 Actuator and Other Accessories
The valve is equipped with an actuator; like all the other
valve accessories, actuators are the subject of special
instructions which provide information on the electric
and pneumatic connections. The instruction manuals to
be used for standard actuators are GEA31171 for types
37/38, GEA19530 for types 87/88.
Important
This document contains all the instructions required for the installation, operation and maintenance of the
equipment.
Regular maintenance, strict observance of these instructions and the use of manufacturer’s replacement parts will
guarantee optimum operation and reduce maintenance costs.

6 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
2. Numbering System
Note: This instruction manual describes all the standard options in the 41005 Series valve. To satisfy the particular conditions of your
application, Baker Hughes may have had to develop a special option which is the subject of an additional clause to this instruction manual.
In this case, the instructions given in the additional clause always take precedence over the general instructions.
2nd 3rd
0
4th
0
5th
5
6th
2nd
1
1st
4
1st
Actuator Type and
action on air failure
Multispring
87 Open
88 Close
Cylinder
51 Double Acting
52 Open
53 Close
Spring-Diaphragm
37 Air to Extend
38 Air to Retract
Body
Series
41 Cage
Guided,
Balanced
Globe
Seal
Type
0. Undefined
3. Pressure
Energized
PTFE Seal Ring
4. Auxiliary Shut-
off Plug (Pilot)
5. Metal Seat Ring
6. PTFE Seal Ring
7. High Temp.
Seal
9. Graphite Seal
Ring
Trim Type /
Characteristic
0. Undefined
1. Standard Cage/
Linear
2. Standard Cage/
Equal %
3. Lo-dB/Anti-
Cav Single
Stage;Linear/
Equal %
4. Lo-dB/Anti-Cav
Single Stage with
Diffuser/
Linear/Equal %
5. Lo-dB Multi-
Stage/Linear
6. VRT (stack)
Type S/Linear
7. VRT (partial
stack) Type S/
Modified
8. VRT (cage)
Type C/Linear
9. Anti-Cav Multi-
Stage/ Linear
A. High Capacity
Linear
B. High Capacity
Equal %
C. High Capacity
Lo-dB/Anti-Cav
Design
Series
5
Optional
Config.
A. Angle Body
EB. Extension
Bonnet
C. Cryogenic
Extension
Bonnet

Masoneilan 41005 Series Globe Valves Instruction Manual | 7
© 2020 Baker Hughes Company. All rights reserved.
3. Installation
3.1 Cleanness of Piping
Before installing the valve in the line, clean piping and
valve of all foreign material such as welding chips, scale,
oil, grease or dirt. Gasket surfaces must be thoroughly
cleaned to insure leak-free joints.
3.2 Isolating By-Pass Valve
To allow for in-line inspection, maintenance and
removal of the valve without service interruption,
provide a manually operated stop valve on each side
of the control valve and a manually operated throttling
valve in the by-pass line.
3.3 Heat Insulation
In case of heat insulated installation, do not insulate the
valve bonnet and take protection measures related to
personal safety.
3.4 Hydraulic Test and Cleaning of
Lines
During this operation, the control valve must not be used
as an isolating valve.
This means that the valve must always be opened before
carrying out pressure tests in the process line, cleaning of
pipes, etc., otherwise equipment damages or destroying of
seal rings could result.
3.5 Flow Direction
The valve must be installed so that the controlled
substance will flow through the valve in the direction
indicated by the flow arrow located on the body.

8 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
4. Disassembly
4.1 Removal of Actuator
(Figures 15 and 16)
Access to the internal components of the body should be
accomplished with the actuator removed. To carry out this
operation, follow the instructions below and refer
to the specific actuator instructions, reference GEA19530
for a type 87/88 actuator and GEA31171 for the type 37/38
actuator.
4.1.1 Disconnection of instruments
Disconnect all mechanical couplings between the
positioner and the other instruments on the one hand and
the valve stem/actuator stem coupling on the
other hand.
4.1.2 Plug stems screwed into the actuator stem
In the case of air-to-retract actuators, apply sufficient air
pressure on the diaphragm to retract the stem completely.
Loosen the counter-nut, unscrew the stem.
During this operation, make sure that the plug
does not turn when it is seated. If the plug travel
is very small and there is a large amount of plug
stem inside the actuator, it may be necessary to
remove the yoke nut and lift the actuator so that
the plug is not touching the seat.
4.1.3 Stems attached with a stem connector
In the case of air-to-retract actuators, apply sufficient air
pressure on the diaphragm to retract the stem completely.
Loosen the screws and remove the stem connector.
4.1.4 Removal of actuator
Disconnect all the ingoing and outgoing air and electrical
connections from the actuator. Loosen the yoke nut or
attachment screws and lift the actuator, making sure
that the concentricity and/or the thread of the bonnet is
not damaged.
4.2 Opening of the Pressurized
Chamber
(Figures 17, 18 and 19)
Prior to disassembly, vent the process pressure
and isolate the valve if necessary.
Note: The valve must always be reassembled with new
packing rings and gaskets; before disassembly, make
sure that the appropriate parts are available.
A. Remove the packing flange nuts (3) then remove
the packing flange (4) and the packing follower (23).
B. Check that the exposed part of the valve plug
stem (1) is clean enough for the bonnet (7) to be
removed easily.
C. Remove the body stud nuts (8).
D. By means of a pad eye secured instead of the
actuator, lift the bonnet (7) up and separate it from
the valve body (18). During this operation, the valve
plug stem (1) must be pushed downwards so that
the valve plug remains in the valve body (18).
E. Remove the spring washer (17) and the body
gasket (10).
F. In the case of type 41305, 41375, 41505, 41605 and
41905 valves, remove the valve plug stem (1) and
valve plug (15) assembly from the cage by pulling
the valve plug stem upward, then remove the cage
(16) and “stack” (37) assembly for 41375 type valve.
Because of the cage gasket (31), the cage
can sometimes be lifted along with the valve
plug. If this should happen, press down on
the cage so that it remains in the body. If the
cage is lifted along with the valve plug, it
could slip during handling and fall.
In the case of a 41905 series valve [equipped with a
graphite ring (45)], make sure that the ring is not
damaged during the operation.
G. In the case of a 41405 valve, remove the valve
plug and body cage assembly by pulling the valve
plug stem upward; in this case, the valve plug has
a shoulder which prevents the cage from falling.
Remove the valve plug from the cage by pulling on
the end of the valve plug stem.
H. Remove the seat ring (13) and the seat ring gasket
(14) from the valve body (18).
I. Remove the packing (6), the packing spacer (5) and
the guide bushing (22) from the bonnet (7).
Note: A packing spacer (5) is only mounted when the
bonnet has a side connection.

