Baker Hughes Consolidated 4900 Series User manual

Consolidated™
4900 MPV Series
Pilot Operated Safety Relief Valve
Instruction Manual (Rev. B)
Baker Hughes Data Classification : Public

2 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

Consolidated 4900 MPV Series POSRV Manual | 3
© 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 (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.

NOTICE!
For any service questions not covered
in this manual, please contact your local
Green Tag™ Center (GTC).
All the United States Customary System (USCS) values are
converted to metric values using the following conversion
factors:
USCS Unit Conversion Factor Metric Unit
in. 25.4 mm
lb. 0.4535924 kg
in26.4516 cm2
ft3/min 0.02831685 m3/min
gal/min 3.785412 L/min
lb/hr 0.4535924 kg/hr
psig 0.06894757 barg
ft lb 1.3558181 Nm
°F 5/9 (°F-32) °C
Conversion Table
Note: Multiply USCS value with conversion factor to get metric value.
4 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

Contents
I. Product Safety Sign and Label System..................................7
II. Safety Precautions ..................................................8
III. Safety Notice ......................................................10
IV. Warranty Information ...............................................11
V. Terminology for Pilot Operated Safety Relief Valves ......................12
VI. Handling and Storage ...............................................13
VII. Pre-Installation and Installation Instructions ............................13
VIII. Introduction .......................................................13
IX. Consolidated 4900 Series POSRV .....................................14
A. 4900 Series Main Valve Construction ...............................................14
B. 49PV07/37 Pilot Valve Construction ................................................15
C. 49MV07 Pilot Valve Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
D. 49MV22/72 Pilot Valve Construction ................................................21
X. General Planning for Maintenance ....................................24
XI. Recommended Installation Practices ..................................25
A. Mounting Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
B. Inlet Piping ................................................................... 25
C. Outlet Piping.................................................................. 26
D. Remote Sensing............................................................... 27
E. Freeze Protection.............................................................. 27
XII. Disassembly of the 4900 POSRV ......................................28
A. Removal of Pilot Valve From Main Valve ............................................ 28
B. Disassembly of Main Valve ...................................................... 28
C. Cleaning ..................................................................... 30
XIII. Maintenance Instructions ............................................31
A. General Information .............................................................31
B. O-Ring Seat ...................................................................31
C. Re-Machining Nozzle Seats ......................................................31
D. Machining Procedure: O-Ring Seat .................................................31
XIV. Inspection and Part Replacement .....................................33
1. Guide: ...................................................................... 33
2. Base: ....................................................................... 33
3. Coverplate: .................................................................. 33
4. O-Ring Retainer: .............................................................. 33
5. Spring: ...................................................................... 33
6. Nozzle ...................................................................... 33
7. O-Ring Seated Disc: ........................................................... 33
8. Disc Holder: ................................................................. 33
XV. Reassembly of 4900 Series Main Valve.................................34
A. Lubricants and Sealants ........................................................ 34
B. Assembly Procedure for O-Ring Seats ............................................. 34
B.1 Installation of Nozzle ........................................................ 34
B.2 Disc to Guide seal .......................................................... 35
B.3 Guide and Disc Assembly (D, E, F, G, H, J, K, & 3” L) .............................. 35
B.4 Guide and Disc Assembly (4” L, M, N, P, Q, R, T, 3” F.B., 4” F.B, 6” F.B., 8” F.B., & 10” F.B.) 36
Consolidated 4900 MPV Series POSRV Manual | 5
© 2020 Baker Hughes Company. All rights reserved.

