Baker Hughes Masoneilan 74000 Series User manual

74000 Series
Erosion Resistant Control Valves
Instruction Manual (Rev.A)
BHGE Data Classification : Public
Masoneilan*

b | BHGE © 2018 Baker Hughes, a GE 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, BHGE (BAKER
HUGHES, A GE 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 BHGE.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF BHGE 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 BHGE 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 TO ANY THIRD PARTY WITHOUT THE
WRITTEN APPROVAL OF BHGE.

Masoneilan 74000 Series Control Valves Instructions Manual | 1
© 2018 Baker Hughes, a GE company. All rights reserved.
Table of Contents
Safety Information ........................................................................................2
About this Manual ............................................................................................ 2
Life Period.................................................................................................... 2
Warranty..................................................................................................... 2
Introduction ...............................................................................................3
Scope ........................................................................................................ 3
Serial Plate ................................................................................................... 3
After Sales Service ........................................................................................... 3
Spare Parts................................................................................................... 3
Actuator and Accessories..................................................................................... 3
Numbering System ........................................................................................3
Unpacking .................................................................................................4
Installation ................................................................................................4
Piping Cleanliness ............................................................................................ 4
Isolation Bypass Valve ........................................................................................ 4
Heat Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Hydrostatic Testing and Line Cleaning......................................................................... 4
Flow Direction................................................................................................ 4
Welded Connections ......................................................................................... 4
Pre-Weld Preparation................................................................................... 4
Welding Process ........................................................................................ 4
Post Weld Cleaning & Assembly......................................................................... 4
Actuator Assembly ........................................................................................... 4
Disassembly ...............................................................................................5
Valve Actuation............................................................................................... 5
Disconnect Instrumentation .................................................................................. 5
Air-to-Retract Actuators ...................................................................................... 5
Threaded Connection ................................................................................... 5
Stem Connector ........................................................................................ 5
Air-to-Extend Actuators ...................................................................................... 5
Actuator Removal ............................................................................................ 5
Valve Disassembly............................................................................................ 5
Maintenance & Repair .....................................................................................6
Packing Box .................................................................................................. 6
PTFE Packing ................................................................................................. 6
Valve with Graphite Packing .................................................................................. 7
Parts Repair .................................................................................................. 7
Seating Surfaces.............................................................................................. 7
Gaskets ...................................................................................................... 7
Valve Plug and Stem S/A ...................................................................................... 7
Seat Ring S/A and Venturi S/A ................................................................................. 7
Valve Reassembly..........................................................................................7
Body Bolting.................................................................................................. 8
Parts References ............................................................................................10
Actuation....................................................................................................10
Type 87/88 Multi-Spring Diaphragm Actuators ...............................................................10
Type 51/52/53 Cylinder Actuators ............................................................................13

