Baker Hughes Masoneilan MiniTork II 37002 Series User manual

Masoneilan™
37002 Series MiniTork™II
Heavy Duty Control Buttery Valve
with Actuator Model 35
Instruction Manual (Rev.A)
Baker Hughes Data Classication : Public

ii | Baker Hughes Copyright 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 37002 Series MiniTork II with Actuator 35 Instruction Manual | 1
Copyright 2020 Baker Hughes Company. All rights reserved.
Table of Contents
Safety Information.....................................................................................................................2
About this Manual .....................................................................................................................2
Useful Life Period......................................................................................................................2
Warranty .....................................................................................................................................2
Principle of Operation...............................................................................................................3
Installation..................................................................................................................................3
Actuator......................................................................................................................................5
Changing Actuator Position Changing Valve Action...............................................................5
Air-To-Open / Air-To-Close ....................................................................................................6
Actuator Stem Adjustment .....................................................................................................6
Valve Maintenance ....................................................................................................................7
Body Disassembly and Reassembly......................................................................................7
Packing Replacement ............................................................................................................8
Figures ...................................................................................................................................9
Parts Reference .....................................................................................................................10
Adding Packing ......................................................................................................................11
Lubrication..............................................................................................................................11
Actuator Maintenance...............................................................................................................11
Diaphragm Replacement .......................................................................................................11
Actuator Disassembly ............................................................................................................11
Actuator Reassembly.............................................................................................................11
Actuator Figures and Parts Reference...................................................................................12

2 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
Safety Information
Important - Please read before installation
These 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.
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.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
could result in serious injury.
Indicates a potentially hazardous situation which, if not avoided,
could result in minor or moderate injury.
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’s
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 37002
Series MiniTork II control valves, and do not apply for other
valves outside of this product line.
Useful Period
The current estimated useful life period for the 37002 Series
MiniTork II control valves 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.
• All surrounding pipe lines must be thoroughly flushed to
ensure all entrained debris has been removed from the
system.
• 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.

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 3
Copyright 2020 Baker Hughes Company. All rights reserved.
Principle of Operation
MiniTork is a compact, flangeless, butterfly valve, designed to
reduce dynamic torque, bending of working parts and play. The
low torque applied to the disk is symmetrical around the shaft.
Fluid can flow through the valve in both directions owing to the
symmetry of the valve body and the disk with reversed blades.
The disk is driven by a stainless steel, monobloc shaft firmly
supported by two bearings inside the body and a ball bearing
in the support. The ball bearing takes up the axial thrust of the
shaft resulting from the pressure in the piping and ensures that
the disk is centered. Power is provided by a rotating diaphragm
spring actuator (see Figure 1).
The actuator can be mounted either in air-to-close mode (the
valve opens on air failure), or in air-to- open mode (the valve
closes on air failure).
With its long bonnet built into the body, the MiniTork valve
is capable of handling a wide range of temperatures. The
bonnet offers a large radiant surface to normalize the packing
temperature. This means that a single grade of self-lubricating
packing (PTFE fibers braided around a kevlar core) can be used
from -130°C to + 260°C (from -200°F to +500°F).
When insulating a valve, take care not to insulate the bonnet.
Installation
Preliminary Steps
Before installing the valve in the line, clean piping of all foreign
material such as welding chips, scale, oil, grease or dirt.
Note the details given on the nameplate for reference at a later
date. When ordering spare parts, always quote the serial number
as well as the valve model number.
Valve Body
1. The MiniTork valve is flangeless and is designed to ANSI
300 lb class. It can be installed between flanges machined
to the following standards:
ANSI: 125, 150, 250, and 300 lb.
AFNOR: PN 10, PN 16, PN 25 and PN 40.
DIN: ND 10, ND 16, ND 25 and ND 40.
2. Special bosses are provided on the body to help center the
valve correctly in the line and prevent any rotation before
tightening the flange bolts.
3. Use flat- or raised-face, welding-neck flanges with a bore
size equal to the inner diameter of the line. When the valve
is equipped with an elastomer sleeve, the flange bore equals
the inner diameter of the sleeve and the flange faces must
entirely cover the sleeve faces (see Figure 2).
Figure 1 - Schematic Diagram