XVI. Disassembly of 4900 Series Pilot Valve ................................37
A. 49PV07 and 49PV37 ............................................................37
B. 49MV07 ......................................................................41
C. 49MV22/72 .................................................................. 45
D. Cleaning ..................................................................... 50
XVII. Inspection and Part Replacement of Pilot Valve .........................51
A. 49PV07/37 ....................................................................51
B. 49MV07 ......................................................................51
C. 49MV22/72 .................................................................. 52
XVIII. Reassembly of 4900 Series Pilot Valve .................................53
A. Lubricants and Sealants ........................................................ 53
B. Assembly of 49PV07/37......................................................... 53
C. Assembly of 49MV07 ........................................................... 56
D. Assembly of 49MV22/72 ........................................................ 60
XIX. Setting and Testing .................................................63
A. Pilot Valve Testing ............................................................. 63
B. Pilot Valve Test Stand .......................................................... 63
C. Pilot Valve Test Procedure ....................................................... 63
D. Pilot/Main Valve Assembly Testing ................................................ 66
D.1 49PV07/37 ................................................................ 66
D.2 49MV07, 49MV22 and 49MV72 ............................................... 66
D.3 Reasons for failure: ......................................................... 67
E. Troubleshooting Leakage........................................................ 67
F. Field Testing of POSRV Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
F.1 Field Test Connection........................................................ 69
F.2 Pilot Valve Tester ........................................................... 69
G. Hydrostatic Testing and Gagging .................................................. 69
XX. Trouble Shooting ...................................................70
XXI. 4900 Series POSRV Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A. BackowPreventer .............................................................71
B. Field Test Connection ...........................................................71
C. Filter (High Capacity) ........................................................... 72
D. Gag ........................................................................ 72
E. Lifting Lever .................................................................. 72
F. Manual,ElectricalorPneumaticBlowdownValve ..................................... 72
G. Pilot Valve Tester .............................................................. 73
H. PressureDi󰀨erentialSwitch...................................................... 73
I. Remote Sensing............................................................... 73
XXII. Maintenance Tools and Supplies ......................................74
A. Adjuster Top Seal Insertion Tool ...................................................74
B. Insert Installation Tool ...........................................................75
C. Main Valve Nozzle Wrench .......................................................76
XXIII. Replacement Parts Planning .........................................77
A. Basic Guidelines .............................................................. 77
B. IdenticationandOrderingEssentials .............................................. 77
C. PositiveIdenticationofMainValveandPilotValveCombinations.........................78
XXIV. Genuine Consolidated Parts .........................................78
XXV. Recommended Spare Parts ..........................................79
XXVI.Field Service, Repair and Training Program .............................82
A. Field Service ................................................................. 82
B. Factory Repair Facilities......................................................... 82
C. Safety Valve Maintenance Training ................................................ 82
6 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

I. Product Safety Sign and Label System
Ifandwhenrequired,appropriatesafetylabelshavebeenincludedin
the rectangular margin blocks throughout this manual. Safety labels are
verticallyorientedrectanglesasshownintherepresentative examples
(below),consistingofthreepanelsencircledbyanarrowborder.The
panels
cancontainfourmessageswhichcommunicate:
• The level of hazard seriousness
• The nature of the hazard
• Theconsequenceofhuman,orproduct,interactionwiththehazard.
• Theinstructions,ifnecessary,onhowtoavoidthehazard.
Thetoppaneloftheformatcontainsasignalword(DANGER,
WARNING, CAUTION or ATTENTION)whichcommunicatesthelevelof
hazard seriousness.
Thecenterpanelcontainsapictorialwhichcommunicatesthenature
of the hazard, and the possible consequence of human or product
interactionwiththehazard.Insomeinstancesofhumanhazardsthe
pictorialmay,instead,depictwhatpreventivemeasurestotake,suchas
wearingprotectiveequipment.
Thebottompanelmaycontainaninstructionmessageonhowtoavoid
the hazard. In the case of human hazard, this message may also contain
a more precise definition of the hazard, and the consequences of human
interactionwiththehazard,thancanbecommunicatedsolelybythe
pictorial.
DANGER — Immediate
hazardswhichWILLresultin
severe personal injury or death.
WARNING — Hazards or
unsafepracticeswhichCOULD
result in severe personal injury
or death.
CAUTION — Hazards or
unsafepracticeswhichCOULD
result in minor personal injury.
ATTENTION — Hazards or
unsafepracticeswhichCOULD
result in product or property
damage.
1
2
3
4
Do not remove bolts
if pressure in line, as
this will result in
severe
personal injury
or death.
1
Know nuclear “health
physics” procedures,
if applicable, to avoid
possible severe
personal injury
or death.
2
Wear necessary
protective equipment
to prevent possible
injury
3
Handle valve
carefully. Do not
drop or strike.
4
Consolidated 4900 MPV Series POSRV Manual | 7
© 2020 Baker Hughes Company. All rights reserved.

