HIGH PERFORMANCE, TWO-STAGE DESIGN
PROVIDING FLOW CONTROL IN A SIMPLE,
DEPENDABLE, LONG-LIFE DESIGN
WHAT MOVES YOUR WORLD
Rev. R, August 2013
SERVO VALVES
PILOT OPERATED
FLOW CONTROL VALVE
WITH ANALOG INTERFACE
72 SERIES
ISO 10372-06-05-0-92
Moog 72 Series Flow Control Servo Valves
INTRODUCTION
2
Whenever the highest levels of motion control
performance and design flexibility are required, you’ll find
Moog expertise at work. Through collaboration, creativity
and world-class technological solutions, we help you
overcome your toughest engineering obstacles. Enhance
your machine’s performance. And help take your thinking
further than you ever thought possible.
INTRODUCTION
Product Overview 3
Features and Benefits 4
Description of Operation 5
TECHNICAL DATA
General, Hydraulic, Static and Dynamic 6
Response Curves 7
Electrical Data 8
Installation Drawings and
Null Adjust Instructions 9
Hole Pattern for Mounting Surface 10
BACKGROUND
Null Flow Adjustment 11
Flow Calculation and Null Cut Options 12
Related Products 13
Routine Maintenance Guidelines 14
About Moog 15
ORDERING INFORMATION
Accessories and Spare Parts 17
Ordering Code 18
This catalog is for users with technical knowledge. To ensure all necessary characteristics for function and safety of the system, the user has
to check the suitability of the products described herein. The products described herein are subject to change without notice. In case of doubt,
please contact Moog.
Moog is a registered trademark of Moog Inc. and its subsidiaries. All trademarks as indicated herein are the property of Moog Inc. and its
subsidiaries. For the full disclaimer refer to www.moog.com/literature/disclaimers.
For the most current information, visit www.moog.com/industrial or contact your local Moog office.
Rev. R, August, 2013
TABLE OF CONTENTS
PRODUCT OVERVIEW
The 72 Series flow control servo valves are throttle valves
for 3 and preferably 4-way applications. They are a high
performance, 2-stage design that covers the range of rated
flows from 95 to 225 l/min (25 to 60 gpm) at 35 bar
(500 psi) valve pressure drop per spool land.
The output stage is a closed center, four-way sliding
spool. The pilot stage is a symmetrical double-nozzle
and flapper, driven by a double air gap, dry torque motor.
Mechanical feedback of spool position is pro vid ed by a
cantilever spring. The valve design is simple and rugged for
de pendable, long life op era tion.
These valves are suitable for electrohydraulic position,
speed, pressure or force control systems with high dynamic
response requirements.
The 72 Series is ideally suited for applications in the 95
to 225 l/min (25 to 60 gpm) when superior dynamics are a
must.
Intrinsically safe valve versions are available for use in
applications with potentially hazardous environments.
Specific models are certified to FM, ATEX, CSA, TIIS and
IECEx standards.
Moog 72 Series Flow Control Servo Valves
INTRODUCTION
TIIS
Intrinsically safe valve versions are available for use in potentially hazardous environments. Specific models are certified to
FM, ATEX, CSA TIIS and IECEx standards. Contact Moog for details.
Valve design 2-stage, with spool and bushing and dry torque motor
Mounting surface ISO 10372-06-05-0-92
Rated flow at µp
N
35 bar/spool land 95 l/min 150 l/min 225 l/min
(500 psi/spool land) (25 gpm) (40 gpm) (60 gpm)
Maximum operating pressure to ports P, T, A, B, X 210 bar (3,000 psi)
Pilot Design Nozzle Flapper
Step response time for 0 to 100% stroke 11 ms 18 ms 33 ms
3Rev. R, August, 2013
Features Benefits
2-stage design Enables high machine performance, faster cycle times
and greater accuracy - all resulting in higher productivity
100% factory tested to ensure critical specification Ensures smooth and easy startup, reduces downtime and
performance insures long life in critical industrial applications
Dual Coil torque motor Redundancy for high reliability
Dual Precision Nozzles in Torque Motor Precision flow control and predictability
Dry torque motor design Eliminates potential contamination issues in the air gaps
of the torque motor that could cause machine downtime
Hardened 440C Bushing and Spool Provides for long life, wear resistance when used in the
harsh environments; provides for low sliding friction
during use
Emergency failsafe positioning Most valves are set up to return to a failsafe position
when the command signal is interrupted or eliminated
Field replaceable pilot stage filter Enables preventive maintenance in the field, saving
precious machine downtime and service costs
External null bias adjustment Enables technicians to manually adjust the null bias of the
valve to adapt to the conditions of the machine (see
section on null flow adjustment – Page 12). This feature
provides a simple adjustment to machine performance
without the need to adjust a controller.