2 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Safety Information
Important - Please Read Before Installation
Masoneilan 74000 Series control valves 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
BHGE'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
74000 Series control valves, and do not apply for
other valves outside of this product line.
Life Period
The current estimated useful life period for the
Masoneilan 74000 Series 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 BHGE 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 BHGE recommended usages.
BHGE reserves the right to discontinue manufacture
of any product or change product materials, design or
specifications without notice.
This instruction manual applies to the Masoneilan
74000 Series control valves.
The Control 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 74000 Series Control Valves Instructions Manual | 3
© 2018 Baker Hughes, a GE company. All rights reserved.
Introduction
Scope
The following instructions are designed to guide the
user through the installation and maintenance of
the Masoneilan 74000 Series control valves.
The Masoneilan 74000 Series product is part of BHGE’s
Engineered Product portfolio, and is custom designed
to fit our customer’s most difficult applications.
This document provides detailed installation and
maintenance instructions for all sizes, ratings and
trim types used in the 74000 Series product line.
Serial Plate
The serial plate is usually fixed to the side of the
actuator yoke. It indicates information about the
valve including size and type, pressure class rating,
body/bonnet material, and serial number.
After Sales Service
BHGE offers After Sales Service comprised of highly
qualified technicians to support the installation
operation, maintenance and repair of its equipment.
For support contact the local BHGE representative or
Masoneilan factory located closest to you.
Spare Parts
Only Masoneilan replacement parts should be used
when carrying out maintenance operations. Obtain
replacement parts through local BHGE representatives
or Masoneilan Parts Department.
When ordering spare parts, the MODEL AND SERIAL
NUMBERS indicated on the manufacturer’s serial plate
MUST BE GIVEN. The serial plate is on the side of the
actuator yoke.
Actuator and Accessories
Actuators and other valve accessories have their
own instruction manuals, that provide information
and details on the assembly and installation. Refer
to the appropriate instruction manual for each
unique accessory.
Numbering System
2nd
7
5th
4th3rd
2nd
1st 6th
1st
7
0 Unbalance
4 Metal Seal
Ring and
Metal Seat with
Auxiliary Plug
5 Metal Seal Ring
and Metal Seat
9 Graphite
Seal Ring and
Metal Seat
Seal Type
Body Series
74 Erosion
Resistant
Control
Valve
Options
F Forged
Body
Design
EB Extension
Bonnet
0 Undefined
1 Trim A,
Balanced
2 Trim B,
Balanced
3 Trim C,
Balanced
4 Trim A,
Unbalanced
5 Trim B,
Unbalanced
6 Trim C,
Unbalanced
Trim Type
1 Single
Stage
2 Double
Stage
No. of Stages (1)
51 Cylinder
Double-Acting
52 Cylinder
Spring-Return
Air to Close
53 Cylinder
Spring-Return
Air to Open
87 Spring-Diaphragm
Air to Close
88 Spring-Diaphragm
Air to Open
Actuator Type
(1) Additional stages are available to meet specific operating conditions. Please consult BHGE.
Trim A, High CV, Low ΔP
Trim B, Moderate CV and ΔP
Trim C, Low CV, High ΔP

4 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Unpacking
Care must be exercised when unpacking the valve to
prevent damage to the accessories and component parts.
Contact the local BHGE Sales Office or Service Center
with any issues or problems. Be sure to note the valve
model number and serial number in all correspondence.
Installation
The 74000 Series control valve must always be
installed with the flow tending to close the valve plug.
For applications where insulation of the valve body is
required, do not insulate the valve bonnet.
Piping Cleanliness
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 mating surfaces
must be thoroughly cleaned to ensure leak-free
joints. Sacrificial start-up fixtures can be purchased
from BHGE to protect the operational trim during the
installation and line flushing phases.
If major system or piping modifications (or repairs)
are performed, thorough flushing and blowdown
of the system will be required prior to reinstalling the
74000 Series trim. Sacrificial flushing trim should be
installed in this valve to protect the integrity of the flow
passages. Failure to follow this warning will violate the
valve warranty agreement and could result in control
instability, excessive noise levels, and valve leakage.
Isolation Bypass Valve
To allow for in-line inspection, maintenance and removal
of the valve without service interruption, provide a
manually operated shutoff valve on each
side of the control valve and a manually operated
throttling valve in the bypass line.
Heat Insulation
In case of a heat-insulated installation, do not insulate
the valve bonnet and take protective measures relative
to personal safety.
Hydrostatic Testing and Line Cleaning
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 damage or failure of the seal rings could
result. Flushing and hydrostatic test equipment can be
purchased from the Masoneilan factory.
Flow Direction
The valve must be installed so that the process fluid will
flow through the valve in the direction indicated by the
flow arrow located on the body.
Welded Connections
Carefully review the information in this section prior
to welding any valves inline. Refer any additional questions
to the local BHGE Sales Office or Service Center.
Pre-Weld Preparation
Carefully follow the installation steps defined in
the sections noted above prior to performing weld
procedures.
Welding Process
Perform welding process in accordance with the
standard requirements for the materials and weld
construction of the specific valve. Apply post weld
heat treatment if required.
Internal valve components should be removed prior
to performing any post weld heat treatment in order to
prevent damage. If unable to remove the elastomeric
components, then other methods must be employed
to prevent the local temperature around the seals
from exceeding the maximum material limits (typically
450°F/232°C for teflon-based materials).
Post Weld Cleaning & Assembly
Inspect the body, bonnet, and trim components for
cleanliness and surface condition. Remove any foreign
materials, such as weld chips, slag or scale. Make sure
there are no nicks, scratches, burrs or sharp corners on
sealing and sliding surfaces. Clean all gasket interface
surfaces and reassemble using new gaskets to ensure
sealing integrity.
Actuator Assembly
Assemble the actuator onto the control valve using
the appropriate instructions for the specific actuator
model and type. Connect air pressure lines to the
actuator ports to meet intended operating mode
(i.e., air-to-extend, air-to-retract, or double-acting).