II. Safety Precautions
Read – Understand – Practice
1. DANGER: High temperature/pressure can
cause injury. Be sure all system pressure is
absent before repairing or removing valves.
2. DANGER: Don’t stand in front of valve outlet
whendischarging.STANDCLEAROFVALVEto
prevent exposure to trapped, corrosive media.
3. DANGER: When inspecting a pressure relief
valveforleakage.BEVERYCAREFUL!
1. WARNING: Allowthesystemtocooltoroom
temperature before cleaning servicing or
repairing the system. Hot components or fluids
can cause severe personal injury or death.
2. WARNING: Alwaysreadandcomplywithsafety
labels on all containers. Do not remove or deface
the container. Do not remove or deface the
container labels. Improper handling or misuse
could result in severe personal injury or death.
3. WARNING: Never use pressurized fluids/gas/air
to clean clothing or body parts. Never use body
parts to check for leakage or discharge rates of
areas. Pressurized fluids/gas/air injected into or
near the body can cause severe personal injury
or death.
4. WARNING: Itistheresponsibilityoftheowner
to specify and provide guarding to protect
persons from pressurized or heated parts.
Contactwithpressurizedorheatedpartscan
result in severe personal injury or death.
5. WARNING: Donotallowanyoneunderthe
influenceofintoxicantsornarcoticstoworkon
or around pressurized systems. Workers under
the influence of intoxicants or narcotics are a
hazard both to themselves and other employees
and can cause severe personal injury or death to
themselves or others.
6. WARNING: Incorrect service and repair could
result in product or property damage or severe
personal injury or death.
Note: Any Service questions not covered in this
manual should be referred to your local Green
Tag Center (GTC).
Improper use or repair
of pressurized device
may result in severe
personal injury
or death.
Provide and
use guarding to
prevent contact
with heated and/or
pressurized parts.
XXX
Do not work
with valves while
under influence
of intoxicants or
narcotics.
Heed all
container label
warnings
Do not remove bolts
if pressure in line, as
this will result in
severe personal injury
or death.
8 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

II. Safety Precautions (Cont.)
7. WARNING: These WARNINGS are as complete
as possible but not all-inclusive. Baker Hughes
cannotknowallconceivableservicemethods
nor evaluate all potential hazards.
8. WARNING: Useofimpropertoolsorimproper
use of right tools could result in personal injury
or product or property damage.
9. WARNING: This valve product line is not
intended for radioactive nuclear applications.
Some valve products manufactured by
Baker Hughes may be used in radioactive
environments. Consequently, prior to starting
any operation in a radioactive environment, the
proper “health physics” procedures should be
followed,ifapplicable.
1. CAUTION: Heedallservicemanualwarnings.
Read installation instructions before installing
valve(s).
2. CAUTION: Wearhearingprotectionwhen
testing or operating valves.
3. CAUTION: Wear appropriate eye and clothing
protection.
4. CAUTION: Wear protective breathing apparatus
to protect against toxic media.
Note: Any Service questions not covered in this
manual should be referred to your local Green
Tag Center (GTC).
Restoring Safety
Appropriate service and repair important to safe,
reliable operation of all valve products. Restoration
to original quality and manufacturing specifications
willaccomplishthedesiredresults.Procedures
developed by Baker Hughes as described in the
applicable installation and Maintenance Manual,
whencorrectlyapplied,willbeeffective.
Heed all service manual
warnings. Read
installation instructions
before installing
valve(s).
Know nuclear “health
physics” procedures,
if applicable, to avoid
possible severe
personal injury or
death.
All potential hazards
may not be covered
in this manual.
Wear necessary
protective equipment
to prevent
possible injury.
Always use
appropriate
restoration
procedures.
Improper tools or
improper use of right
tools could result in
personal injury or
product damage.
Consolidated 4900 MPV Series POSRV Manual | 9
© 2020 Baker Hughes Company. All rights reserved.