FEATURES AND BENEFITS
The 72 Series is part of Moog’s family of Mechanical
Feedback Servo Valves. This is proven technology that
performs reliably in machines where high performance,
stability and accuracy are required. Moog’s Mechanical
Feedback Valves are designed to provide high reliability
and long service life.
Moog 72 Series Flow Control Servo Valves
INTRODUCTION
4Rev. R, August, 2013
DESCRIPTION OF OPERATION
The 72 Series Flow Control Servo Valve consists of a
polarized electrical torque motor and two stages of
hydraulic power amplification. The motor armature
extends into the air gaps of the magnetic flux circuit and
is supported in this position by a flexure tube. The flexure
tube acts as a seal between the electromagnetic and
hydraulic sections of the valve. The 2 motor coils surround
the armature, one on each side of the flexure tube.
The flapper of the first stage hydraulic amplifier is rigidly
attached to the midpoint of the armature. The flapper
extends through the flexure tube and passes between 2
nozzles, creating two variable orifices between the nozzle
tips and the flapper. The pressure controlled by the flapper
and nozzle variable orifice is fed to the end areas of the
second stage spool.
The second stage is a conventional four-way spool design in
which output flow from the valve, at a fixed valve pressure
drop, is proportional to spool displacement from the null
position. A cantilevered feedback spring is fixed to the
flapper and engages a slot at the center of the spool.
Displacement of the spool defects the feedback sprint
which creates a force on the armature/flapper assembly.
Input signals induce a magnetic charge in the armature
and cause a deflection of the armature and flapper. This
assembly pivots about the flexure tube and increases the
size of one nozzle orifice and decreases the size of the
other.
The differential pressure created by this action causes
spool motion. The resulting spool displacement induces a
linear force in the feedback wire which opposes the original
input signal torque. Spool movement continues until the
feedback wire force equals the input signal force.
Moog 72 Series Flow Control Servo Valves
INTRODUCTION
5Rev. R, August, 2013
P
B
T
A
Spool
Inlet
Orifice
Coil
Bushing
Connector
Feedback Wire
Magnet (not shown)
Upper Polepiece
Flexure Tube
Armature
Lower Polepiece
Flapper
Nozzles
Electro-hydraulic Servo Valve Cut-away
Rated flow tolerance ± 10%
Step response time for 0 to 100% stroke 95 l/min (20 gpm) = 11ms
150 l/min (40 gpm) = 18 ms
225 l/min (60 gpm) = 33 ms
Threshold <1.5%
Hysteresis <4.0%
Null shift for ∆T = 38 °C (100 °F) <2.0%
72 SERIES SERVO VALVES
Moog 72 Series Flow Control Servo Valves
TECHNICAL DATA
6Rev. R, August, 2013
General Technical Data
Valve design 2-stage, with spool and bushing and dry torque motor
Pilot stage Nozzle Flapper Standard Dynamics
Mounting pattern ISO 10372-06-05-0-92
Installation position Any orientation, fixed or movable
Weight 3.52 kg (7.75 lb)
Storage temperature range -40 to +60 °C (-40 to +140 °F)
Ambient temperature range -40 to +135 °C (-40 to +275 °F)
Vibration resistance 30 g, 3 axis, 10 Hz to 2 kHz
Shock resistance 30 g, 3 axis
Seal material Fluorocarbon (FKM) 85 SHORE
Others upon request
Hydraulic Data
Maximum operating pressure to ports P, T, A, B 210 bar (3,000 psi) - - - 350 bar (4,500 psi) special
Rated flow at p
N
35 bar/spool land (500 psi/spool land) 95 l/min (25 gpm) 150 l/min (40 gpm) 225 l/min (60 gpm)
Null adjust authority Greater than 10% of rated flow
Hydraulic fluid Hydraulic oil per DIN 51524 parts 1 to 3 and ISO 11158.
Other fluids on request.