Masoneilan 74000 Series Control Valves Instructions Manual | 5
© 2018 Baker Hughes, a GE company. All rights reserved.
Disassembly
Prior to performing any maintenance on the valve,
isolate the valve and vent the process pressure.
Valve Actuation
Access to the internal components of the valve should
be accomplished with the actuator removed. Follow
the detailed instructions below and refer to the
appropriate actuator instruction manuals.
Actuator may be pre-loaded with tension from
air pressure or springs. Prior to disconnecting
instrumentation read all instructions for the
specific actuator.
Disconnect Instrumentation
Disconnect all mechanical connections between the
positioner and the other instruments. Disassemble the
valve stem and actuator stem coupling as described in
the following sections.
Air-to-Retract Actuators
Apply sufficient air pressure to the actuator to retract
the stem completely. Disconnect the plug stem from
the actuator stem depending on the connection type as
described below.
Threaded Connection
Unscrew the plug stem from the actuator stem, making
sure the plug never contacts the seating area (liner or
seat ring) at any time during disassembly.
Contact between the plug and seating area during
this disassembly process may cause damage to the
seating surfaces. It may be necessary to disassemble
the actuator yoke from the valve bonnet and lifting
the actuator off the valve to avoid plug to seating
surface contact.
Stem Connector
Remove the screws and disassemble the stem
connector from the valve and actuator stems.
Air-to-Extend Actuators
For this actuator configuration, the valve plug is already
in the fully retracted position without any air pressure
applied.
Disconnect the plug stem and actuator stem as
described in the threaded connection and stem
connector sections above depending on the connection
type.
Actuator Removal
Disconnect all electrical and air connections to and from
the actuator. Disassemble yoke nut or yoke attachment
screws, and lift the actuator off of the valve being
careful not to damage the bonnet threads.
Valve Disassembly
The valve must always be reassembled with new
packing set and gaskets. Before disassembly, make
sure the recommended spare parts are available
for reassembly.
1. Disconnect the piping to the leak detector
connection on the bonnet (if applicable).
2. Remove the body stud nuts (8) from the bottom
flange (1) of the valve body. Refer to Figure 1 for
reference to valve assembly.
Figure 1: 74000 Series
Trim Configuration
Valve plug and stem S/A (3), seat ring S/A (4), and venturi
S/A (5) are all made from hard materials and have brittle
properties. Extreme care should be used while removing
these parts to prevent chipping and breaking.
3. Disassemble the bottom flange (1), including the
venturi S/A (5) from the valve body as a single unit.
Inspect the venturi S/A (5) to ensure it is free from
defects including early signs of erosion, such as
scratches and wear.
Note: the venturi S/A (5) is a two-piece
assembly made up of an outer piece and an
inner liner.
This assembly should be purchased as a

