Baker Hughes Mooney 21 Series User manual

Mooney™
Series 21 Regulator
Instruction Manual (Rev.A)
Baker Hughes Data Classication : Public

ii | Baker Hughes Copyright 2021 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.

Mooney Series 21 Regulator Instruction Manual | 1
Copyright 2021 Baker Hughes Company. All rights reserved.
Table Of Contents
Product Description ..................................................................................................................1
Materials of Construction .........................................................................................................2
Specications ............................................................................................................................2-3
Regulator Markings...................................................................................................................3
Nameplate Information..............................................................................................................3
Installation..................................................................................................................................4
Maintenance...............................................................................................................................5
Scope
This manual provides installation, operation and maintenance
instructions for the Mooney Series 21 Regulator. The manual is
divided into the following sections:
Product Description
Baker Hughes’s Mooney Series 21 Regulator is a pressure control
regulator designed for use in both gas and liquid applications.
Series 21 - Brass construction with 3 to 450 psi (0.20 bar - 31
bar) control pressure range.
Series 21H - High pressure brass construction with a 200 to 900
psi (14 bar - 62 bar) control pressure range.
Series 21S - Stainless steel construction with a 3 to 450 (0.20
bar - 31 bar) control pressure range.
Series 21HS - High pressure, stainless steel construction with a
200 to 900 psi (14 bar - 62 bar) control pressure range.
The parts in all constructions are interchangeable. The high
pressure constructions (Series 21H and 21HS) differ from the
Series 21 and 21S with the addition of a diaphragm spacer
assembly that reduces the effective area of the diaphragm and
increases the spring range of the black and green springs.
General Description
(Refer to Figure 1)
Spring Housing (1): The Regulator Spring Housing is provided
with a 1/4 inch NPT vent connection which may be piped to a
safe area or pressure loaded for remote control of the pressure
setting. The Spring Housing may also be pressurized for use in
differential pressure control or remote control applications. The
Main Spring may be changed by simply removing the Closing
Cap (1A).
Body Insert Assembly (2): A removable Body Insert Assembly
(cartridge), at the bottom of the Regulator Body, contains the
inner valve mechanism. The cartridge may be replaced with a
spare unit for fast trouble shooting or repair. The Body Insert
Assembly is also field repairable.
Sensing and Outlet Ports (3): The Series 21 Regulator has
combined SENSE and OUTLET connections.
Diaphragm Spacer Assembly (4): The addition of this assembly
converts the Series 21 & 21S Regulator into the high pressure
Series 21H & 21HS. It reduces the regulator diaphragm area and
increases the spring range of the black and green springs.

2 | Baker Hughes Copyright 2021 Baker Hughes Company. All rights reserved.
Table 1
Materials of Construction
Series 21 and 21S
Body & Spring
Housing Forged Brass or Stainless Steel
Body Insert &
Closing Cap Brass or Stainless Steel
Orifice Stainless Steel or Delrin
Plug & Stem Nitrile Stainless Steel
Diaphragm Nitrile/Nylon or Viton/Nylon
O-Rings Nitrile or Viton
Figure 1
Series 21 & 21S
Cartridge Bottom View all
Constructions
Series 21H & 21HS
4
3
2
2
1A
1
Table 2
Specifications
All Series 21 Regulators
Control Application Pressure Reducing (PRV)
Orifice Size .125 in (3.175 mm)
Connections 1/4 in NPTF
Temperature Working -20°F to 150°F
(-28°C to 65.7°C)Emergency
-40°F to 200°F
(-40°C to 93. 3°C)
Maximum Inlet Pressure 1500 psig (100 bar)
Maximum Outlet Pressure 1000 psig (70 bar)
Maximum Emergency
Sensing Pressure
1000 psig (70 bar)
Maximum SpringHousing
Pressure
1000 psig (70 bar)
Set Pressure Range 3-900 psig (0.2 - 62 bar)1
1 Refer to Table 3 for specific spring ranges.