Temperature range -40 to +60 °C (-40 to +140 °F)
Recommended viscosity range 10 to 85 mm
2
/s (cSt)
Maximum permissible viscosity range 5 to 1,250 mm
2
/s (cSt)
Recommended filter rating
For functional safety ß
10
75 (10 µm absolute)
For longer life ß
5
75 (5 µm absolute)
Static and Dynamic Data (at 3,000 psi)
72 SERIES SERVO VALVES
Moog 72 Series Flow Control Servo Valves
TECHNICAL DATA
7Rev. R, August, 2013
0
20
40
60
80
100
1
2
20
30
10
40
Stroke (% of Rated Signal)
Time (ms)
0
1
2
20
30
10
40
20
40
60
80
100
Time (ms)
Stroke (% of Rated Signal)
1
2
0
20
30
10
40
Time (ms)
20
40
60
80
100
Stroke (% of Rated Signal)
96 l/min (25 gpm)
Plot 1 @ 210 bar (3,000 psi)
Plot 2 @ 70 bar (1,000 psi)
154 l/min (40 gpm)
Plot 1 @ 210 bar (3,000 psi)
Plot 2 @ 70 bar (1,000 psi)
231 l/min (60 gpm)
Plot 1 @ 210 bar (3,000 psi)
Plot 2 @ 70 bar (1,000 psi)
-2
+2
-4
-8
-10
-6
0
80
60
100
20
40
7
20 50 20010010 3015
Amplitude Ratio (Decibels)
1
2
4
3
Frequency (Hz)
Phase Lag (Degrees)
96 l/min (25 gpm)
Plot 1 & 3 = ±40% rated signal (solid)
Plot 2 & 4 = ±100% rated signal (dash)
7
20 50 20010010 3015
80
60
100
20
40
-2
+2
-4
-8
-10
-6
0
1
2
4
3
Frequency (Hz)
Phase Lag (Degrees)
Amplitude Ratio (Decibels)
7
20 50 20010010 3015
-2
+2
-4
-8
-10
-6
0
80
60
100
20
40
1
2
4
3
Frequency (Hz)
Amplitude Ratio (Decibels)
Phase Lag (Degrees)
154 l/min (40 gpm)
Plot 1 & 3 = ±40% rated signal (solid)
Plot 2 & 4 = ±100% rated signal (dash)
231 l/min (60 gpm)
Plot 1 & 3 = ±40% rated signal (solid)
Plot 2 & 4 = ±100% rated signal (dash)
ELECTRICAL DATA
Moog 72 Series Flow Control Servo Valves
TECHNICAL DATA
8
Rev. R, August, 2013
Rated current and coil resistance
A variety of coils are available for 72 Series Servo Valves,
which offer a wide choice of rated currents.
Coil impedance
The resistance and inductance of standard coils are
given below. The 2 coils in each Servo Valve are wound
with equal turns giving a normal production tolerance
on coil resistance of ±10 %. Copper magnet wire is
used, so the coil resistance will vary significantly with
temperature. The effects of coil resistance changes can be
essentially eliminated through use of a current feedback
servoamplifier having high output impedance.
Inductance is determined under pressurized
operating conditions and is greatly influenced by back
electromagnetic forces of the torque motor. These effects
vary with most operating conditions, and vary greatly
with signal frequencies above 100Hz. The apparent coil
inductance values given are determined at 50 Hz.
Ordering code Recommended rated current [mA] Coil resistance Power consumption [W]
Command signal [Ohms/coil at
25°C (77°F)]
Single coil Series coils Parallel coils Single coil Series coils Parallel coils
4 ±8 ±4 ±8 1,000 0.064 0.032 0.032
H ±15 ±7.5 ±15 206 0.045 0.023 0.023
L ±40 ±20 ±40 80 0.128 0.064 0.064
Ordering code Coil Inductance [H]
Measured at 50 Hz
Single coil Series coils Parallel coils
4 3.2 9.7 2.6
H 0.72 2.2 0.59
L 0.22 0.66 0.18
Coil connections
A 4-pin electrical connector that mates with an
MS3106F14S-2S is standard. All 4 torque motor leads
are available at the connector so external connections can
be made for series, parallel, or differential operation. 72
Series Servo Valves can be supplied on special order with
other connectors or pigtails.
Configuration for valve opening P B, A T
A B C
DA
B C D
A B C D
Single Series Parallel
A (+), D (-), B and C connectedA (+), B (-) or C (+), D (-)
A and C (+), B and D (-)
INSTALLATION DRAWINGS AND NULL ADJUST INSTRUCTIONS
4
2
PIN D
PIN C
3
PIN B
5
PIN A
7
6
36.50
(1.437)
83
(3.27)
170
(6.70)
131
(5.17)
57
(2.24)
50
(1.97)
70
(2.75)
73.02
(2.875)
(1.845)
46.86
93.7
(3.69)
118
(4.65)
85.72
(3.375)
102
(4.02)
128
(5.04)
42.88
(1.688)
7.11 (.280)
35
(1.38)
98.8
(3.89)
Ø
6.35 (.250)
A B C D
Typical Wiring Schematic
70
(2.75)
1
Moog 72 Series Flow Control Servo Valves
TECHNICAL DATA
9
Rev. R, August, 2013
Fluid:
Industrial hydraulic fluid per DIN 51524 parts 1 to
3 and ISO 11158, maintained to ISO 4406 Code
17/14/11 recommended.
Viscosity 10 to 85 mm
2
/s (cSt) at 38 °C
(60 to 300 SUS at 100 °F).
Operating Temperature Range:
Fluid: -40 to +60 °C (-40 to +140 °F)
Ambient: -40 to +135 °C (-40 to +275 °F).
Valve Phasing:
Flow out port B results when:
Series coils: B & C connected, A+, D-
Parallel coils: A & C connected, B & D connected,
A and C+, B and D-
Single coils: A+/B- or C+/D-.
Null Adjust:
Flow out port B results with the clockwise rotation of
the null adjust screw.