III. Safety Notice
Proper installation and start-up is essential to the safe and reliable operation
of all valve products. The relevant procedures recommended by Baker
Hughes, and described in these instructions, are effective methods of
performing the required tasks.
It is important to note that these instructions contain various “safety
messages”whichshouldbecarefullyreadinordertominimizetheriskof
personalinjury,orthepossibilitythatimproperprocedureswillbefollowed
whichmaydamagetheinvolvedBakerHughesproduct,orrenderitunsafe.
It is also important to understand that these “safety messages” are not
exhaustive.BakerHughescannotpossiblyknow,evaluate,andadviseany
customerofalloftheconceivablewaysinwhichtasksmightbeperformed,
orofthepossiblehazardousconsequencesofeachway.Consequently,
Baker Hughes has not undertaken any such broad evaluation and, thus,
anyonewhousesaprocedureand/ortool,whichisnotrecommendedby
Baker Hughes, or deviates from Baker Hughes recommendations, must be
thoroughlysatisfiedthatneitherpersonalsafety,norvalvesafety,willbe
jeopardized by the method and/or tools selected. Contact your local Green
Tag Center (GTC) if there are any questions relative to tools/methods.
The installation and start-up of valves and/or valve products may involve
proximity to fluids at extremely high pressure and/or temperature.
Consequently, every precaution should be taken to prevent injury to
personnel during the performance of any procedure. These precautions
should consist of, but are not limited to, ear drum protection, eye protection,
andtheuseofprotectiveclothing,(i.e.,gloves,etc.)whenpersonnelare
in,oraround,avalveworkarea.Duetothevariouscircumstancesand
conditionsinwhichtheseoperationsmaybeperformedonBakerHughes
products,andthepossiblehazardousconsequencesofeachway,Baker
Hughes can not possibly evaluate all conditions that might injure personnel
or equipment. Nevertheless, Baker Hughes does offer certain Safety
Precautions, listed in Section II, for customer information only.
It is the responsibility of the purchaser or user of Baker Hughes valves/
equipmenttoadequatelytrainallpersonnelwhowillbeworkingwiththe
involved valves/equipment. For more information on training schedules
pleasecontactyourlocalGreenTagCenter(GTC).Further,priortoworking
withtheinvolvedvalves/equipment,personnelwhoaretoperformsuchwork
shouldbecomethoroughlyfamiliarwiththecontentsoftheseinstructions.
Wear necessary
protective equipment to
prevent possible injury
10 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

IV. Warranty Information
Warranty Statement
Warranty Statement:(1) BakerHugheswarrantsthatitsproductsandwork
willmeetallapplicablespecificationsandotherspecificproductandwork
requirements(includingthoseofperformance),ifany,andwillbefreefrom
defectsinmaterialandworkmanship.
CAUTION
Defective and nonconforming items must be
held for Baker Hughes’s inspection and returned
to the manufacturer upon request.
Incorrect Selection or Misapplication of Products: Baker Hughes cannot
be responsible for customer’s incorrect selection or misapplication of our
products.
Unauthorized Repair Work: Baker Hughes has not authorized any
non-Consolidated affiliated repair companies, contractors or individuals to
performwarrantyrepairserviceonnewproductsorfieldrepairedproducts
of its manufacture. Therefore customers contracting such repair services
fromunauthorizedsourcesmustdosoattheirownrisk.
Unauthorized Removal of Seals: Allnewvalvesandvalvesrepairedinthe
field by Baker Hughes Field Service are sealed to assure the customer of
ourguaranteeagainstdefectiveworkmanship.Unauthorizedremovaland/or
breakageofthissealwillnegateourwarranty.
1. Refer to Baker Hughes’s Standard Terms of Sale for complete
details on warranty and limitation of remedy and liability.
SEALED
Removal and/or
breakage of seal will
negate our warranty.
Defective and
nonconforming items
must be inspected
by Baker Hughes.
Consolidated 4900 MPV Series POSRV Manual | 11
© 2020 Baker Hughes Company. All rights reserved.