4 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
4. Before placing the valve in the line, install the lower flange
bolting to provide a kind of cradle. This will help support the
valve while installing the remaining bolts.
5. If the valve is installed in “air-to-close” mode, close it
manually (using the handwheel) or by applying air pressure
to the actuator.
6. Center the valve in the line (fit gaskets if the valve does not
have a sleeve). Tighten the bolt nuts regularly and in a cross
configuration. Although the elastomer sleeve does not have
a lapped joint, it does provide perfect sealing.
Note: Valves with elastomer sleeves must be closed
when they are installed to ensure even compression all
over the sleeve.
7. Operation under negative pressure: The MiniTork sleeve is
made of hard elastomer and cast on a steel ring. It slips
into the body and can withstand negative pressures and
high flow rates with no pressure equalizing line and with no
bonding of any kind to the body.
8. For insulated installations, proceed as shown in Figure 3.
9. Turn the disk several times to check that it does not touch
the flanges or piping.
Figure 2
MiniTork with elastomer Sleeve
Figure 3
Insulation for a MiniTork Valve

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 5
Copyright 2020 Baker Hughes Company. All rights reserved.
Actuator
The actuator is mounted and adjusted as specified on the order
and requires no further adjustment.
Note: Before putting the valve into operation, back off the
handwheel so that it will not interfere with the operation of
the valve and tighten the handwheel lock (40).
Changing Actuator Position
(Figure 4)
For each valve action (air-to-open or air-to-close) the actuator
may be mounted in its standard position parallel to the pipe
for lowest profile, or in any of three other positions (see Figure
4). Actuator position is usually determined by adjacent piping,
obstacles of various types or air piping arrangements.
1. Bypass the MiniTork valve and relieve fluid pressure from
the body.
2. In the case of an “air-to-open” valve, pressurize the actuator
such that the lever (35) takes an intermediate position.
3. Remove bottom cover (30), front cover (21) and rear cover
(18).
4. Remove clip (22) and back off the clevis pin (24). Loosen
set screw (37).
5. Disconnect air (or electric) lines from the actuator (or its
accessories).
6. If a positioner is mounted on the actuator, remove the cam.
(Caution: see instructions for positioner before removing
cam). If the valve is not supplied with a positioner, remove
screw (27) and shaft cover (26).
7. Remove the nuts (13) from the packing box studs (17) and
yoke studs (14).
8. Pull out together the yoke (34), packing box flange (16) and
lever (35).
9. Refit the actuator and yoke assembly in the new position,
chosen from one of four possible positions for each valve
action.
Note: If the actuator and yoke are to be rotated 90°,
change the position of the packing box and yoke studs
90°. If the actuator and yoke are moved 180° from their
original position, the packing box and yoke studs are
not moved.
10. Reassemble the yoke (34), packing box flange (16) and
lever (35), adjusting their position relative to the actuator. Be
sure that the lever has enough clearance to allow the plug
to fully seat and unseat the valve. If necessary, adjust the
lever accordingly.
11. Move lever (35) as far as possible along the shaft in the
direction of the valve body. Tighten the set screw (37). Move
the lever (35) and plug shaft (8) out until the shaft shoulders
on the shaft bearing (25). Loosen set screw (37) and move
the lever along the shaft until it contacts the shaft bearing.
Retighten set screw (37). Hand tighten the two packing box
stud nuts (13) to ensure even compression of packing flange
(16). The two packing box nuts should be finger tightened
plus one full turn.
12. Reconnect air lines to the actuator and pressurize it such
that the lever (35) takes a position as outlined in the
paragraph below: “Actuator Stem Adjustment”. Disconnect
air lines from the actuator.
13. If a positioner is mounted on the valve, the cam must be
refitted (see instruction sheet of positioner). If no positioner
is mounted on the valve, refit shaft cover (26) with screw
(27). Reconnect air (or electric) lines to the actuator (or its
accessories). Refit covers (30), (18) and (21).
If necessary, refer to instruction sheet of positioner for
calibration. Put the valve into operation.
Changing Valve Action
Proceed as follows:
1. By-pass the MiniTork valve and relieve fluid pressure from
body. Remove the front cover (21), rear cover (18) and
spring barrel boss cover (33).
2. Pressurize the actuator such that the lever (35) takes an
intermediate position. Remove clevis pin clip (22) and clevis
pin (24) and release the pressure.
3. Remove cap screws (101) and lock washers (102). Separate
actuator and install it on opposite side of yoke (34) with
cap screws (101) and lock washers (102), applying proper
torques. Refer to table of Figure 5 for proper screw torque
values according to actuator size.
4. Reverse the position of limit stop (11) on lever (35). The limit
stop must always be fitted on the opposite side from the
clevis (100). It is set to the 43 mm position (see Figure 6).
5. Remove retaining ring (38) and washer (39). Remove
handwheel (41), handwheel lock (40) and handwheel thread
plug (36). Install handwheel (41) and handwheel lock (40)
on opposite side of yoke from actuator. Replace washer
(39), retaining ring (38) and handwheel thread plug (36).
6. Connect an air line to the actuator and make a zero
adjustment of actuator and lever (35) as outlined under
“Actuator Stem Adjustment”.
7. Reconnect air (or electric) lines to the actuator or its
accessories). Refit covers (18), (21) and (33).