Surface:
Surface to which valve is mounted requires flatness of
0.05 mm (0.002 in) over 100 mm (3.94 in) and an average
finish R
a
better the 0.8 µm (0.000032 in)
Ports:
14.23 mm (0.562 in) Ø counter-bored 17.65 mm (0.695
in) inside Ø by 22.23 mm (0.875 in) outside Ø
Recommended Seals:
90 durometer that is compatible with the hydraulic fluid.
P, T, A, and B: Size SAE AS568-019
20.35 mm (0.801 in) inside diameter by
1.78 mm (0.070 in) cross section o-ring
X: Size SAE AS568-012
9.25 mm (0.364 in) inside diameter by
1.78 mm (0.070 in) cross section o-ring
1 Typical wiring schematic
2 Location pin (refer to section Hole Pattern for position)
3 Filter
4 4X Ø 10.31 mm (0.406 in) thru
5 Mechanical Null Adjust screw (requires 3/8” wrench and 3/32” hex key)
6 Optional Magnetic Null Adjust
7 Connector mates with MS3106-14S-2S
72 SERIES HOLE PATTERN FOR MOUNTING SURFACE
F3
T
P
B
X
Y
F4
F1 F2
G
X
Y
A
Notes
1. Surface: ISO 10372-06-05-0-92
Surface to which the valve is mounted requires flatness
of 0.05 mm (0.002 in) over 100 mm (3.94 in) and an
average finish R
a
better than 0.8 µm (0.000032 in).
2. Ports:
For maximum flow the ports P, T, A, and B must be
designed with diameters of 18 mm (0.688 in).
14.23 mm (0.562 in) Ø counter-bored 17.65 mm
(0.695 in) inside Ø by 22.23 mm (0.875 in) outside Ø
Designation P A B T X Y G F1 F2 F3 F4
Size Ø mm 17.48 17.48 17.48 17.48 6.35 3.18 7.92 M10 M10 M10 M10
in 0.688 0.688 0.688 0.688 0.250 0.125 0.312 3/8-16 3/8-16 3/8-16 3/8-16
Position X mm 36.53 11.13 61.93 36.53 55.58 49.99 11.13 0 73.03 73.03 0
in 1.438 0.438 2.438 1.438 2.188 1.968 0.438 0 2.875 2.875 0
Position Y mm 17.48 42.88 42.88 68.28 4.78 81.79 28.83 0 0 85.73 85.73
in 0.688 1.688 1.688 2.688 0.188 3.220 0.938 0 0 3.375 3.375
Moog 72 Series Flow Control Servo Valves
TECHNICAL DATA
10Rev. R, August, 2013
3. Recommended Seals:
90 durometer that is compatible with the hydraulic fluid.
P, T, A, and B: Size SAE AS568-019
20.35 mm (0.801 in) inside diameter by
1.78 mm (0.070 in) cross section o-ring
X: Size SAE AS568-012
9.25 mm (0.364 in) inside diameter by
1.78 mm (0.070 in) cross section o-ring
NULL FLOW ADJUSTMENT
The X Port is provided to allow an external pilot supply
to be connected. This feature is usually configured at the
factory. However, it can be configured in the field with
special instructions and considerations. The external pilot
configuration provides for a higher pressure to enable a
faster pilot response. Each valve model is developed with a
predetermined pilot configuration. If you choose to modify
that configuration in the field we offer the following:
1. Remove the set screw from the “X” port on the base of
the valve using a 1/8’’ Allen wrench.
2. Thread a #2-56 screw into the o-ring plug that is now
visible and remove it from the “X” port.
3. Remove the four (4) socket head cap screws and
lockwashers that retain the cover plate for the field
replaceable filter, using a 3/16’’ Allen wrench.
4. Use one of the screws to pull the filter and filter housing
out of the filter cavity of the body. The filter housing has
two (2) o-rings on its O.D. The housing will come part way
out, then stop after the second o-ring passes the internal
relief in the body. At this time it may be easier to remove
the visible o-ring and carefully pry the housing and filter out
External
Internal
X PortPressure Port
It is often desirable to adjust the null flow of a servo valve
independently of other system parameters. We provide two
means to accomplish this; using a mechanical adjustment
on the side of the valve body or an (optional) magnetic
adjustment on the top of the torque motor cover. Valves
with mechanical null adjustment allow for at least ±10%
adjustment of null flow. The mechanical null adjustment
is an eccentric bushing retainer pin, located above the
tank port designation on the valve body, which if rotated
provides control of the bushing location. Mechanical
feedback elements position the spool relative to the valve
body for a given input signal. Therefore, a movement of the
bushing relative to the body changes the null flow.
Mechanical Adjustment Procedure
With zero current (electrical connector disconnected).