Mooney Series 21 Regulator Instruction Manual | 3
Copyright 2021 Baker Hughes Company. All rights reserved.
Figure 2
Figure 3
Nameplate for Series 21, 21H, 21S, & 21HS
Mooney Regulators.
Figure 4
Spring Range Nameplate for Series 21 & 21S
Mooney Regulators.
Figure 5
Spring Range Nameplate for Series 21H & 21HS
Mooney Regulators.
Table 3
1
2
Specications
Series Spring Range Color Part Number
21 & 21S
3 - 12 psi (0.2 - 0.8 bar) Red 040-014-01
10 - 40 psi (0.7 - 2.7 bar) Plated 040-011-01
25 - 90 psi (1.7 - 6.2 bar) Blue 040-012-01
60 - 200 psi (4 - 14 bar) Purple 040-008-01
100 - 260 psi (7 - 18 bar) Black3040-009-01
200 - 450 psi (14 - 31 bar) Green3040-020-01
21H & 21HS 200 - 520 psi (14 - 36 bar) Black3040-009-01
400 - 900 psi (27 - 62 bar) Green3040-020-01
3 Spacer on Adjustment Screw Required
Regulator Markings
(Refer to Figure 2)
Location of the Regulator nameplate.
Location of spring range nameplate. The factory marks
the nameplate to indicate which spring is installed at
manufacture date. If the spring is changed make sure to
note it on the nameplate.
The month and year the regulator is manufactured is noted
on the Spring Case, Body, and Body Insert of the regulator. Item Definition
Mooney Regulator Trademarked name of regulator.
Series Model number of regulator.
Control Pressure The control pressure is limited to
the spring range of the spring on the
regulator (Refer to Fig. 4 for Series 21
& 21S regulators).
Sense & Outlet
Pressure
Maximum allowable pressure in
sense/outlet ports.
Inlet Pressure Maximum allowable pressure (psig) to
the Inlet port.
Spring Case (Vent)
Pressure
Maximum allowable pressure (psig) to
the Spring Case (Vent) port.
Bolt Torque Recommended bolt torque for spring
case in foot pounds.
Red, Plated, Blue,
Purple, Black and
Green
Each spring is color coded to indicate
the control pressure range.
Adjusting Screw
Spacer
The black and green springs require a
spacer on the adjusting screw to avoid
over compression.
3
SPRING RANGE
RED
PLATED
BLUE
PURPLE
*BLACK
3-12 PSI/0.2-0.8 BAR
10-40 PSI/0.7-2.7 BAR
25-90 PSI/1.7-6.2 BAR
60-200 PSI/4-14 BAR
100-260 PSI/7-18 BAR
200-450 PSI/14-31 BAR*GREEN
*ADJUSTING SCREW SPACER REQUIRED HIGH PRESSURE
SPRING RANGE
BLACK200-520 PSI/14-36 BAR
400-900 PSI/27-62 BARGREEN
ADJUSTING SCREW SPACER REQUIRED
1
2
3

4 | Baker Hughes Copyright 2021 Baker Hughes Company. All rights reserved.
Installation
Personal injury, equipment damage, leakage or explo-
sion of accumulated gas or bursting of pressure con-
taining parts, may result if this valve/ regulator is over-
pressured, or is installed where service conditions
could exceed the limits given in the specication of
this manual, or on the nameplate, or where conditions
exceed any ratings of the adjacent piping or piping
connections. Verify the limitations of valve, regulator
and pipeline to ensure no device is overpressured.
To avoid such injury or damage, provide pressure
relieving or pressure limiting devices (as required by
the U.S. code of Federal Regulations, by the National
Fire Codes of the National Fire Protection Associa-
tion, or by other applicable codes), to prevent service
conditions from exceeding those limits. Additionally,
physical damage to the regulator or tubing can cause
personal injury and/or property damage due to explo-
sion of accumulated gas. To avoid injury and damage,
install the valve in a safe location.
Gas regulators installed in conned or enclosed
spaces should be provided with adequate ventilation
to prevent the possibility of gas buildup or accumula-
tion from leaks and venting. Leaks or vented gas may
accumulate causing personal injury, death, or prop-
erty damage. Regulator spring cases and the regulator
enclosure should be vented to a safe area away from
air intakes, or any hazardous location. The vent lines
and stacks must be protected against condensation
and plugging.
Note: For Series 21 regulators, lubricate the adjusting
screw with a light, nitrile rubber compatible grease
such as Lubriplate #105, or equivalent, at rst oppor-
tunity, and thereafter, annually and during any interim
maintenance.
For Series 21 or 21H regulators (brass), inspect the clos-
ing cap for thread wear by verifying the torque required
to modify the set point is less than 6 ft-lbs (8.14 Nm) and
inspect for metal particles on the adjusting screw or on
the closing cap threads. This should be completed at the
rst opportunity, and thereafter, annually and during any
interim maintenance.
The Series 21 regulator with Purple, Black, or White with a
Green Stripe have higher tendency to wear due to higher
spring pressure. Spring range (color) is indicated on the
spring range label located on the regulator.
If it is determined that closing cap thread wear has oc-
curred, it is recommended that the cap and adjusting
screw be replaced with a Closing Cap Assembly. For Clos-
ing Cap Assembly retro-t kits, contact your local sales
representative for ordering information.
1. Personnel: Installation of the Series 21 Regulator on any
valve should be made by qualified personnel familiar with
high-pressure piping and Regulators.
2. Prior Inspection: Inspect the Regulator for any damage
that might have occurred in shipping.
3. Control Action: Inspect to make sure the Body Insert
Assembly (Cartridge) is in the correct operational mode.
4. Orientation: The Series 21 Regulator may be installed in any
position - the best position being one that provides easiest
access for regulator adjustment and valve maintenance.
Note: To avoid galling when stainless steel to stainless
steel connections are made, use a lubricant (such as
NEVER SEEZ®by Bostik). For best results Lightly
lubricate the female threads. Mixing the lubricant with
pipe dope is also acceptable. When tightening do not
exceed more than 1/4 turn past the point the threads
start to bind.
5. A Filter in the inlet line is recommended to remove dirt and
other particulates that could affect the variable orifice in
the regulator. Refer to the Type 30 Filter I/O/M manual for
installation instructions.