6 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
complete assembly.
4. Remove the first body gasket (6), the seat ring
S/A (4), and the second body gasket (6) from the
valve body (2). Inspect the seat ring S/A inner liner
to ensure it is free from defects including early
signs of erosion, such as scratches and wear.
Prior to removing the seat ring S/A (4), lift the plug and
stem S/A (3) off the seat and use caution to avoid
unnecessary contact to prevent chipping and breaking.
Note: The seat ring S/A (4) is a two-piece
assembly made up of an outer piece and an
inner liner. This assembly should be purchased
as a complete assembly.
5. Remove the packing flange nuts (18), packing
flange washers (17), and packing flange disc springs
(15). Next remove the packing flange (14) and the
packing follower (13).
6. Remove the plug and stem S/A (3) from the valve
body (2) by pulling downward through the valve
seat. Inspect the plug and stem S/A to ensure it is
free from defects including early signs of erosion,
such as scratches and wear.
Valve plug and stem S/A (3) is made from hard materials
and has brittle properties. Extreme care should be
used while removing this part to prevent chipping
and breaking.
7. Remove the old packing set (19), anti-extrusion
packing rings (11 and 12), packing spacer (10), and
lantern ring (9).
Note: Lantern ring (9) is only available for units
with the leak detector bonnet option.
8. Thoroughly inspect the body (2), plug and stem
S/A (3), seat ring S/A (4), venturi S/A (5), and
bottom flange (1) for any visual defects or damage.
Carefully inspect the dynamic sliding surfaces
and the seal interface areas.
Maintenance & Repair
The purpose of this section is to provide recommended
maintenance and repair procedures. These procedures
assume the availability of standard shop tools and
equipment.
Packing Box
Packing box maintenance is one of the principal tasks
during routine servicing. Tightness of the packing (19)
is maintained by proper compression. Compression
is achieved by evenly tightening the packing flange
nuts (18) against the packing flange (14). Periodic
re-tightening of the packing flange nuts may be required
to maintain proper sealing.
Care must be taken not to over tighten, as this could
create unnecessary friction preventing smooth valve
operation. If packing leakage persists after applying
maximum compression, then the packing needs to
be replaced.
The valve must be isolated and the process pressure
vented prior to performing any packing box
maintenance.
PTFE Packing
Kevlar®/PTFE, 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.
1. Unscrew and remove the packing flange nuts (18)
and packing bolt springs (15).
2. Lift the packing flange (14) and packing follower
(13) up along the valve stem.
3. By means of a puller, remove the packing set
(19), antiextrusion packing rings (11,12), packing
spacer (10), and lantern ring (9), being careful
not to damage the sealing surface of the
packing box or the valve plug stem.
4. Replace the packing rings, placing the cut in each
ring about 120° apart from the adjacent ring.
Press rings in one at a time.
5. Reassemble the packing follower (13) and the
packing flange (14).
6. Tighten the packing flange nuts (18) without
over compressing the packing rings.
7. Put the valve back into service and check
for leakage. Tighten packing flange nuts (18)
as required.

Masoneilan 74000 Series Control Valves Instructions Manual | 7
© 2018 Baker Hughes, a GE company. All rights reserved.
Seat Ring S/A and Venturi S/A
These sub-assemblies are each fit together using a heat
shrinking process. The seat and liner of each of these
assemblies should never be separated. The assemblies
must always be replaced as complete assemblies using
factory OEM parts.
Valve Reassembly
Make sure the valve body and gasket surfaces are clean
and free of any damage.
Make sure any recommended lubricants or sealing
compounds are compatible with the process fluid. Use
acceptable substitutes as required.
Valve plug and stem S/A (3), seat ring S/A (4), and venturi
S/A (5) are all made from hard materials and have brittle
properties. Extreme care should be used while removing
these parts to prevent chipping and breaking.
1. Apply a light film of fully synthetic motor oil around
the valve stem.
2. Install the plug and stem S/A (3) into the valve body
through the valve seat. Slide the plug and stem into
the body guiding area until it reaches a full stop.
Care should be taken not to scratch or damage the
surface of the stem.
3. Assemble the first body gasket (6) into the valve
body (2).
4. With the plug in the full lift position, carefully insert
the seat ring S/A (4) into the valve body ensuring
the plug is properly aligned with the center of the
seating area.
5. Slide the bottom anti-extrusion ring (11) onto the
valve stem through the upper extension area of
the valve body. Using a piece of soft material (such
as a plastic or cardboard cylinder), press the ring
down along the stem using caution to ensure the
part remains perpendicular to the bore axis. If the
ring doesn’t slide easily, wobble the stem slightly to
adjust for any misalignment.
6. Line the inner diameter of the packing set with a
light coat of lubricant, such as Nikal Nuclear Grade
anti-seize or equivalent, and slide the lower packing
set into the valve body along the stem. Periodically
slide the plug S/A (3) and seat ring S/A (4) to confirm
they move freely.
Valve with Graphite Packing
To replace Graphite packing, it is necessary to
separate the valve plug stem from the actuator stem.
1. Remove the packing flange nuts (18) and packing
bolt springs (15).
2. Lift the packing flange (14) and packing follower
(13) up along the valve stem.
3. By means of a puller, remove the packing set
(19), antiextrusion packing rings (11,12), packing
spacer (10), and lantern ring (9), being careful
not to damage the sealing surface of the
packing box or the valve plug stem.
4. Replace the packing set (19). Press a back-up ring
(carbon/graphite/Inconel braided ring) into the
bonnet (2). Next press the expanded graphite
rings into the packing area one at a time. Press an
additional back-up ring into packing area.
5. Reassemble the packing follower (13) and the
packing flange (14).
6. Tighten the packing flange nuts (18) without
overcompressing the packing rings.
7. Open and close the valve several times then
retighten the packing as required.
8. Put the valve back into service and check
for leakage. Tighten packing flange nuts (18)
as required.
Parts Repair
Carefully examine parts for any scratches, unusual wear,
or other visual damage prior to re-assembly.
Seating Surfaces
The seat ring S/A (4) and valve plug S/A (3) seating
surfaces must be completely free of dents, scratches,
wear, or other visual damage. Any seating surfaces
showing signs of minor deterioration must be replaced
with OEM parts from the factory.
Gaskets
Gasket seating surfaces must be free of dents,
scratches, corrosion, or other types of damage.
Clean mating surfaces as required and replace any
non-conforming parts. Spiral wound gaskets (4) must
always be replaced after disassembly.
Valve Plug and Stem S/A
The valve plug and stem assembly are closely set under
tight tolerances to prevent damage to the hardened
(and extremely brittle) parts. For this reason, the plug
and stem assembly must always be replaced together
as a complete assembly with factory OEM parts.