Masoneilan 41005 Series Globe Valves Instruction Manual | 9
© 2020 Baker Hughes Company. All rights reserved.
4.3 Disassembly of Valve Plug Stem
The valve plug stem is screwed and pinned into the valve
plug (15).
To dismount the stem, the valve plug must be held as
indicated below, taking care not to damage the guiding
surfaces; the plug stem pin (9) is then removed. By means
of flats or using a nut and counter-nut on the end of the
stem, unscrew the stem taking care not to apply a bending
moment which could deform it.
Figure 1
Cylindrical machining diameter of the jaw =
plug shank diameter: Dia. A
Soft metal
vise draw
Do not tight
on the plug
skirt
Tight only on
this no guiding
surface
Stop pin
integrated in
vise jaw and
inserted into a
plug hole
4.4 Disassembly of the Auxiliary Pilot
Plug
When the valve is of the 41405 type.
In the case of 50, 80 or 100 mm (2”, 3” or 4”) valves
(Figure 17).
Exert a sufficient force on the auxiliary pilot plug (20) to
compress the spring washers (12). The retaining ring (19)
can then be removed, releasing the auxiliary pilot plug and
spring washers.
In the case of 150 to 400 mm (6” to 16”) valves (Figure
17).
To carry out this operation safely, screws of the diameter
and length indicated in the table in Figure 2 must be used.
Thread the socket head cap screws through the holes
in the auxiliary pilot plug (20). Tighten until the retainer
ring (19) can be removed. Loosen the screws gradually.
Remove the auxiliary pilot plug and the spring (12).
Valve size Pilot Dismounting Screws Size
mm in. Qty. Length Dia.
mm in.
150 6 2 57 2.25 1/4” – 20 UNC 2A
200 8 2 70 2.75
3/8” – 16 UNC 2A
250 10 2 63.5 2.5
300 12 3 101.5 4
400 16 3 63.5 2.5
Figure 2
4.5. Disassembly of 41705 HTS Plug
This plug type can only be serviced in the field by factory
qualified Masoneilan valve maintenance technicians due
to critical features that cannot be easily addressed in the
field.
Note to factory qualified Masoneilan valve
technicians: See the latest revision of CES-189 for
instructions and maintenance values.
The metal piston rings (11) can be replaced in the field per
instructions for plug type 41505.