Using a 3/8 inch offset wrench, loosen the self-locking
fitting until the null adjustor pin can be rotated. (This
should usually be less than 1/2 turn). DO NOT remove the
self-locking fitting. Insert a 3/32 inch Allen wrench in the
null adjustor pin. Use the 3/32 Allen wrench to rotate the
mechanical adjustor pin to obtain the desired null flow.
Re-torque the self-locking fitting to 57 in lbs.
Magnetic Adjustment Procedure
With zero current (electrical connector disconnected).
Using a blade screwdriver or coin, rotate the magnetic
adjustor on top of the motor cap clockwise. If the flow is
to the B-port and acceptable, the adjustor should not be
rotated more than ±50 degrees. If the flow is to the B-port
and unacceptable, rotate the adjustor 180 degrees from the
zero null bias which will result in null flow to the A-port with
a clockwise rotation. Again, no more than ±50 degrees.
The magnetic null adjustment allows at least ±10%
adjustment to the null flow. The magnetic null adjustor
is located on top of the motor cap which if rotated
magnetically biases the first state torque motor.
with two opposing flat blade screwdrivers, than to continue
pulling on the screw. Be careful not to damage the o-ring
groove.
5. A bore will be visible inside the body cavity where the
o-ring plug must be inserted.
6. Retain the o-ring plug with the set screw.
7. Re-install the filter and filter housing in the cavity.
8. Re-install the filter cover, retaining screws and
lockwashers. Torque the screws to 80-90 in-lbs.
Note: If at any time you are uncertain about how to affect
the reconfiguration please return it the factory and we will
be happy to do it for you.
Moog 72 Series Flow Control Servo Valves
BACKGROUND
11Rev. R, August, 2013
X PORT CONFIGURATION
FLOW CALCULATION
The actual flow is dependent upon the electrical command
signal and valve pressure drop. The flow for a given valve
pressure drop can be approximated using the square root
function for sharp edge orifices.
Q = Q
N
Q actual flow
Q
N
rated flow
∆p actual pressure drop per spool land
∆p rated pressure drop per spool land
Standard Axis Cut Open Center Spool Valves Closed Center Spool Valves
Input Current
Control Flow
Q
I
Overlap
Zone
Input Current
Control Flow
Q
I
Control Flow
Input Current
Q
I
Underlap
Zone
1
•
•
•
38 (10)
380 (100)
70
(1,000)
7
(100)
700
(10,000)
225 (60)
150 (40)
95 (25)
∆p [bar (psi)]
Q [l/min (gpm)]
Flow Diagram
SPOOL NULL CUT OPTIONS
Default, without request for
optional cuts
Normally used in hydraulic motor
applications
Normally used in failsafe
applications
∆ p
∆ p
N
Moog 72 Series Flow Control Servo Valves
BACKGROUND
12Rev. R, August, 2013
RELATED PRODUCTS
Moog 72 Series Flow Control Servo Valves
BACKGROUND
13Rev. R, August, 2013
Din Rail Modules - Analog Control Cards
Moog’s DIN rail mounted module analog control cards
are ideal for use in enclosures where space is limited.
Modules include servoamplifers, transducer conditioning
electronics, command and auxiliary function modules,
valve drive amplifiers, and power supplies. All of these
modules are CE marked and require a 24V DC supply. The
modules mount to standard 35mm DIN rail mount for easy
installation and removal.
PortableValve Testers - Evaluates Valves in the Field
Valve testers are a cost effective method for evaluating
valves in the field. They provide a quick and easy means of
differentiating between hydraulic and electronic problems.
There are five models to choose from, each with different
levels of capability and flexibility to meet your specific
requirements. All valve testers have a compact, easily
portable design.
Mounting Manifolds - Easier Installation and Maintenance
Various mounting manifolds are available for standard
industrial valves, including base and adapter types for
mounting and flushing requirements. Other hardware such
as bolts and connectors are also available.
The specific accessories you may need for a particular
model are listed in the relevant product catalogs and can
be ordered through your local office.
The most effective way to reduce life cycle costs of an
oil hydraulic system, regardless of the types of valve
used, is through close attention to contamination control.
For industrial servo systems the ideal system filter
arrangement is summarized as follows:
• Use a 10 micron (Beta 10 >= 75) high pressure filter
without by-pass just before the valve or critical parts
of the valve (e.g. pilot)
• Use a 3 micron (Beta 3 >= 75) low pressure filter in the
return or bypass line.
• Use a filter in the tank breather that is at least the
same filtration level as the finest filter in the system.
This recommendation is based on the fact that most servo
and proportional valves can accept the odd particle up to
25 microns so the pressure filter will protect the valve
from catastrophic failure. The real work is done by the low
pressure filter reducing the small particle contamination
which is the prime contributor to component wear and
silting.
Assuming that the filters are properly dimensioned and
care is taken during initial installation and maintenance,
the aim should be to limit oil contamination to 16/13
(under the old ISO 4406) or 19/16/13 (under the new
ISO 4406).