Mooney Series 21 Regulator Instruction Manual | 5
Copyright 2021 Baker Hughes Company. All rights reserved.
Maintenance
Regulator parts are subject to normal wear and must be inspected
and replaced as necessary. The frequency of inspection and
replacement of parts depends on severity of service conditions
and/or the requirements of local, state, and federal regulations.
Be certain that the name plates are updated to accurately indicate
any field changes in equipment, materials, service conditions, or
pressure settings.
Before disassembly, make sure the regulator has been
isolated from the process by closing block valves
on the inlet and outlet sides of the regulator. Safely
release pressure and process uid from the regulator
system. Failure to properly complete these steps may
result in personal injury and property damage.
1. After depressurizing the regulator and main valve, unscrew
and remove Body Insert Assembly.
2. Remove the Stem O-ring from the regulator body using
a suitable tool and being careful no to scratch the O-ring
Groove.
Figure 6
A paper clip easily extracts the O-Ring out
of the regulator body.
Note: A spare Body Insert Assembly may be installed and
the regulator returned to service if time is a factor. Make sure
the Stem O-Ring is in place in the Regulator Body before
installing the new Body Insert Assembly or, if removed, slip
a new O-Ring over the Stem of the Body Insert Assembly
prior to installing it in the Regulator Body.
Regulator Disassembly - All Series 21 Regulators
3. Remove the Bottom Cap from the Body Insert and remove
the internal parts. The Orifice Assembly can be easily
pushed out of the Body Insert using a heavy paper clip or
0.045” (1.14mm) diameter wire. See Figure 7.
Note: Do not scratch or damage the O-Ring sealing
surface of the Body Insert.
4. Inspect all parts for wear or damage.
5. Regulator Diaphragm: Release all Main Spring tension by
unscrewing Adjusting Screw. Remove Closing Cap, Spring
Follower, and Main Spring. Remove Spring Housing Cap
Screws and remove Diaphragm Assembly. Disassemble
Diaphragm Assembly and inspect Diaphragm. Replace if
necessary.
Figure 7
The orifice can be pushed out of the Body Insert
(Cartridge) using a paper clip.
Regulator Assembly - Series 21 & 21S
1. Diaphragm Assembly: Install the Regulator Diaphragm
with convex side toward Diaphragm Plate and Main Spring
(Refer to Figure 8). Tighten nut on the Diaphragm Retainer
to approximately 5 to 6 ft-lbs (6.78 - 8.14 n-m) torque.
Note: Overtightening will distort the Regulator
Diaphragm.
Figure 8
Diaphragm Assembly for the Series 21 & 21S Regulator.
2. Place Diaphragm Assembly in the regulator body with the
diaphragm touching the grooved sealing surface of the
regulator body. (Refer to Figure 9)
Figure 9
Placing Diaphragm Assembly on Regulator Body.
3. Place Spring Housing on Regulator Body with vent
connection in desired position.
Figure 10
Placing the Spring Housing on the Regulator Body.
4. Install Spring Housing Cap Screws. Use cap screws
supplied and tighten evenly to 8 ft-lbs (10.85 Nm) torque.