10 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
5. Maintenance – Repair
5.1 Packing Box
Tightness of the packing box is obtained by compression
of the packing (6). Compression must be achieved by
evenly tightening the packing flange nuts (3) on the
packing flange (4). Periodical retightening of the packing
flange nuts is required to maintain tightness.
Make sure that the packing is not over tightened as this
could prevent smooth operation of the valve. If a leak
persists after the packing has been compressed to a
maximum, the packing needs to be changed.
A packing spacer (5) is only mounted when the bonnet
has a side connection.
5.1.1 Carbon/PTFE and pure PTFE packing rings
Carbon/PTFE and pure PTFE packing rings are cut in
such a way that they can be replaced without having to
separate the valve plug stem from the actuator stem.
A. Unscrew and remove the packing flange nuts (3).
B. Lift the packing flange (4) and packing follower (23)
up along the valve stem.
C. By means of a puller, remove the packing (6) and
packing spacer (5), taking care not to damage the
sealing surface of the packing box lantern or the
valve plug stem.
D. Replace the packing rings, with the cut in each ring
placed about 120° from the next, pressing them
down one at a time and respecting the table below:
Carbon/PTFE and pure PTFE packing box
Number of rings
N.D. mm
(in.)
without side
connection
with side connection
on top of
packing
spacer
under
packing
spacer
50
(2”) 6 2 4
80 – 100
(3” – 4”) 8 3 5
150 to 600
(6” to 24”) 7 2 5
Figure 3
E. Put the follower (23) and the packing flange (4)
back on.
F. Screw and tighten the packing flange nuts (3)
without cramming the packing rings.
G. Put the valve back into service and check for
tightness. Tighten packing flange nuts (3) as
required.
5.1.2 Graphite packing ring
To carry out this operation, the valve plug stem must be
removed. See chapter on actuator disassembly.
A. Loosen and remove packing flange nuts (3).
B. Remove packing flange (4), and packing follower
(23) from the plug stem.
C. By means of a puller, remove packing rings (6),
insuring not to damage the sealing surface of
packing box or plug stem.
D. Replace new packing set (6); first one back-up ring
(Carbon/Graphite braided ring), then expanded
graphite rings (smooth rings), at last, one other
braided back-up ring; it is important to press the
rings down one at a time in the packing box.
Number of
packing set Number of rings
N.D. mm
(in.) Braided Graphite Braided
50 (2”) 1 4 1
80 – 100
(3” – 4”) 1 6 1
150 to 600
(6” to 24”) 1 5 1
Figure 4
E. Put the follower (23) and packing flange (4) back on.
F. Screw and moderately tighten the packing flange
nuts (3).
G. Reassemble the valve plug stem (see chapter on
actuator re-assembly).
H. Open and close the valve several times then tighten
the packing.
I. Put the valve back into service and check for
tightness. Tighten packing flange nuts (3) as
required.
5.2 Repair of Parts
Before re-assembly, the parts must be carefully
examined in order to eliminate any scratched, worn or
damaged parts.
5.2.1 Guiding surfaces
The guiding surfaces of the cage and valve plug, the
guide bushing, and the guiding surfaces of the plug stem
and auxiliary pilot plug must be checked in particular. If
there is only slight damage, a light abrasive can be used.
Otherwise the part must be replaced as soon as possible
(see paragraph “Spare parts”).

Masoneilan 41005 Series Globe Valves Instruction Manual | 11
© 2020 Baker Hughes Company. All rights reserved.
Cage
Pilot
Guiding
surface
Guiding
surface
Seating
surface
Figure 5
5.2.2 Seating surfaces
Valve Plug
Seat Ring
Plug seating
surface
Pilot seating
surface
(41405 only)
Guiding
surface
Guiding surface
Seating surface
Seating surface
Seat ring seating surface
31°30'
32°30' 62°30'
57°30'
29°30'
30°30'
Figure 6
Inspect all seating surfaces per Figure 6 which represents
all plug and seat types.
For type 41405 valves, if the surface of the auxiliary pilot
plug (20) is damaged, the auxiliary pilot plug must be
replaced (see paragraph “Spare parts”).
The seat ring (13), plug and auxiliary pilot plug (20)
seating surfaces must be completely free of dents,
wear and scratches.
If the auxiliary pilot plug seat in the valve plug (15) and/or
other valve plug or seat ring seating surfaces show signs
of slight deterioration, they can be touched up on a lathe.
For all valve types, when dressing up critical surfaces, no
more than 0.25 mm (0.010”) of metal must be removed
in the case of a 50, 80 or 100 mm (2”, 3” or 4”) valve and
no more than 0.4 mm (0.015”) in the case of a 150 to 400
mm (6” to 16”) valve. Make sure that the seating angle
indicated in Figure 6 is respected.
If a slight defect exists on any of the above seating
surfaces, lapping can be envisaged, in which case the
following must be respected:
• Spread a fine layer of high quality sealing compound
on the seating surface.
• Put the seat ring (13) in the body, noting the angle.
• In the case of 41305, 41505, 41605 and 41905 valves,
put the cage (16) on the seat ring.
• In case of 41375 valves, put the stack (48) on the seat
ring and the cage (16) on the stack.
• In the case of 41405 and 41705 valves, assemble the
valve plug, cage and stem (15)-(16)-(1).
• In case of 41305, 41505, 41605, 41375 and 41905,
assemble the valve plug (15) and stem (1).
• Assemble the bonnet (7) and its guide bushing (22).
• Place an appropriate tool on the valve plug stem (1) to
turn it.
• Lap by slightly rotating the valve plug or the auxiliary
pilot plug in alternative directions. After several
rotations, lift the valve plug, turn it 90°, and start again.
• Lapping can be repeated, but must be limited as much
as possible so that the seat remains sufficiently narrow
to guarantee tightness.
• Disassemble the parts, clean them and put them back,
respecting the initial angle.
5.2.3 Gasket seating surfaces
Gasket seating surface must be free of dents, scratches
and corrosion; otherwise, they will need to be repaired.
5.2.4 Seal rings and gaskets
Spiral-wound gaskets (10), (14) and (36) must always be
changed after disassembly. Seal rings (11A), (11C) or
(11E) can be reused if they are free of scratches, erosion
and corrosion.
5.2.5 Valve plug, valve plug stem
If the valve plug has to be changed, then the stem must
also be completely changed to guarantee correct pinning
of the assembly. If only the valve plug stem has to be
changed, then the valve plug can be reused.