For long life, the maximum levels per the old and new ISO
are 15/12 and 18/15/12, respectively. It is important to
note that these are maximum contamination levels and
with proper care and regular filter change, significantly
lower levels can and should be achieved. Attention must
also be paid to a number of other factors that contribute
to oil condition problems such as elevated temperatures,
high tank humidity, “dirty” new oil, etc.
Filtration - Oil Filtration Requirements for
Industrial Servo Systems
Din Rail Module
Valve Tester
Mounting Manifolds
Hydraulic Filters
ROUTINE MAINTENANCE GUIDELINES
Moog 72 Series Flow Control Servo Valves
BACKGROUND
14Rev. R, August, 2013
Every six months or 4,000 operating hours, check for
proper operation of the control valve assembly by
performing the preventative maintenance steps outlined
below. These checks do not require removal of the valve
from the process line. If a problem is suspected, repair the
valve assembly prior to returning the unit to service.
• Replace the hydraulic filter element
• Stroke the valve and check for smooth, full-stroke
operation; unsteady motion could indicate a servo
valve, actuator or process valve problem
GENERAL INFORMATION
Effects when Storing Valves
The following effects may occur when storing valves for
a long time:
• Sealing materials become brittle, possibly resulting
in leaks
• Hydraulic fluid becomes gummy, possibly resulting in
friction
• Electrolytic capacitors of the valve electronics may
fatigue, possibly resulting in adverse effects on the
valve electronics
Storage Time
The storage time starts at stock receipt and ends at
mounting of the valve.
Preservatives
If conservation is carried out, use only conservatives
which are compatible with the sealing materials and do
not affect the valve, spare parts and accessories.
BEFORE STORAGE
Note: If the valves are exposed to aggressive
environmental influences during storage, vacuum
packaging may be necessary. We recommend the
following preparatory measures for storage:
Mount the shipping plate on the valve.
This is the only way of adequately protecting the valves
against the ingress of dirt and moisture and protecting
the seals against the effects of ozone and UV.
Put the valve, spare parts and accessories into the
original packaging.
Package each valve separately.
Enclose anti-tarnish paper or package the valve, spare
parts and accessories with corrosion inhibiting film.
(Only for storage time > 1 year.)
Multipacks of single valves in their individual packages
are allowed.
Seal the original packaging properly.
This is the only way of adequately protecting the valves,
spare parts and accessories against damage.
STORAGE CONDITIONS
We recommend the following ambient conditions for
storage:
• Dust-free, moderately ventilated
• As vibration-free and shock-free as possible
Shock resistance (as per EN 60068-2-27):
50 g, 6 directions, half-sine 3 ms
Vibration resistance (as per EN 60068-2-6):
30 g, 3 axes, frequency 10 to 2,000 Hz
Temperature
Recommended: +15 to +25 °C (+59 to +77 °F
Permissible: -40 to +80 °C (-40 to +176 °F
Temperature fluctuations >10 °C (50 °F) must be
avoided.
Distance to shielded radiators: > 1 m (3 ft)
No direct exposure to sunlight
No sources of light with a high UV content
UV rays generate ozone, which damage sealing
materials.
Relative air humidity: < 65 %, non condensing
AFTER STORAGE
We recommend to check the original packaging, valve,
spare parts and accessories for possible damage or
alterations due to storage, that is, before use.
Damaged or not functional valves, spare parts and
accessories must not be started up.
Sealing materials with the following characteristics
must not be used:
• Contamination
• Cracking
• Hardening/softening
• Stickiness
• Discoloration
Storage Time > 5 Years
We recommend that the valve be checked by us or one
of our authorized service centers after a storage time
of more than 5 years.
Storage Time > 10 Years
After a storage time of more than 10 years the valves
have to be checked by us or one of our authorized
service centers.
Moog 72 Series Flow Control Servo Valves
BACKGROUND
15Rev. R, August, 2013
ABOUT MOOG
Moog Inc. is a worldwide designer, manufacturer and
integrator of precision control components and systems.
Moog’s Industrial Group designs and manufactures
high performance motion control solutions combining
electric, hydraulic, and hybrid technologies with expert
consultative support in a range of applications including
energy production and generation machinery, industrial
production machinery and simulation and test equipment.
We help performance-driven companies design and
develop their next-generation machines.
Moog maintains facilities in 26 countries around the globe.
This vast scope ensures that our engineers remain close
to the needs of machine builders and provide flexible
design solutions and technical expertise tailored to our
customers’ toughest challenges.
Moog experts work in close collaboration with machine
builders and application engineers to design motion
control systems for greater productivity, higher reliability,
superior connectivity, less costly maintenance and more
effective operations. Our regional presence, industry
knowledge and design flexibility ensures Moog motion
control solutions are tailored to their environment—
from meeting operating regulations and performance
standards, to taking machine performance to a higher
level.