V. Terminology for Pilot Operated Safety Relief Valves
• Accumulation: The pressure increase over the
maximumallowableworkingpressureofthe
vessel during discharge through the POSRV,
expressed as a percentage of that pressure or in
actual pressure units.
• Backpressure: The pressure on the discharge
side of the POSRV:
– Built-up Backpressure: Pressure that develops
atthevalveoutletasaresultofflow,afterthe
POSRV has been opened.
– Superimposed Backpressure: Pressure in the
discharge header before the POSRV opens.
– Constant Backpressure: Superimposed
backpressurethatisconstantwithtime.
– Variable Backpressure: Superimposed
backpressurethatwillvarywithtime.
• Blowdown: Thedifferencebetweensetpressure
and reseating pressure of the POSRV, expressed
as a percentage of the set pressure or in actual
pressure units.
• Cold Differential Set Pressure: The pressure
atwhichthevalveisadjustedtoopenonthetest
stand. This pressure corrects for backpressure
whenapopactionpilot’sventispipedtothemain
valve outlet.
• Differential Between Operating and Set
Pressures: Valvesinprocessservicewill
generally give best results if the operating
pressure does not exceed 90% of the set
pressure.However,onpumpandcompressor
dischargelines,thedifferentialrequiredbetween
the operating and set pressures may be greater
because of pressure pulsations coming from a
reciprocating piston. The valve should be set as
far above the operating pressure as possible.
• Lift: Theactualtravelofthediscawayfromthe
closedpositionwhenavalveisrelieving.
• Maximum Allowable Working Pressure: The
maximum gauge pressure permissible in a vessel
at a designated temperature. A vessel may not be
operated above this pressure or its equivalent at
any metal temperature other than that used in its
design. Consequently, for that metal temperature,
itisthehighestpressureatwhichtheprimary
pressure POSRV is set to open.
• Operating Pressure: The gauge pressure
towhichthevesselisnormallysubjectedin
service.Asuitablemarginisprovidedbetween
operatingpressureandmaximumallowable
workingpressure.Forassuredsafeoperation,the
operating pressure should be at least 10% under
themaximumallowableworkingpressureor5psig
(0.34barg),whicheverisgreater.
• Overpressure: A pressure increase over the
set pressure of the primary relieving device.
Overpressureissimilartoaccumulationwhenthe
relieving device
issetatthemaximumallowableworkingpressure
of the vessel. Normally, overpressure is expressed
as a percentage of set pressure.
• Pilot Operated Safety Relief Valve (POSRV):
Apressurereliefvalveinwhichthemajorrelieving
deviceiscombinedwith,andiscontrolledby,a
self-actuated auxiliary pressure relief valve.
• Rated Capacity: The percentage of measured
flowatanauthorizedpercentoverpressure
permitted by the applicable code. Rated capacity
is generally expressed in pounds per hour (lb/hr)
or kilograms per hour (kg/hr) for vapors, standard
cubic feet per minute (SCFM) or cubic meters
per minute (m. /min) for gases, and in gallons
per minute (GPM) or Liter per minute (L/min) for
liquids.
• Safety Relief Valve (SRV): An automatic
pressure relieving device used as either a safety
or relief valve, depending upon application. The
SRV is used to protect personnel and equipment
by preventing excessive overpressure.
• Set Pressure: The gauge pressure at the valve
inlet,forwhichthereliefvalvehasbeenadjusted
to open under service conditions. In liquid service,
theinletpressureatwhichthevalvestartsto
discharge determines set pressure. In gas or
vaporservice,theinletpressureatwhichthevalve
pops determines the set pressure.
12 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.