12 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
6. Valve Reassembly
6.1 Pinning the Valve Plug Stem
The valve plug (15) and stem (1) assembly consists of a
stem threaded into the valve plug and pinned in place.
If the valve plug (15) [or the auxiliary pilot plug (20)
in the case of a 41405 valve] needs to be replaced,
it is recommended using a new stem. The hole of the
original pin in an old stem often prevents satisfactory
results being obtained and can seriously impair the
mechanical strength of the stem-valve assembly.
Assembly is carried out as follows:
6.1.1 Reference marking on the valve plug stem
Make a reference mark on the valve plug stem at a
distance “X” (Figures 7 and 8), equivalent to the stem
recess in the valve plug.
Note: For shouldered plug stems with two flats, the above
marking is unnecessary.
6.1.2 Tightening of the plug stem
To carry out this operation, the valve plug must be
prevented from moving by holding the plug shank with an
appropriate tool.
Screw two nuts on to the end of the new plug stem and
lock them together. Screw the valve plug stem solidly into
the plug, checking that the reference mark is level with the
end of the plug shank.
If the stem has flats, apply a torque “T” using a wrench of
dimension “E” (see Figure 7).
6.1.3 Drilling the pin hole (Figures 7 and 8)
Note: For this operation, it is recommended clamping
the valve plug-stem assembly by the plug shank to avoid
damaging the guiding surfaces; particular care must be
taken so that the pin hole goes through the valve plug
axis.
If the valve plug is new, drill a hole of diameter “C” at a
distance “D” from the end of the valve plug; choose the
diameter “C” from the table according to the type of pin
used (metric or English pin). If the hole is already drilled in
the valve plug, use the hole as a guide to drill through the
valve plug stem.
Valve
plug stem
diameter B
Diameter A
Metric pin,
diameter
C
Anglo-
Saxon
pin dia.
C
F D Distance
X E
Torque T
Non-
Shouldered
stem
Shouldered
stem
mm (in.) mm (in.) mm In. mm (in.) mm (in.) mm (in.) mm (in.) N.m (Ft.lbs) N.m (Ft.lbs)
12.7 (1/2) 20 (.79) 3.5 0.14 18 (.70) 18.5 (.73) 6 (.24) 17 (11/16) 50 (37) 60 (44)
15.87 (5/8) 25.5 (.98) 5.0 0.2 24 (.95) 28 (1.1) 8 (.30) 22 (7/8) 50 (37) 160 (118)
19.05 (3/4) 35 (1.38) 5.0 0.2 30 (1.2) 45 (1.77) 19 (.75) 27 (11/16) 160 (118) 160 (118)
25.4 (1.0) 44.5 (1.66) 8.0 5/16 40 (1.58) 47.5 (1.88) 25 (.98) 30 (11/4) 160 (118) 250 (184)
31.75 (1 1/4) 58 (2.28) 8.0 5/16 55 (2.20) 70 (2.76) 31.5 (1.24) 40 (1 5/8) - 800 (590)
38.1 (1 1/2) 70 (2.76) 10.0 - 65 (2.56) 90 (3.54) 33 (1.30) 50 (2) - 1 500 (1100)
Figure 7
Shouldered
stem
Shouldered stem
Two flats of wrench size “E”
Plug shank
Standard stem Dia. CStem pin
F
D
X
B
B
A
X
Standard
stem
Figure 8

Masoneilan 41005 Series Globe Valves Instruction Manual | 13
© 2020 Baker Hughes Company. All rights reserved.
6.1.4 Pinning
By means of a hammer, introduce the pin into the hole.
Complete the pinning operation, taking care to ensure that
the pin is recessed by the same amount at both sides.
Using a ball tooling and hammer, caulk the pin hole edge
of the plug.
Place the assembly in the soft jaw chuck of a lathe to
check alignment of the two parts; correct any alignment
defects.
6.2 Assembly of Ring or
Spring-Energized Seal Ring
6.2.1 41305 valve (Figures 9, 18 and 19)
These valves have a spring-energized seal rings
composed of a PTFE-based jacket maintained expanding
by a spring.
To insert the ring into the plug groove:
• Lubricate the entry chamber.
• Place the ring over the conical top of the plug so that
the lips of the ring face to the pressure (see Figure 9).
To the assembly direction of the radial ring (11F)
on the plug (see Figure 9). Flow Tends to Open:
the open side is in the top. Flow Tends to Close:
the open side is in the lower part.
• Slip to the ring into the groove (without spinning it) as
shown in Figure 9. This operation can be facilitated by
heating the ring. The temperature of the ring should not
exceed 150°C.
• Keep the ring retained until it returns to room
temperature and goes back in place within the groove.
Clamping with a collar (SERFLEX type) will help to
properly position the ring.
Pushing
Direction
FTO FTC
Pushing
Direction
Figure 9
6.2.2 41405 and 41505 and 41705 valves
(Figures 17 and 19)
These valves are equipped with metal rings; the inner ring
has a straight cut while the outer ring has a staggered cut.
To insert the rings into the cage groove, open the rings
slightly by hand and slide them, one after the other, along
the plug making sure that the parts are not damage.
Note: The cuts in the outer and inner rings are to be
placed at about 180° from each other.
6.2.3 41605 valve (Figure 19)
These valves are equipped with an inner elastomeric ring
and a PTFE gasket.
Insert the elastomeric ring (11D) in the groove.
Place the PTFE gasket (11C) at a temperature of 100°C
(boiling water) to 160°C for a few minutes to facilitate
insertion, then slide along the plug until it slips into the
groove.
For optimum insertion of the ring, a Serflex type ring
compressor can be used to compress the ring in the
groove for several minutes.
6.2.4 41905 valve (Figure 19)
These valves are equipped with rings; the inner metal ring
has a straight cut and the outer ring is made of graphite.
The new graphite seal ring (11A) is supplied in the form of
a closed ring in which a notch must be cut before being
inserted.
Graphite seal rings are fragile and the following
operations must be carried out very carefully.
Using a sharp blade, carry out two V notches on the two
opposite faces. Hold the ring on either side of the notch
between the thumb and index and bend until it breaks.
Using a very fine file, adjust each end of the ring so that
its external circumference corresponds to the internal
circumference of the inside diameter of the cage (16).
To adjust the length of the ring correctly, insert the new
graphite ring into the cage, with the ring against the
inner wall of the hole in the cage, allowing minimum play
between the two ends of the ring.
To insert the inner ring, then the graphite ring into the
cage groove, slightly open the rings by hand and slide
them one after the other along the plug, taking care not to
damage the parts.
Note: The cuts on each ring are to be placed at about
180° from each other.