Products
At the heart of every Moog solution is an array of products
engineered for precision, high performance and reliability.
For more than six decades, Moog products have been
specified for critical machine applications.
Some are developed specifically for unique operating
environments. Others are standard equipment on
machines across many industries. All are continuously
improved to take advantage of the latest technology
breakthroughs and advancements.
Moog products include:
• Servo Valves and Proportional Valves
• Servo Motors and Servo Drives
• Servo Controllers and Software
• Radial Piston Pumps
• Actuators
• Integrated Hydraulic Manifold Systems and Cartridge
Valves
• Slip Rings
• Motion Bases
Servo Valves
Radial Piston Pumps
Servo Drives
Active Cartridge Valves
Moog 72 Series Flow Control Servo Valves
BACKGROUND
16Rev. R, August, 2013
ABOUT MOOG
Hydraulic solutions
Since Bill Moog invented the first commercially viable
servo valve in 1951, Moog has set the standard
for world-class hydraulic technology. Today, Moog
products are used in a variety of applications -
providing high power, enhanced productivity and ever
better performance for some of the world’s most
demanding applications.
Electric solutions
Clean operation, low noise generation, less
maintenance and reduced power consumption
make Moog electric solutions ideal for applications
worldwide. Moog is the ideal partner for applications
where transitioning technologies requires special
expertise.
Hybrid solutions
By incorporating the advantages of existing hydraulic
and electric technologies - including modular
flexibility, increased efficiency and cleanliness -
into innovative hybrid solutions, Moog offers new
performance potential in specialized applications.
Moog Global Support
Moog Global Support is our promise to offer world-class
Repair and Maintenance Services delivered expertly by our
trained technicians. With the reliability only available from
a leading manufacturer with facilities around the world,
Moog offers you service and expertise you can count on to
keep your equipment operating as it should.
This promise offers many benefits to our customers
including:
• Reduce your downtime by keeping critical machines
running in peak performance
• Protect your investment by ensuring reliability,
versatility and long-life of products
• Better plan your maintenance activities and make
systematic upgrades
• Leverage our flexible programs to meet the unique
service requirements of your facility
Look to Moog for global support including:
• Repair services using OEM parts are performed by
trained technicians to the latest specifications
• Stock management of spare parts and products to
prevent unplanned downtime
• Flexible programs, tailored to your needs such as
upgrades, preventative maintenance and annual/multi-
year contracts
• On-site services bring the expertise to you, providing
quicker commissioning, set-up and diagnostics
• Access to reliable services that are guaranteed to offer
consistent quality anywhere in the world
For more information on Moog Global Support visit
www.moog.com/industrial/service.
Flight Simulation
Formula One Simulation Table
ACCESSORIES AND SPARE PARTS
Series Dependent Accessories and Spare Parts
Accessories 72 Series
Part designation Description Part number
Attachment screws 4 required M10x50 long ISO 4762-10.9 tightening B64929-009B050
Metric Torque 36 Nm
Attachment screws 3/8 - 16 UNC by 2.0 long tightening torque 318 lbf-in C66391-332B
Inch
Mating connector 4 pin electrical connector -49054F014S002S (MS3106F14S-2S)
Mounting manifold Base mounting manifold, four port -22236AM003
Flushing plate Manifold employed in place of valve when initially cleaning hydraulic fluids G4321AM001
AMO manifold Adjustable metering orifice manifold used to bleed fluid between A and B A96920AM015
ports for better pressure control
CRV manifold Cross port relief manifold used to limit pressure levels in ports A and B -65711AM004-XXXX
Safety manifold Sandwich manifold used to lock, extend and retract cylinder upon loss B64467AM
of electrical signal or hydraulic pressure
Part designation Description Material Part number
Base O-ring for P, T, A 4 required for P, T, A, and B ports 20.4 mm Fluorocarbon FKM 85 shore -42082-040
and B ports (0.801 in) inside diameter x 1.8 mm (0.070 in)
cross section. Equivalent MIL-R-83248
size -019
X port O-ring 1 required for the X port 9.25 (0.364 in) x -42082-013
1.8 mm (0.070 in) cross section. Equivalent
MIL-R-83248 size -012
Replaceable filter, 44 µm nominal -23020
Pilot stage tube
Replaceable filter 20 µm nominal -22050
Field replaceable
Filter replacement kit Contains the following: Fluorocarbon FKM 85 shore B52555RK099K001
2 pieces O-ring 26.7 mm (1.051 in) inside diameter