6 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
Actuator Stem Adjustment
(Figure 6)
The position of the clevis (100) in relation to the actuator lever
(35) is set in the factory and requires no further adjustment
unless the type of valve action has been modified. If, when
changing the position of the actuator-support assembly, the disk
arm (35) is correctly positioned on the shaft, simply make a slight
adjustment to the travel indicator (54).
If the clevis bore is not aligned with the disk arm bore when the
valve is closed, loosen lock nut (111A) and screw or unscrew the
clevis (100).
Figure 4
Changing Actuator Position
Air-To-Open
Valve Closes on Air Failure
Air-To-Close
Valve Opens on Air Failure
Note: The Body is Behind the Actuator

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 7
Copyright 2020 Baker Hughes Company. All rights reserved.
Valve Maintenance
MiniTork butterfly valves are a standard line of control valves, i.e.
standard parts and materials cover a wide range of applications.
If emergency repairs ever become necessary, parts can probably
be taken from any MiniTork valve of the same size in your stock.
In addition, some parts such as packing, bearings (for the same
shaft diameter) are the same for Camflex, MiniTork and Ball
valves
Body Disassembly
(Figures 5, 6, and 7)
1. Bypass the MiniTork valve and relieve fluid pressure from
the body. Disconnect air (or electric lines) from the actuator
(or its accessories) and remove the valve from the line
Note: In the case of an air-to-close valve, turn the
handwheel or apply air pressure to set the disk to the
closed position.
2. Remove front cover (21), rear cover (18) and bottom cover
(30).
3. Remove clip (22) and back off the clevis pin (24). Remove
air supplied at step 1.
4. If a positioner is mounted on the valve, disconnect the cam
from the plug shaft (8) (Caution: see instruction sheet of
positioner before removing cam). If the valve is not equipped
with positioner, remove the screw (27) and the shaft cover
(26). Remove screws (101) and lock washers (102), then
remove the actuator from the yoke (34).
5. Before continuing the disassembly procedure, mark the
exact position of the arm (35) on the shaft (light punch mark,
pencil mark, etc.).
Note: the slot located at the end of the shaft indicates
the position of the disk in the valve body.
6. Loosen the cap screw (37) and remove the nuts (13) from
the packing box studs (17) and the yoke studs (14). Using a
mallet, gently tap the side of the yoke on the body end and
remove the yoke (34) and lever (35) assembly.
7. Drive out the disk studs (4) and remove the shaft from
the valve body. If this proves difficult, remove the packing
(10), then by using a pipe nipple of suitable size between
the flange and disk arm tightened firmly on the shaft, and
reversing the packing flange and nuts (13), the shaft may be
drawn out of the body by unscrewing nuts (13) (See Figure
3).
8. Remove the valve body (4), the packing-box ring (9) and
the spacer tube (7). If the valve body has an elastomer
sleeve (2), remove the sleeve and the two O-rings (3).
Lastly, disengage the bearings (6) and the spring (50).
(There is no spring (50) on valves with an elastomer sleeve.
See Figure 5).
9. Examine all parts for damage due to erosion corrosion or
wear. Replace all defective parts, pins (51) and all packing.
Clean all reused parts thoroughly prior to reassembly.
Body Reassembly
(Figures 5 and 6)
1. Fit the spring (50) (only on valve bodies without sleeve)
and the lower bearing in the body. Coat the shaft (8) with
Molykote G (or equivalent) along the entire surface roughly
corresponding to the spacer tube
2. If the valve is equipped with a sleeve, coat the two O-rings
(3) with silicone grease and fit them inside the sleeve. Slide
the sleeve into the body and align the shaft entry bore holes
with those of the body (see Figure 5).
3. Slip the upper bearing and spacer tube onto the shaft. Place
the disk in its normal position inside the body and feed
the shaft all the way into the body, together with the parts
previously fitted with it.
Note: The pin holes in the disk must be facing the
packing box. If the valve is equipped with a sleeve, coat
the perimeter of the disk with silicone grease so that the
disk can be fitted more easily.
4. Secure the body assembly on a vise and lock the disk in the
closed position (i.e. disk centerline on the plane of the body).
Note: If the shaft and disk are reused, check that the pin
hole taper matches that of the shaft holes.
If reusing the shaft and disk, fasten the two parts together
using new pins.
Note: When replacing a shaft, the old disk may be used as
a guide for drilling and reaming the pin holes. If a new disk
is required, the holes of the old shaft cannot be used. For
this reason, a new disk may not be ordered without a shaft.
5. Install the packing box ring (9), the packing (10) and the
packing gland (15). The oblique section of each ring must be
shifted 120° in relation to that of the previous ring.
6. Slip the yoke (34) some of the way over the end of the shaft,
at the same time fitting the following parts in the order shown
below: packing box flange (16), disk arm (35) and ring (5).
Lastly, finish fitting the yoke on the studs (14) by fitting the
shaft into the bearing (25). Apply the lever (35) against the
spacer tube (5) and tighten the yoke nuts (13). Screw the
packing box nuts onto the studs (17) but do not tighten them.
Note:
a) During this operation, make sure that the position of the
yoke on the studs complies with the action and position
selected for the actuator.
b) Also make sure that the arm (35) is in the correct
position on the shaft. Refer to the markings made during
disassembly. If parts have been replaced, assess their
final relative position by holding them one in front of the
other before fitting them. For this purpose, if the shaft
or disk or both have been replaced and the two parts
are not pinned together, remember to align the slot at
the end of the shaft with the disk (the disk being locked
in the closed position).