14 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
6.2.5 41375 high temperature valve (232°C to
316°C) (Figure 19)
These valves are equipped with a seal ring composed of a
jacket and a metallic spring and two backup rings (11G).
Assemble the different parts as shown in Figure 19,
starting by the backup rings.
Put these parts as shown in Figure 19, the angle
of 90° of the backup ring in front of the extrusion
gap between cage and plug.
6.3 41405 Valve Plug and
Cage Assembly (Figure 17)
6.3.1 Assembly of valve plug and auxiliary pilot plug
Assemble, as appropriate, the flat spring or the coil
springs then the valve plug/plug stem assembly.
Using the same tools as those used for disassembly
(see chapter “Disassembly”), compress the springs so
that the retaining ring can be inserted in the groove of the
main plug.
6.3.2 Assembly of cage
Place the cage over the valve plug assembly via the top
of the plug stem. When doing so, take particular care to
position the ring correctly.
6.4 Assembly of the Parts Inside
the Valve Body (Figures 17, 18 and 19)
Proceed as follows:
• After checking that the surfaces are perfectly clean,
place the seat gasket (14) in the valve body, making
sure that it is centered as well as possible.
• Mount the seat ring or the diffuser seat (13).
• Mount:
– The cage (16) for 41305, 41605 and 41905 valves,
– The cage/plug/stem assembly for 41405 valves,
– The STACK assembly (making sure that the face
with the smallest number of holes is in contact
with the seat ring), and cage (16) for 41375
valves.
For the double-cage assembly, carry out the following
operations:
• Put the inner cage (16) upside down,
• Encase the outer cage (75) on the inner cage, maintain
them together with the two pins (76).
• In the case of valves other than 41405 valves, insert
the valve plug/stem/ring assembly into the cage taking
particular care as it goes past the ring or spring-
energized seal ring.
• In the case of valves with a N.D. less than 150 (6”),
place the body/cage gasket in the valve body, making
sure that it is centered as well as possible.
• For valve sizes 150 to 400 mm (6 to 16”), insert either
the cage gasket (24) or the flat spring washer (17).
• For valve sizes 450, 600 and 750 mm (18, 20 and 24”),
insert either the first cage gasket, the cage washer and
the second cage gasket or the flat spring depending
on the type of valve, then place the body gasket (10) in
the valve body making sure that it is centered as well
as possible.
To the direction of assembly of spring washer:
• ND 150 (6”) to 450 (18”) valves, the concave
face is upwards,
• ND 500 (20”), and 600 (24”), the concave face is
downwards and the tapped holes are visible.
6.5 Assembly of Bonnet
Check that the packing ring (6), the spacer (5) and the
guide bushing (22) have been removed from the bonnet.
Position the bonnet (7) above the valve, so that the
packing flange studs (2) are perpendicular to the flow
direction of the valve.
Lower the bonnet (7) onto the valve stem (1) and push it
down carefully until it goes into the valve body studs (21)
and takes up its correct position.
Grease the threads of the valve body studs (21) and the
bearing surfaces of the body stud nuts (8).
Screw on the body stud nuts by hand. Tighten the nuts
lightly and evenly so that the internal parts are held in
place. The face of the bonnet should be parallel to the
upper face of the body.
Slide the guide bushing (22) onto the valve plug stem and
let it drop to the bottom of the packing box housing.