8 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
The body flange (1) and packing flange (14) should never
be tightened if the binding exists. Tightening of these
components could add stress to the trim parts and
result in fracturing or chipping.
7. Tighten the packing flange (14) only sufficiently to
prevent leakage of the process fluid.
Note: Do not over tighten the packing flange
(14) or friction may negatively impact the
control response of the valve.
8. Assemble the second body gasket (6) on top of the
seat ring S/A (4).
9. Insert the venturi S/A (5) into the bottom flange (1).
10. Assemble the bottom flange (1) over the valve body
(2) and align the bolt holes with the body studs (7).
Body Bolting
1. Grease the threads of the valve body studs (7) and
the bearing surfaces of the body nuts (8).
2. Assemble the body nuts (8) onto the body studs
(7) manually, and hand tighten evenly so that the
internal parts are held in place. The face of the body
flange (1) should be parallel to the top surface of
the valve body.
3. Tighten the body nuts (8) evenly by applying the
torque in the increments and the sequences as
defined on the factory assembly drawing.
4. Check plug and stem assembly in between various
tightening steps to make sure they are not binding
due to misalignment.
Note: Tighten the body nuts (8) in increments
of 25%, 50%, 75% and 100% of the total torque
requirements. Go through each sequence as
specified in Figure 2 below until the final torque
values are reached.
Visually inspect the assembly for proper stud and nut
installation by checking the number of exposed threads.
If less than one stud thread or more than 2-1/2 threads
are extended above the body nut after final tightening,
then double check assembly for proper installation and
alignment.
Figure 2: Torque Sequence

Masoneilan 74000 Series Control Valves Instructions Manual | 9
© 2018 Baker Hughes, a GE company. All rights reserved.
Figure 3: 74000 Series Control Valve

10 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
74000 Series Parts References
Item No. Description
1 Bottom Flange
2 Body
3 Plug and Stem S/A
4 Seat Ring S/A
5 Venturi S/A
• 6 Gasket
7 Body Stud
8 Body Nut
9 Lantern Ring if Applicable
10 Packing Spacer
• 11 Anti-Extrusion Packing
• 12 Anti-Extrusion Packing
13 Packing Follower
14 Packing Flange
15 Packing Disc Spring
16 Packing Flange Stud
17 Packing Flange Washer
18 Packing Flange Nut
• 19 Packing S/A
• Recommended spare parts for each maintenance interval
Table 1: 74000 Series Valve Parts List
Actuation
Type 87/88 Multi-Spring Diaphragm
Actuators
Connecting Type 87 (Air to Extend) No. 6 Actuator
(Figure 4)
1. Tightly assemble the hex nuts (1) onto the plug stem.
2. Push down the actuator, and screw on the yoke nut
(33) at the same time. Then assemble the bottom
stem connector (2). As soon as it becomes possible,
insert the valve stem into the actuator stem (10).
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.
3. Tighten the yoke nut (33).
4. Supply air to the actuator at the final pressure.
5. Use the pointer (7) to set the travel scale (9) to the
valve open position.
6. Supply the actuator with air at a sufficiently high
pressure to obtain a travel equal to the nominal
travel of the valve.
7. 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.
8. Screw the hex nuts (1) as far as they will go and
check that operation is correct.
Connecting Type 88 (Air to Retract) No. 6 Actuator
(Figure 4)
1. Tightly assemble the hex nuts (1) onto the
plug stem.
2. Push down the actuator, and screw on the yoke nut
(33) at the same time. Then assemble the bottom
stem connector (2). As soon as it becomes possible,
insert the valve stem into the actuator stem (10).
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.
3. Tighten the yoke nut (33).
4. 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.
5. Supply air to the actuator until the stem has
travelled at least .40 inches (10 mm).
6. Unscrew the plug stem by the number of turns N1
specified in Table 2.
7. Screw the hex nuts (1) as far as they will go and
check that operation is correct.
8. Use the pointer (7) to set the travel scale (9) to the
valve closed position.
Plug Stem
Diameter N1 (turn) in mm
1” 1.25 0.09 2.3
3/4” 1.25 0.08 2.0
5/8" 1.5 0.08 2.0
1/2” 1.5 0.075 1.9
Table 2: Type 88 Actuator, Air to Open - Valve Seating
Connecting Type 87 (Air to Extend) No. 10, 16 and 23
Actuators (Figure 4)
1. Tightly assemble hex nut (1) onto the plug stem.
2. Screw the top stem connector (4) assembly tightly
onto the actuator stem (10).
3. Push down the actuator, and screw on the yoke nut
(33) at the same time. Then assemble the bottom
stem connector (2) assembly by screwing until it