8 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
7. Insert two identical shims between the disk and the valve
body, on either side of the shaft (except for valves equipped
with a sleeve). If a new disk and/or shaft has/have been
fitted, pull the shaft until it shoulders on the ball bearing (25)
using a washer of suitable dimensions and a socket head
cap screw (dimensions given in Figure 7). Make sure that
the slot at the end of the shaft is still aligned with the disk.
8. Fit the actuator and tighten it using cap screws (101) and
lock washers (102) to the torque value indicated in Figure 5.
9. If the limit stop (11) has been removed, it must be refitted
at the 43 mm setting, then locked using the nut (20) on the
opposite side from the clevis (100) (see Figure 6).
10. Couple the clevis and the actuator on the arm (35) as follows:
a) For air-to-open valves:
Place the lever (35) so that the disk (4) is in the closed
position and fit the clevis (100) on the lever (35). Fit the
clevis pin (24) and then the clips (22).
Lock the nut (111A) and screw (37).
b) For air-to-close valves:
Apply enough pressure to the actuator for the clevis to
travel 184 mm.
Place the lever (35) so that the disk (4) is in the closed
position and fit the clevis (100) on the lever (35).
Fit the clevis pin (24) and then the clips (22).
Lock the nut (111A) and screw (37)
11. When fitting a new disk and/or shaft, pin the disk to the
shaft as follows:
Drill and ream two holes through the disk and shaft following
the indications given in the following table. Insert the pins
(51) and drive them home using a press or hammer. Make
sure that the disk is properly supported during this operation
to avoid accidental shaft bending.
Rated Valve Sizes
Drilling
Diameter (in.)
American
Taper
Reamer
Reference
mm in.
50 to 150 2 to 6 No. 19(.166)
Dia. No. 2
200 to 300 8 to 12 1/4 No. 5
12. Fasten the travel indicator (23) onto the lever (35) on two
spacer tubes (29) using a screw (53).
Fit the front cover (21) and check the position of the indicator
(23) with the valve closed.
Adjust if necessary.
13. Remove the screw (27) and washer (26) from the end of
the shaft.
If the valve is equipped with a positioner, refit and calibrate
it. Otherwise, refit the shaft cover (26) using the screw (27).
14. For valves equipped with a handwheel:
Remove the plug (36) and screw on the handwheel
assembly. Refit the washer (39) and the handwheel Truarc
pin (38).
The handwheel is always mounted on the opposite side