VIII. Introduction
A pilot operated safety
relief valve (POSRV) is
a pressure relief valve in
whichthemajorrelieving
deviceiscombinedwith
and is controlled by a
self-activated auxiliary
pressure relief valve.
POSRV’s are used on
hundreds of different
applications, including
liquids and hydrocarbons,
therefore, the valve is
designed to meet any
requirements.
The 4900 Series valve included in this manual may
be used to meet the requirements for ASME Section
VIII. They cannot be used on ASME Section I steam
boilers or superheaters, but may be used on process
steam.
When POSRVs are
uncrated and the flange
protectors or sealing
plugs are removed,
exercise meticulous care
to prevent dirt and other
foreign materials from
entering the inlet and
outletportswhilebolting
the POSRV in place.
Do not subject valves
to sharp impact.
VI. Handling and Storage VII. Pre-Installation and
Installation Instructions
Handling
Alwayskeeptheinletflangedownonacratedor
uncrated flange valve to prevent misalignment and
damage to valve internals.
Pilot Operated Safety Relief Valves should be
handled carefully. The internal parts of a pilot
operated safety relief valve are precision machined
and fitted together to maintain perfect alignment.
Rough handling may damage the external
tubing, pilot, and main valve seats or may cause
misalignment sufficient to incur leakage or erratic
operation.POSRVsareshippedwithaprotective
covering over the inlet and the outlet flanges. This
is to prevent damage to the flanged surfaces and to
prevent entry of foreign material into the valve.
ATTENTION!
Neverliftthefullweightofthevalvebythe
pilot assembly, external devices or tubing.
ATTENTION!
Do not rotate the valve horizontally or lift/carry
using the pilot assembly.
ATTENTION!
Only lift the valve by the eyebolts inserted into the
coverplate.
ATTENTION!
Handle carefully. Do not drop or strike the valve
Storage
Store POSRVs in a dry environment and protect
themfromtheweather.Donotremovethevalve
from the skids or crates until immediately before
installation. Do not remove flange protectors and
seating plugs until the valve is ready to be bolted into
place during the installation, i.e., both inlet and outlet.
Always install
valve in a vertical,
upright position.
Consolidated 4900 MPV Series POSRV Manual | 13
© 2020 Baker Hughes Company. All rights reserved.
© 2016 General Electric Company. All rights reserved.

IX. Consolidated 4900 Series POSRV
M1
M2
M3
M4
M7
M6
M10
M11
M9
M12
M13
M14
M20M16
M15
M17 M18 M19
Figure 1: Main Valve Construction - Soft Seat
A. 4900 Series Main Valve Construction
14 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
Part
No. Nomenclature
M1 Base
M2 Base Plug
M3 Nozzle
M4 O-Ring (Nozzle)
M5 Retainer Nose1
M6 O-Ring (Seat)
M7 O-Ring Retainer
M8 Lockscrew1
M9 Guide Ring
M10 Disc
M11 O-Ring (Retainer Nut)
M12 O-Ring (Disc)
M13 Guide
M14 O-Ring (Coverplate)
M15 Base Stud
M16 Base Stud Nut
M17 Coverplate
M18 O-Ring (Guide)
M19 Sensing Element
M20 Retainer Nut
M21 Coverplate Plug1
M22 Eye Bolt1
1.Notshown