Masoneilan 74000 Series Control Valves Instructions Manual | 11
© 2018 Baker Hughes, a GE company. All rights reserved.
comes into contact with the hex nut (1).
4. Push down the actuator and tighten the yoke
nut (33).
5. Supply the actuator with air at the initial pressure
indicated on the spring scale.
6. Position the stem connector assembly at distance
“X” indicated in Table 3.
7. Use the pointer (7) to set the travel scale (9) to the
valve open position.
8. Supply the actuator with air at a high enough
pressure to obtain a travel equal to the nominal
travel of the valve.
9. With the plug correctly positioned on the seat,
unscrew the bottom stem connector (2) assembly
until it comes into contact with the top stem
connector (4). Tighten the socket head cap screws
(5), hex nut (1) and lock nut (32) and check that the
operation is correct.
Connecting Type 88 (Air to Retract) No. 10, 16 and
23 Actuator (Figure 4)
1. Supply the actuator with air to retract stem.
2. Unscrew the top stem connector (4) in accordance
with dimension “X” in Table 3.
3. Tightly assemble hex nut (1) onto the plug stem.
4. Tightly screw the top stem connector (4) assembly
onto the actuator stem (10).
5. Push down the actuator, and screw on the yoke nut
(33) at the same time. Then assemble the bottom
stem connector (2) assembly by screwing until it
comes into contact with the hex nut (1).
6. Push down the actuator and tighten the yoke
nut (33).
7. With the plug correctly positioned on the seat,
unscrew the bottom stem connector (2) assembly to
bring it into contact with the top stem connector (4).
8. Supply air to the actuator until the stem has
travelled at least 0.40 inches (10 mm).
9. Unscrew the top stem connector (4) by the number
of turns N1 specified in Table 2 then lock manually
with hex nut (1).
10. Release the pressure in the actuator. Use pointer
(7) to set the travel scale (9) to the actuator supply
pressure so that the two stem connectors come
into contact. Then tighten the socket head cap
screws (5), hex nut (1), and lock nut (32).
11. Shut off the closed valve pressure and check that
operation is correct.
Actuator
Size
Travel “X” Actuator
87
“X”
Actuator 88
in mm in mm in mm
10 0.8 20 5.12 130.0 4.62 117.3
10 1.5 38 5.44 138.2
16 0.8 20 8.00 203.2
7.02 178.3
16 1.5 38 8.50 228.6
16 2.0 51 9.28 235.7
16 2.5 63.5 9.50 241.3
23 0.8 20 8.25 209.5
23 1.5 38 8.62 218.9
23 2.0 51 9.12 231.6
23 2.5 63.5 9.59 243.6
Table 3: Position of Top Stem Connector
Parts Reference For Spring Diaphragm
Actuators - Type 87/88 Multispring
Item No. Description
1 Hex Nut
2 Stem Connector, Bottom
3 Cap Screw, Hex Head
• 4 Stem Connector, Top
• 5 Cap Screw, Socket Head
• 6 Connector Insert
7 Pointer
8 Screw, Pan Head
9 Scale, Travel
10 Actuator Stem
31 Yoke, Machining
• 32 Lock Nut
33 Yoke Nut
• Not provided for Size 6 Actuator
Table 4: 87/88 Actuator Parts List