x 1.8 mm (0.070 in) cross section
1 piece O-ring 9.2 mm (0.364 in) inside diameter
x 1.8 mm (0.070 in) cross section
2 pieces O-ring 4 mm (0.161 in) inside diameter
x 1.8 mm (0.070 in) cross section
2 pieces O-ring 3.3 mm (0.130 in) inside diameter
x 1.8 mm (0.070 in) cross section
1 piece filter tube 44 µm
1 piece Field replaceable filter 20 µm
1 piece motor cap gasket
Spare Parts 72 Series
Part designation Description Remark Part number
Catalog 72 series general information Note: Visit CDL 6266
www.moog.com/industrial/literature
to download document
Service manual 72 standard series Note: Visit CDS 6211
www.moog.com/industrial/literature
to download document
Service manual 72 intrinsically safe (K) series Note: Visit CDS 6754
www.moog.com/industrial/literature
to download document
Documents (not included in scope of delivery)
Moog 72 Series Flow Control Servo Valves
ORDERING INFORMATION
17
Rev. R, August, 2013
ORDERING CODE
Moog 72 Series Flow Control Servo Valves
ORDERING INFORMATION
18Rev. R, August, 2013
S
09
15
150
O
D
10
4
H
L
Y
8
V
Fluorocarbon (FKM) 85 Shore D
N
Nitrile/Buna N (NBR) 90 Shore D
72
-
-
7
4
6
M
5
9
A
12345678910
95
22
225
F
F
4
3
1
2
210
Others on request
Model designation (assigned at factory)
Factory identification (revised level)
Valve version
Standard response
Rated flow in l/min (gpm)
Maximum operating pressure in bar (psi)
Bushing/spool design
(see Null Cut Options page 15 for designation)
4-way/±10 % overlap/linear
4-way/axis cut/linear
(3,000)
± 4 mA series (± 8 mA parallel)
± 7.5 mA series (± 15 mA parallel)
± 20 mA series (± 40 mA parallel)
Special signal (on request)
Signals for 100 % spool stroke
Seal material
Connector over C1 (A) - side (RH)
Pressure in bar (psi)
17 to 210 (250 to 3,000)
Supply
Internal
Pilot connections and pressure
Standard dynamics
Pilot stage design
Spool position without electrical signal
Mid position
For = 70 bar (1,000 psi) per spool land p
Valve connector
Model number (assigned at the factory) Type designation
(40)
(25)
(60)
N
Optional feature
B
Connector over C2 (B) - side (LH)
X
Special connector
X
Special
Series specification
Intrinsically safe
K
-
K
350
(5,000)
A
4-way/< = 3% overlap/linear
M
4-way/axis cut P
C
> 80% of P
P
/linear (servo drive)
All combinations may not be available.
5
17 to 210 (250 to 3,000) External
Preferred Models
Model Number Type Designation Rated Flow (∆1,000 psi) Rated Current (single coil)
lpm gpm mA
-072-1101 S09F0FM4VBHN 25 ±15
-072-1102 S15F0FM4VBHN 40 ±15
-072-1203 S22F0FM4VBLN 60 ±40
-072-1201-6 S09K0XM4VBLN 25 ±40
-072-1202-6 S15K0FM4VBLN 40 ±40
-072-1203-6 S22K0FM4VBLN 60 ±40
TAKE A CLOSER LOOK
Moog designs a range of motion control products that complement the performance of those featured in this catalog.
Visit our website for more information and contact the moog facility nearest you.
Argentina
+54 11 4326 5916
info.argentina@moog.com
Australia
+61 3 9561 6044
info.australia@moog.com
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+55 11 3572 0400
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+1 716 652 2000
info.canada@moog.com
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+86 21 2893 1600
info.china@moog.com
Finland
+358 9 2517 2730
info.finland@moog.com
France
+33 1 4560 7000
info.france@moog.com
Germany
+49 7031 622 0
info.germany@moog.com
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+852 2 635 3200
info.hongkong@moog.com
India
+91 80 4057 6666
info.india@moog.com
Ireland
+353 21 451 9000
info.ireland@moog.com
Italy
+39 0332 421 111
info.italy@moog.com
Japan
+81 46 355 3767
info.japan@moog.com
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+82 31 764 6711
info.korea@moog.com
Luxembourg
+352 40 46 401
info.luxembourg@moog.com
The Netherlands
+31 252 462 000
test@moog.com
Norway
+47 6494 1948
info.norway@moog.com
Russia
+7 8 31 713 1811
info.russia@moog.com
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+65 677 36238
info.singapore@moog.com
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+27 12 653 6768
info.southafrica@moog.com
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+34 902 133 240
info.spain@moog.com
Sweden
+46 31 680 060
info.sweden@moog.com
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+41 71 394 5010
info.switzerland@moog.com
Turkey
+90 216 663 6020
info.turkey@moog.com
United Kingdom
+44 168 429 6600
info.uk@moog.com
USA
+1 716 652 2000
info.usa@moog.com
www.moog.com/industrial
Moog is a registered trademark of Moog Inc. and its subsidiaries. All
trademarks as indicated herein are the property of Moog Inc. and its
subsidiaries.
©2013 Moog Inc. All rights reserved.
72 Series Flow Control Servo Valves
TJW/PDF, Rev. R, August 2013, Id. CDL6266-en
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