from the actuator (see Figure 5).
15. Refit the other covers.
16. Refit the valve on the line and put into operation.
Note: For air-to-close valves, set the disk to the closed
position using the handwheel or by applying air
pressure before refitting the valve.
Packing Replacement
1. Disconnect air (or electric) lines from the actuator (or its
accessories) and depressurize the valve.
2. Remove yoke (34), lever (35), actuator assembly and
packing box flange (16) and gland (15) using procedure
outlined under “Body Disassembly” above.
3. Extract worn packing using an extractor and replace with
new packing, (see table below). Press down the packing.
4. Reassemble the actuator assembly, yoke, lever,and packing
box gland and flange. Tighten packing box nuts evenly finger
tight plus one full turn.

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 9
Copyright 2020 Baker Hughes Company. All rights reserved.
Figures
Actuator
Size
Cap Screw (101)
Required Torque
(min. - max. daN. m)
Cap Screw (106)
Required Torque
(min. - max. daN. m)
74.0 - 11 4.0 - 11
97.0 - 10 7.0 - 10
Figure 5
MiniTork Valve Body
Figure 6
Yoke, Actuator and Handwheel
Figure 7
Extracting the Shaft
.250-28 Socket Head Cap Screw - .75 in. (19mm) long
Flat Washer: .25 in (6mm) thick
2.5 in. (65mm) O.D.: .266 in. (7mm) I.D.
Pipe
nipple

10 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
Parts Reference
Ref. No. Qty Part Name Ref. No. Qty Part Name
1 1 Body 34 1 Yoke
2 1 Sleeve 35 1 Lever S/A
m 32 O-ring 35A 1 Roller Bearing Pin
41 Disk 36 1 Handwheel Thread Plug
5 1 Lever Spacer Tube 37 1 Lever Cap Screw
6 2 Bearing 38 1 Handwheel Truarc Pin
7 1 Spacer Tube 39 1 Handwheel Washer
8 1 Shaft 40 1 Handwheel Lock
9 1 Packing Box Ring 41 1 Handwheel
l 10 1Packing 42 1Direction Plate
11 1 Limit Stop 43 2Plate Screw
12 2 Plate Screw q 50 1 Spring
13 4Stud Nut 51 2 Pin
14 2 Yoke Stud 52 1 Warming Plate
15 1 Packing Gland 53 2 Indicator Screw
16 1 Packing Flange 54 1 Indicator
17 2 Packing Flange Stud 100 1 Clevis
18 1 Rear Cover 101 4Cap Screw
V19 4Cover Screw 102 4Lock Washer
20 1 Lock Nut 103 1 Spring Barrel
21 1 Front Cover S/A 104 1 Spring
22 2 Clevis Pin Clip l 105 1 Diaphragm
23 1 Indicator Dot 106 4Cap Screw
24 1Clevis Pin 107 1 Diaphragm Case
25 1 Ball Bearing 108 1 Piston
26 1 Shaft Cover 110 1 Ring
27 1 Cover Screw 111 1 Lock Nut
29 2 Indicator Spacer Tube 111A 4Lock Nut
30 1 Bottom Cover
l Recommended Spare Parts
V Actuator No. 9 Only
m Body with Sleeve
q Body without Sleeve
31 1 Nameplate
33 1 Boss Cover