IX. Consolidated 4900 Series POSRV (Cont.)
B. 49PV07/37 Pilot Valve Construction
Consolidated 4900 MPV Series POSRV Manual | 15
© 2020 Baker Hughes Company. All rights reserved.
Figure 2: 4900 Series POSRV Assembly with 49PV07/37 Pilot
A
B
Manual
Blowdown
Field Test
Connector
Canister
Filter
A
CC
B
Backow
Preventor

IX. Consolidated 4900 Series POSRV (Cont.)
B. 49PV07/37 Pilot Valve Construction (Cont.)
16 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
P3 P4 P2 P6 P7 P6 P8 P9 P10 P11 P12 P14 P15 P1 P23 P18 P22 P20 P19 P21
P5 P13 P17 P16 P24 P25
P26
P33
P28
P31
P29
P32
P27
P30
P34
P47P50 P48P49 P47P46
P35
P36
P39
P38
P41
P42
P43
OUT OF
POSITION
P44 P45 P40
P37
Section B-B
Section A-A
W/O Filter or Remote Sensing
Section C-C
W/O Filter or Remote Sensing
Figure 3: 49PV07/37 Pilot Valve Construction

IX. Consolidated 4900 Series POSRV (Cont.)
Part
No. Nomenclature
P1 Main Base
P2 Bonnet
P3 CompressionScrew
P4 CompressionScrew
Lock Nut
P5 Cap(CompressionScrew)
P6 Spring Washer
P7 Spring
P8 CapScrew(TopPlate)
P9 Top Plate
P10 SetScrew(Bonnet)
P11 O-Ring (Top Plate)
P12 Main Piston
P13 Spring Seal (Main Piston)
P14 Insert Top
P15 Insert Bottom
P16 O-Ring (Insert)
P17 Spring Seal (Insert)
P18 Adjuster Top
P19 Adjuster Bottom
P20 Adjuster Lock Nut
P21 Adjuster Cap
P22 O-Ring (Adjuster Bottom)
P23 O-Ring (Adjuster Top)
P24 Spring Seal (Adjuster Top)
P25 Inlet Adapter
P26 O-Ring (Pilot Base)
P27 O-Ring (Inlet Adapter)
P28 Ball(BackflowPreventer)
P29 BackflowPreventerGuide
P30 BackflowPreventerBody
P31 Pipe Plug
(BackflowPreventer)
B. 49PV07/37 Pilot Valve Construction (Cont.)
Part
No. Nomenclature
P32 O-Ring(Backflow
Preventer)
P33 O-Ring (Ball Seat)
(BackflowPreventer)
P34 Breather Filter Vent
(Bonnet)
P35 ManualBlowdown
(Needle Valve)
P36 Ball (Field Test)
P37 Tube Filter
P38 Field Test Body
P39 Breather Filter Vent
(Field Test Body)
P40 O-Ring (Ball Seat)
(Field Test)
P41 O-Ring (Field Test Body)
P42 CapScrew
(Pilot Base/Inlet Adapter)
P43 CapScrew
(Inlet Adapter/Coverplate)
P44 Port Adapter
Part
No. Nomenclature
P45 CapScrew
(Port Adapter/Pilot Base)
P46 Pipe Plug (Port Adapter)
P47 O-Ring (Port Adapter)
P48 Ball (Base)
P49 Spring (Base)
P50 O-Ring (Ball Seat)
Optional Canister Filter
A1 Filter Base
A2 O-Ring (Filter Base)
A3 Filter Element
A4 Filter Spring
A5 Filter Sleeve
A6 O-Ring (Filter Sleeve)
A7 Filter End Cap
A8 Filter Tie Bolt
A9 O-Ring (Filter Tie Bolt)
A10 Locator Pin
A11 CapScrew(Filter)
A12 O-Ring(CapScrew)
A13 Pipe Plug (Filter)
Consolidated 4900 MPV Series POSRV Manual | 17
© 2020 Baker Hughes Company. All rights reserved.
OUT OF
POSITION
A8 A7 A9 A1
A13 A9 A4 A3 A5 A6 A11 A12 A10A2
Figure 4: Canister Filter (Optional)