6 | Baker Hughes Copyright 2021 Baker Hughes Company. All rights reserved.
5. Install Spring and Spring Follower. Lubricate Spring Follower
with a Petroleum Oil Grease such as Lubriplate No. 105®.
6. To avoid galling of adjusting screw, apply a small amount of
lubricant (such as NEVER SEEZ® by Bostik) to the adjusting
screw thread.
Lubricate with
Petroleum Oil
Grease such as
LUBRIPLATE No. 105®
Figure 11
Installing the Spring with lubricated Spring Follower.
6A. Regulators with the red, plated, blue, and purple springs:
Install Closing Cap with Adjusting Screw and Sealing Nut
and O-Ring.
Figure 12
Installing the closing cap assembly for Regulator with the
Red, Plated, Blue, and Purple Springs.
6B. Regulators with black and green spring: Install Closing Cap
with Adjusting Screw, Spacer, Sealing Nut, and O-Ring. The
spacer prevents the Black and Green springs from being
over compressed.
Spacer
Figure 13
Installing the closing cap assembly with spacer (to prevent
spring over compression) for Regulators with the Black
and Green Springs.
Body Insert (Cartridge) Assembly - All Regulators Pressure
Reducing (PRV) Mode
Figure 14
7A. Refer to Figure 14 & 15. Stack the following parts on the
Bottom Cap in the order shown in the drawing:
Return Spring
Stem Guide
Orifice Spring
Plug and Stem
Orifice
Orifice O-Ring
Back-up Washer

Mooney Series 21 Regulator Instruction Manual | 7
Copyright 2021 Baker Hughes Company. All rights reserved.
Regulator Assembly - Series 21 & 21S (cont’d)
No Spacer
Figure 15
Stack the Return Spring, Stem Guide, Orifice Spring, Plug
and Stem, Orifice, Orifice O-Ring, and Back-up Washer on
the Bottom Cap.
8. Lubricate both Body Insert O-Rings with Parker O-Lube1 (or
equivalent Petroleum based Lubricant) and install on Body
Insert (Cartridge).
9. Body Insert Assembly: Lift Bottom Cap complete with valve
mechanism assembly and insert into Body Insert. The
Orifice Spring should snap the Orifice into place as the
Bottom Cap is screwed into place. Check the assembly by
pushing the Stem against a hard surface to make sure it
moves freely and returns to the extended position.
Measure the stem extension. (See Figure 14)
Pressure Reducing mode: 0.32 inches (8.12 mm)
Figure 16
Insert the assembly into the Body Insert - the orifice should
“snap” into place.
10. Lubricate Stem O-Ring with Parker Super-O-Lube® (or
equivalent Silicon Lubricant) and slip over Stem.
11. Insert Body Insert into Regulator Body and screw into place
snugly.
Stem O-Ring
Figure 17
Insert Body Insert (Cartridge) with lubricated Stem O-Ring
into the Regulator Body.
Note: Over tightening an O-Ring Joint will not improve the
seal. Screw in until metal parts make contact and snug
slightly.
12. Regulator Assembly is now complete.
Regulator Assembly - Series 21H & 21HS
Note: The high pressure constructions (Series 21H & 21HS)
differs from the Series 21 & 21S with the addition of a
diaphragm spacer assembly that limits the effective area of
the diaphragm and doubles the spring range of the black
and green springs.
1. Diaphragm Assembly: Install the Regulator Diaphragm
with convex side toward Diaphragm Plate and Main Spring
(Refer to Figure 18). Tighten nut on the Diaphragm Retainer
to approximately 5 to 6 ft-lbs (6.78 - 8.14 n-m) torque.
Figure 18
Insert Body Insert (Cartridge) with lubricated Stem O-Ring
into the Regulator Body.
Note: Over tightening will distort the Regulator Diaphragm.

8 | Baker Hughes Copyright 2021 Baker Hughes Company. All rights reserved.
Regulator Assembly - Series 21H & 21HS (cont’d)
2. Place Diaphragm Assembly in the regulator body with the
diaphragm touching the grooved sealing surface of the
regulator body and the O-Ring facing up. (Refer to Figure
18 & Figure 19).
O-Ring
Figure 19
Placing high pressure Diaphragm Assembly
on Regulator Body.
3. Place Spring Housing on Regulator Body with vent
connection in desired position.
4. Install Spring Housing Cap Screws. Use Cap Screws
supplied and tighten evenly to 8 ft-lbs torque.
5. Install Spring and Spring Follower. NOTE: The Mooney
Series 21H & 21HS use only the Black and Green Springs.
6. Follow assembly directions for Series 21 & 21S
Regulator for steps 6B through 10.

Mooney Series 21 Regulator Instruction Manual | 9
Copyright 2021 Baker Hughes Company. All rights reserved.
Notes

Tech Field Support & Warranty:
Phone: [phone]
[e-mail]
bakerhughes.com
Copyright 2021 Baker Hughes Company. All rights reserved. Baker Hughes provides this information on an
“as is” basis for general information purposes. Baker Hughes does not make any representation as to the
accuracy or completeness of the information and makes no warranties of any kind, specic, implied or oral,
to the fullest extent permissible by law, including those of merchantability and tness for a particular purpose
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 and
Mooney 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.
BHMY-21-IOM-32613A-0321 03/2021
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