Masoneilan 41005 Series Globe Valves Instruction Manual | 15
© 2020 Baker Hughes Company. All rights reserved.
6.6 Tightening of Body Stud Nuts
Alignment of internal parts
In order to achieve perfect alignment of the seat ring and
the valve plug, a force must be applied to the plug stem
during tightening of the bonnet which results in correct
relative positioning of the two parts.
The force can be applied with the pneumatic actuator
as follows:
Place the actuator on the valve bonnet (7) by means of the
yoke nut (33) or attachment screws and connect the valve
plug stem to the actuator stem. See chapter on actuators
for installation instructions.
During this operation, make sure that the plug
does not turn when it is seated. If the plug travel
is very small and there is a large amount of plug
stem inside the actuator, it may be necessary to
remove the yoke nut and lift the actuator so that
the plug is not touching the seat.
Align the internal parts as follows:
In the case of air-to-extend actuators, supply air to the
actuator at the maximum pressure indicated on the serial
plate and in the case of spring-to-extend actuators, do not
supply air to the actuator, so that the optimum positioning
of the valve plug and seat can be obtained.
Single bolting circle:
Evenly tighten the nuts (8) by applying the torque indicated
in table in Figure 10 and the tightening sequence in Figure
11.
Double bolting circle:
Beginning by the internal nuts, manually screw all the
bolts. Screw the internal nuts in order indicated by the
Figure 2 and screw them by successive, uniform and
progressive levels. During the tightening, make sure that
the bonnet face stays parallel at that of the body. When
the torque values given in the following table are reached,
the bonnet face must be in contact with that of the body.
Screw the external nuts in order indicated by the Figure 2
and screw them by successive, uniform and progressive
levels until the torque values given in the tables on pages
16 through 19.
6.7 Assembly of Packing Box
To assemble the packing box, proceed as indicated in the
“maintenance” chapter, paragraph 5.1.1 or 5.1.2.
Figure 11. Tightening sequence of nuts (8)

16 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
Body Bolts Torques in ft-lb
Nominal
sizes (in)
ASME
Classes Sizes (in) Quantity
- body/bonnet: all materials
- bolts materials :
A 193 Gr B7 / A194 Gr 2H,
EN 1.7225 / A194 Gr 2H,,
A 193 Gr B7M / A194 Gr 2HM,
A 320 Gr L7 / A194 Gr 7,
A 193 Gr B16 / A194 Gr 7 or
A 453 Gr 660 / A194 Gr 7
- body/bonnet material:
stainless steel
- bolts materials:
A 453 Gr 660 /
A 194 GR 8
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B8 class 2 /
A 194 GR 8
2
3 x 2
4 x 2
300 3/4-10UNC-2A 6103 162 162
600 3/4-10UNC-2A 6162 258 258
2
900 7/8-9UNC-2A 8155 243
1500 7/8-9UNC-2A 8221 354
2500 1-1/4-8-UN-2A 6406 649
3 x 2
4 x 2 900 - 1500 1-8UN-2A 8332 531
3
4 x 3
6 x 3
300 3/4-10UNC-2A 8133 214 214
600 3/4-10UNC-2A 8162 258 258
900 1-1/4-8-UN-2A 6561 900
1500 1-1/4-8-UN-2A 6811 1306
32500 1-1/2-8UN-2A 6774 1239
4
6 x 4
8 x 4
300 7/8-9UNC-2A 8170 273
600 7/8-9UNC-2A 8258 413
900 1-1/2- 8UN-2A 6885 1431
1500 1-1/2- 8UN-2A 61365 2205
42500 1-5/8-8UN-2A 8922 1497
6
8 x 6
10 x 6
300 1-8UN-2A 8325 516
600 1-8UN-2A 12 236 376
900 - 1500 1-3/4-8UN-2A 81365 2220
62500 1-7/8 -8UN-2A 81401 2279
8
10 x 8
12 x 8
300 1-1/4-8-UN-2A 8524 841
600 1-1/4-8-UN-2A 12 479 774
900 1-3/4-8UN-2A 81365 2220
1500 1-3/4-8UN-2A 81770 2877
82500 1-3/4-8UN-2A 12 1217 1992
10
300 1-1/2-8UN-2A 8848 1372
600 1-1/2-8UN-2A 12
900 1-3/4-8UN-2A 12 1365 2220
1500 1-3/4-8UN-2A 12 1623 2633
2500 2-8UN-2A 12 2065 3363
12
16 x 12
300 1-1/2-8UN-2A 8922 1490
600 1-1/2-8UN-2A 12 848 1372
900 1-1/2- 8UN-2A 16 922 1490
1500 1-3/4-8UN-2A 16 1623 2633
12 2500 1-7/8 -8UN-2A 20 1623 2641
14
300 1-1/2-8UN-2A 81564 1778
600 1-1/2-8UN-2A 12 1564 1778
900 2-8UN-2A 16 3275 3717
1500 2-1/2-8UN-2A 16 6609 7501
16
300 1-1/2-8UN-2A 12 848 1372
600 1-1/2-8UN-2A 16 922 1490
900 1-1/2- 8UN-2A 20 1106 1792
1500 1-3/4-8UN-2A 20 1918 3113
2500 2-8UN-2A 24 1955 3186
18
300 1-3/8-8UN-2A 16 679 1092
600 1-3/4-8UN-2A 16 1512 2456
900 2-1/4-8UN-2A 12 3356 5480
1500 2-1/2-8UN-2A 16 4794 7848
20
300 1-3/8-8UN-2A 24 738 1202
600 1-3/4-8UN-2A 24 1549 2515
900 1-7/8-8UN-2A 24 2950 4802
24
300 1-3/4-8UN-2A 20 1401 2279
600 1-3/4-8UN-2A 26 1770 2877
900 2-1/2-8UN-2A 20 5163 8453
Torque Requirements: Body / Bonnet Bolting [ft-lb]