12 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Figure 4: 87/88 Actuators
Type 87 Air to Close
No. 6
Type 88 Air to Open
No. 6
Type 87 Air to Close
No. 10-16-23
Type 88 Air to Open
No. 10-16-23
Model 87 Actuator
Air to Extend (Close)
Model 88 Actuator
Air to Retract (Open)

Masoneilan 74000 Series Control Valves Instructions Manual | 13
© 2018 Baker Hughes, a GE company. All rights reserved.
Type 51/52/53 Cylinder Actuators
Connecting Double Acting (Model 51) (Figures 7 & 8)
1. Install actuator on the valve body with drive nut.
2. Connect manual loading panel tubing to the
Top Plate (17).
3. Apply required air pressure through the manual
loading panel to completely extend the actuator
stem.
4. Reconnect manual loading panel tubing from the
Top Plate (17) to the Yoke (1), which is integrated
into the bottom plate connection.
5. Retract the actuator stem either pneumatically or
with a handwheel approximately .1” (2mm) using
the visual stroke scale as shown in Figure 5.
Figure 5
6. Assemble the Split Clamp (22).
Note: If the split clamp does not engage with
both stems, then retract the actuator stem until
alignment and engagement is achieved.
Make sure the valve is fully extended.
Figure 6
7. Assemble and tighten Indicator Arm (23), Spring
Lock Washers (25), and Hexagon Bolts (24).
8. Line up the indicator plate (26), with Indicator arm
(23) and check actuator for proper operation.
Connecting Air to Extend (Model 52) (Figure 9)
1. Install actuator on the valve body with drive nut.
2. Connect manual loading panel tubing to the top
plate (17).
3. Apply required air pressure through the manual
loading panel to completely extend the actuator
stem.
4. Extend the actuator stem either pneumatically or
with a handwheel approximately .1” (2mm) using
the visual stroke scale as shown in Figure 5.
5. Assemble the Split Clamp (22).
Note: If the split clamp does not engage with
both stems, then extend the actuator stem
until alignment and engagement is achieved.
Make sure the valve is fully extended.
6. Assemble and tighten Indicator Arm (23), Spring
Lock Washers (25), and Hexagon Bolts (24).
7. Line up the indicator plate (26), with Indicator arm
(23) and check actuator for proper operation.
Connecting Air to Retract (Model 53) (Figure 10)
1. Install actuator on the valve body with drive nut.
2. Connect manual loading panel tubing to the
yoke (1), which is integrated into the bottom
plate connection.
3. Retract the actuator stem either pneumatically or
with a handwheel approximately .1” (2mm) using
the visual stroke scale as shown in Figure 5l.
4. Assemble the Split Clamp (22).
Note: If the split clamp does not engage with
both stems, retract the actuator stem until
alignment and engagement is achieved.
Make sure the valve is fully retracted.
5. Assemble and tighten Indicator Arm (23), Spring
Lock Washers (25), and Hexagon Bolts (24).
6. Line up the indicator plate (26), with Indicator arm
(23) and check actuator for proper operation.

14 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Figure 7: Model 51 Actuator
Model 51 Double Acting
With handwheel without volume chamber
Model 51 Double Acting
With handwheel with volume chamber

Masoneilan 74000 Series Control Valves Instructions Manual | 15
© 2018 Baker Hughes, a GE company. All rights reserved.
Figure 8: Model 51 Actuator
Model 51 Double Acting
Without handwheel without volume chamber
Model 51 Double Acting
Without handwheel with volume chamber

16 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Figure 9: Model 52 Actuator
Model 52
Air to extend with handwheel
Model 52
Air to retract without handwheel

Masoneilan 74000 Series Control Valves Instructions Manual | 17
© 2018 Baker Hughes, a GE company. All rights reserved.
Figure 10: Model 53 Actuator
Model 53
Air to extend with handwheel
Model 53
Air to retract without handwheel

18 | BHGE © 2018 Baker Hughes, a GE company. All rights reserved.
Figure 11: CM, DM handwheel - Typical for models 51/52/53