IX. Consolidated 4900 Series POSRV (Cont.)
C. 49MV07 Pilot Valve Construction
18 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.
A
A
CC
BB
Manual
Blowdown
Field Test
Connector
Canister
Filter
Backow
Prevento
r
Figure 5: 4900 Series POSRV Assembly with 49MV07 Pilot

IX. Consolidated 4900 Series POSRV (Cont.)
C. 49PV07/37 Pilot Valve Construction (Cont.)
Consolidated 4900 MPV Series POSRV Manual | 19
© 2020 Baker Hughes Company. All rights reserved.
P3 P4 P2 P6 P6 P8 P9 P11 P12 P10 P14 P15 P1 P23 P18 P22 P20 P19 P21P7
P5 P34 P13 P17 P16 P24 P25
P27
P32
P29
P30
P28
P31
P33
P36
P49
P48
P59
P50
P67
P58
P60
P71
P59
P61
P66
P68
P63
P65
P62
P64
OUT OF
POSITION
P57 P70 P40
P35
P39
P38
P41
P42
P43
P36
P37
Section B-B
Section A-A
W/O Filter or Remote Sensing
Section C-C
Modulator Assembly
Figure 6: 49MV07 Pilot Valve Construction

IX. Consolidated 4900 Series POSRV (Cont.)
C. 49PV07/37 Pilot Valve Construction (Cont.)
Part
No. Nomenclature
P1 Main Base
P2 Bonnet
P3 CompressionScrew
P4 CompressionScrewLockNut
P5 Cap(CompressionScrew)
P6 Spring Washer
P7 Spring
P8 CapScrew(TopPlate)
P9 Top Plate
P10 SetScrew(Bonnet)
P11 O-Ring (Top Plate)
P12 Main Piston
P13 Spring Seal (Main Piston)
P14 Insert Top
P15 Insert Bottom
P16 O-Ring (Insert)
P17 Spring Seal (Insert)
P18 Adjuster Top
P19 Adjuster Bottom
P20 Adjuster Lock Nut
P21 Adjuster Cap
P22 O-Ring (Adjuster Bottom)
P23 O-Ring (Adjuster Top)
P24 Spring Seal (Adjuster Top)
P25 Inlet Adapter
P26 O-Ring (Pilot Base)
P27 O-Ring (Inlet Adapter)
P28 Ball(BackflowPreventer)
P29 BackflowPreventerGuide
P30 BackflowPreventerBody
P31 PipePlug(BackflowPreventer)
P32 O-Ring(BackflowPreventer)
Part
No. Nomenclature
P33 O-Ring(BallSeat)(BackflowPreventer)
P34 Breather Filter Vent (Bonnet)
P35 ManualBlowdown(NeedleValve)
P36 Ball (Field Test)
P37 Tube Filter
P38 Field Test Body
P39 Breather Filter Vent (Field Test Body)
P40 O-Ring (Ball Seat) (Field Test)
P41 O-Ring (Field Test Body)
P42 CapScrew(PilotBase/InletAdapter)
P43 CapScrew(InletAdapter/Coverplate)
P48 Ball (Base)
P49 Spring (Base)
P50 O-Ring (Ball Seat)
P57 Modulator Base
P58 Modulator Stop
P59 O-Ring (Modulator Base)
P60 O-Ring (Modulator Stop)
P61 Modulator Piston Top
P62 Modulator Piston Bottom
P63 Spring Seal (Piston Top)
P64 Spring Seal (Piston Bottom)
P65 Spring Seal (Modulator Piston Bottom)
P66 O-Ring (Modulator Seat)
P67 O-Ring Retainer
P68 LockScrew(Retainer)
P69
CapScrew
(Modulator Stop)
(NotShown)
P70 SocketHeadCapScrew
(Modulator)
P71 Pipe Plug
(Modulator)
20 | Baker Hughes © 2020 Baker Hughes Company. All rights reserved.