Masoneilan 41005 Series Globe Valves Instruction Manual | 17
© 2020 Baker Hughes Company. All rights reserved.
Torque Requirements: Body / Bonnet Bolting [ft-lb]
410A5, 410B5, or 410C5 High Capacity Design
Body Bolts Torques in ft-lb
Nominal
sizes (in)
ASME
Classes Sizes (in) Quantity
- body/bonnet: all materials
- bolts materials:
A 193 Gr B7 / A194 Gr 2H,
EN 1.7225 / A194 Gr 2H,,
A 193 Gr B7M / A194 Gr 2HM,
A 320 Gr L7 / A194 Gr 7,
A 193 Gr B16 / A194 Gr 7 or
A 453 Gr 660 / A194 Gr 7
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B7 / A194 Gr 2H
A 453 Gr 660 / A 194
GR 8
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B8 class 2 /
A 194 GR 8
6150/300 1-8UN-2A 10 332 376
600 1-8UN-2A 12 317 354
8150/300 1-1/4-8-UN-2A 10 465 546
600 1-1/4-8-UN-2A 12 487 546
10 150/300 1-1/2- 8UN-2A 81254 1269
600 1-1/2-8UN-2A 10 1313 1342
12 150/300 1-3/4-8UN-2A 12 810 906
600 1-3/4-8UN-2A 12 1214 1360
16 150/300 1-3/4-8UN-2A 10 1984 2021
600 2-8UN-2A 10 3135 3208
18 150/300 1-1/2- 8UN-2A 20 826 937
600 1-3/4-8UN-2A 20 1785 2021
20 150/300 1-3/4-8UN-2A 20 1401 2279
24 150/300 2-1/2-8UN-2A 12 5236 5089

18 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
Torque Requirements: Body / Bonnet Bolting [m.daN]
Body Bolts Torques in m.daN
Nominal
sizes (in)
ASME
Classes Sizes (in) Number
- body/bonnet: all materials
- bolts materials:
A 193 Gr B7 / A194 Gr 2H,
EN 1.7225 / A194 Gr 2H,,
A 193 Gr B7M / A194 Gr 2HM,
A 320 Gr L7 / A194 Gr 7,
A 193 Gr B16 / A194 Gr 7 or
A 453 Gr 660 / A194 Gr 7
- body/bonnet material:
stainless steel
- bolts materials:
A 453 Gr 660 /
A 194 GR 8
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B8 class 2 /
A 194 GR 8
2
3 x 2
4 x 2
300 3/4-10UNC-2A 614 22 22
600 3/4-10UNC-2A 622 35 35
2
900 7/8-9UNC-2A 821 33
1500 7/8-9UNC-2A 830 48
2500 1-1/4-8-UN-2A 655 88
3 x 2
4 x 2 900 - 1500 1-8UN-2A 845 72
3
4 x 3
6 x 3
300 3/4-10UNC-2A 818 29 29
600 3/4-10UNC-2A 822 35 35
900 1-1/4-8-UN-2A 676 122
1500 1-1/4-8-UN-2A 6110 177
32500 1-1/2-8UN-2A 6105 168
4
6 x 4
8 x 4
300 7/8-9UNC-2A 823 37
600 7/8-9UNC-2A 835 56
900 1-1/2- 8UN-2A 6120 194
1500 1-1/2- 8UN-2A 6185 299
42500 1-5/8-8UN-2A 8125 203
6
8 x 6
10 x 6
300 1-8UN-2A 844 70
600 1-8UN-2A 12 32 51
900 - 1500 1-3/4-8UN-2A 8185 301
62500 1-7/8 -8UN-2A 8190 309
8
10 x 8
12 x 8
300 1-1/4-8-UN-2A 871 114
600 1-1/4-8-UN-2A 12 65 105
900 1-3/4-8UN-2A 8185 301
1500 1-3/4-8UN-2A 8240 390
82500 1-3/4-8UN-2A 12 165 270
10
300 1-1/2-8UN-2A 8115 186
600 1-1/2-8UN-2A 12
900 1-3/4-8UN-2A 12 185 301
1500 1-3/4-8UN-2A 12 220 357
2500 2-8UN-2A 12 280 456
12
16 x 12
300 1-1/2-8UN-2A 8125 202
600 1-1/2-8UN-2A 12 115 186
900 1-1/2- 8UN-2A 16 125 202
1500 1-3/4-8UN-2A 16 220 357
12 2500 1-7/8 -8UN-2A 20 220 358
14
300 1-1/2-8UN-2A 8212 241
600 1-1/2-8UN-2A 12 212 241
900 2-8UN-2A 16 444 504
1500 2-1/2-8UN-2A 16 896 1017
16
300 1-1/2-8UN-2A 12 115 186
600 1-1/2-8UN-2A 16 125 202
900 1-1/2- 8UN-2A 20 150 243
1500 1-3/4-8UN-2A 20 260 422
2500 2-8UN-2A 24 265 432
18
300 1-3/8-8UN-2A 16 92 148
600 1-3/4-8UN-2A 16 205 333
900 2-1/4-8UN-2A 12 455 743
1500 2-1/2-8UN-2A 16 650 1064
20
300 1-3/8-8-UN 2A 24 100 163
600 1-3/4-8UN-2A 24 210 341
900 1-7/8-8UN-2A 24 400 651
24
300 1-3/4-8UN-2A 20 190 309
600 1-3/4-8UN-2A 26 240 390
900 2-1/2-8UN-2A 20 700 1146