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 11
Copyright 2020 Baker Hughes Company. All rights reserved.
Adding Packing
This operation can be done without removing the yoke and
actuator assembly. It is necessary, as with packing replacement,
to bypass the valve and remove pressure from the valve.
1. Remove packing box nuts and move the flange (16) and
gland (15) close to the lever.
2. Insert new packing ring (10), retighten nuts and put the valve
into operation.
Lubrication
Periodically lubricate the following parts with Molykote G or other
suitable grease:
1. Roller bearing pin (35A).
2. Handwheel thread (41).
Note: Do not lubricate the external surface of the
roller bearing in lever (35). Also the ball bearing (25) is
permanently packed with grease and needs no further
lubrication.
Actuator Maintenance
Diaphragm Replacement
(Figures 8 to 10)
Actuator Disassembly
1. Bypass the valve and shut off stop valves.
2. Remove four cap screws (106) and remove diaphragm
case (107). Remove diaphragm (105) and rubber cement,
which holds diaphragm in place on the piston (108). Use an
acetone-based diluent if necessary.
Actuator Reassembly
1. Apply coating of Neoprene glue (or similar) on the bead
and on the inner face of the diaphragm (105), on the piston
(108) and in the spring barrel lip (103). (The inner face of
the diaphragm in contact with the piston is marked “Piston
Side” ; be careful to keep coating of Neoprene within limits
corresponding to flat part of piston (see Figure 9).
2. Center and place the diaphragm on the piston. Apply coating
of talc to outer surface of diaphragm (see Figure 9).
3. Roll the diaphragm carefully inside the spring barrel (103)
until the bead engages the spring barrel lip. Press the bead
lightly and evenly to make the two Neoprene-coated parts
stick together. Check that there is no twisting of diaphragm
inside spring barrel (see Figure 10).
4. Fit diaphragm case (107) to the spring barrel after checking
that air connection is on the correct side and that the
threaded holes of the diaphragm case and the holes of the
spring barrel line up. The bead must be clamped between
lips of diaphragm case and spring barrel (see figure 11).
Tighten four cap screws (106).
Valve Size (mm) 50 80 100 150 200 250 300
Number of Rings 7777666

12 | Baker Hughes Copyright 2020 Baker Hughes Company. All rights reserved.
Actuator Figures and Parts Reference
Figure 8 - Actuator Model 35
Figure 9
Figure 10 Figure 11
Ref. Qty Part Name Ref. Qty Part Name Ref. Qty Part Name
100 1Clevis 104 1Spring 108 1Piston
101 4 VCap Screw l 105 1Diaphragm 110 1Washer
102 4 VLock Washer 106 4Cap Screw 111 1Lock Nut
103 1Spring Barrel 107 1Diaphragm 111A 1Lock Nut
l Recommended Spare Parts
V Qty 4 on Valves wth No. 6 or 7 actuator

Masoneilan 37002 Series MiniTork II with Actuator 35 Instruction Manual | 13
Copyright 2020 Baker Hughes Company. All rights reserved.
Notes

Tech Field Support & Warranty:
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bakerhughes.com
Copyright 2020 Baker Hughes Company. All rights reserved. Baker Hughes provides this information on an
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or use. Baker Hughes hereby disclaims any and all liability for any direct, indirect, consequential or special
damages, claims for lost prots, or third party claims arising from the use of the information, whether a claim
is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to make changes in specications
and features shown herein, or discontinue the product described at any time without notice or obligation.
Contact your Baker Hughes representative for the most current information. The Baker Hughes logo
Masoneilan and MiniTork are trademarks of Baker Hughes Company. Other company names and product
names used in this document are the registered trademarks or trademarks of their respective owners.
BHMN-35-37002-MiniTork-IOM-32726A-0620 06/2020
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