Masoneilan 41005 Series Globe Valves Instruction Manual | 19
© 2020 Baker Hughes Company. All rights reserved.
Torque Requirements: Body / Bonnet Bolting [m.daN]
410A5, 410B5, or 410C5 High Capacity Design
Body Bolts Torques in m.daN
Nominal
sizes (in)
ASME
Classes Sizes (in) Number
- body/bonnet: all materials
- bolts materials:
A 193 Gr B7 / A194 Gr 2H,
EN 1.7225 / A194 Gr 2H,,
A 193 Gr B7M / A194 Gr 2HM,
A 320 Gr L7 / A194 Gr 7,
A 193 Gr B16 / A194 Gr 7 or
A 453 Gr 660 / A194 Gr 7
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B7 / A194 Gr 2H
A 453 Gr 660 / A 194
GR 8
- body/bonnet material:
stainless steel
- bolts materials:
A 193 Gr B8 class 2 /
A 194 GR 8
6150/300 1-8UN-2A 10 45 51
600 1-8UN-2A 12 43 48
8150/300 1-1/4-8-UN-2A 10 63 74
600 1 1/8 8 UN 2A 12 66 74
10 150/300 1-1/2- 8UN-2A 8170 172
600 1-1/2-8UN-2A 10 178 182
12 150/300 1-3/4-8UN-2A 12 110 123
600 1-3/4-8UN-2A 12 165 177
16 150/300 1-3/4-8UN-2A 10 269 274
600 2-8UN-2A 10 425 435
18 150/300 1-1/2- 8UN-2A 20 112 127
600 1-3/4-8UN-2A 20 242 274
20 150/300 1-3/4-8UN-2A 20 190 309
24 150/300 2-1/2-8UN-2A 12 710 690

20 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
7. Ac t uat or
For coupling operations of actuators on valves, it is
necessary as a preliminary:
• to position the plug (15) on its seat ring (13). (In no
case, one should not turn the plug on its seat, to
avoid any deterioration of tightness seat).
• connect a temporary air supply line to the
actuator.
7.1 Coupling of Actuator Type 88
No. 6 (Figure 15)
A. Tightly screw the two hex nuts (1) onto the plug
stem.
B. Push down the actuator and, at the same time,
screw on the yoke nut (33), then the bottom stem
connector (2). As soon as it becomes possible,
insert the valve stem into the actuator stem. The
stem must be inserted far enough so that when
there is no air in the actuator, the valve plug does
not touch the seat.
C. Tighten the yoke nut.
D. Unscrew the valve plug stem until the valve plug
comes into contact with the seat. Do not turn the
valve plug on the seat as this could damage the
sealing surfaces.
E. Supply air to the actuator until the stem has travelled
at least 10 mm.
F. Unscrew the plug stem the number of turns N1
specified in Figure 13.
In the case of 41405 valves, use the N2 valve so
ensure tightness of the pilot plug.
G. Screw the 2 nuts (1) as far as they will go and check
that operation is correct.
H. Use the pointer (7) to set the travel scale (9) to the
closed valve position.
7.2 Coupling of Actuator Type 87
No. 6 (Figure 15)
A. Tightly screw the two hex nuts (1) onto the plug
stem.
B. Push down the actuator and, at the same time,
screw on the yoke nut (33), then the bottom stem
connector (2). As soon as it becomes possible,
insert the valve stem into the actuator stem. The
stem must be inserted far enough so that, when there
is air in the actuator, the valve plug does not touch the
seat.
C. Tighten the yoke nut.
D. Supply air to the actuator at the initial pressure of
spring range.
E. Use the pointer (7) to set the travel scale (9) to the
open valve position.
F. Supply the actuator with air at a high enough pressure
to obtain a travel equal to the nominal travel of the
valve.
In the case of the 41405 valves, reduce the travel
by value A indicated in Figure 14.
G. Unscrew the plug stem until the valve plug is in
contact with the seat. Do not turn the valve plug on
the seat as this could damage the sealing surfaces.
H. Screw the 2 nuts (1) as far as they will go and check
that operation is correct.
7.3 Coupling of Actuator Type 87
No. 10, 16 and 23 (Figure 15)
A. Tightly screw hex nut (1) onto the plug stem.
B. Screw the top stem connector assembly tightly onto
the actuator stem.
C. Push down the actuator and, at the same time, screw
on the yoke nut (33), then the bottom stem connector
assembly by screwing until they come into contact
with the hex nut (1).
D. Push down the actuator and tighten the yoke nut.
E. Supply the actuator with air at the initial pressure
indicated on the spring scale.
F. Position the stem connector assembly at distance “X”
indicated in Figure 12.
G. Use the pointer (7) to set the travel scale (9) to the
open valve position.
H. Supply the actuator with air at a high enough pressure
to obtain a travel equal to the nominal travel of the
valve
In the case of the 41405 valves, reduce the travel
by value A indicated in Figure 14.