Samson 3271 Service manual

Translation of original instructions
EB 8310-4 EN
Edition November 2022
Types3271 and 3277 Pneumatic Actuators
Actuator area: 355v2cm²
Type 3277 Pneumatic Actuator

Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices. The images shown in
these instructions are for illustration purposes only. The actual product may vary.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
([e-mail]).
Documents relating to the device, such as the mounting and operating
instructions, are available on our website at www.samsongroup.com >
Service & Support > Downloads > Documentation.
Denition of signal words
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip
EB 8310-4 EN

Contents
EB 8310-4 EN
1 Safety instructions and measures ................................................................1-1
1.1 Notes on possible severe personal injury ......................................................1-3
1.2 Notes on possible personal injury ................................................................1-4
1.3 Notes on possible property damage.............................................................1-5
1.4 Warnings on the device...............................................................................1-6
2 Markings on the device ..............................................................................2-1
2.1 Actuator nameplate.....................................................................................2-1
3 Design and principle of operation ...............................................................3-1
3.1 Type3271..................................................................................................3-1
3.2 Type3277..................................................................................................3-2
3.3 Direction of action.......................................................................................3-3
3.4 Signal pressure routing................................................................................3-3
3.4.1 Type3271..................................................................................................3-3
3.4.2 Type3277..................................................................................................3-3
3.5 Fail-safe action ...........................................................................................3-3
3.5.1 Actuator stem extends .................................................................................3-4
3.5.2 Actuator stem retracts..................................................................................3-4
3.6 Versions .....................................................................................................3-4
3.7 Accessories ................................................................................................3-4
3.8 Technical data ............................................................................................3-5
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the actuator ...................................................4-1
4.3 Transporting and lifting the actuator .............................................................4-1
4.3.1 Transporting the actuator.............................................................................4-2
4.3.2 Lifting the actuator ......................................................................................4-2
4.4 Storing the actuator.....................................................................................4-2
5 Installation.................................................................................................5-1
5.1 Preparation for installation...........................................................................5-1
5.2 Mounting the device....................................................................................5-1
5.2.1 Mounting the actuator onto the valve............................................................5-2
5.2.2 Connecting the air supply............................................................................5-6
6 Start-up .....................................................................................................6-1
6.1 Spring compression.....................................................................................6-2
6.1.1 Tensioning the springs .................................................................................6-2
6.1.2 Increasing the actuator thrust .......................................................................6-3
6.1.3 Adapting the travel range............................................................................6-3

Contents
EB 8310-4 EN
6.2 Travel stop..................................................................................................6-4
6.2.1 Bottom travel stop (minimum travel) ..............................................................6-4
6.2.2 Top travel stop (maximum travel) ..................................................................6-4
6.3 Version with handwheel...............................................................................6-5
6.3.1 Extending the actuator stem manually...........................................................6-5
6.3.2 Retracting the actuator stem manually...........................................................6-5
7 Operation..................................................................................................7-1
7.1 Throttling service.........................................................................................7-1
7.2 On/off service............................................................................................7-1
7.3 Manual mode (versions with handwheel only) ...............................................7-2
7.4 Additional notes concerning operation .........................................................7-2
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-2
9 Servicing and conversion............................................................................9-1
9.1 Periodic testing ...........................................................................................9-2
9.2 Preparation for servicing or conversion work.................................................9-2
9.3 Mounting the actuator on the valve after servicing or conversion work ............9-3
9.4 Service work...............................................................................................9-3
9.4.1 Replacing the diaphragm ............................................................................9-3
9.4.2 Replacing the actuator stem seals .................................................................9-5
9.5 Conversion work.........................................................................................9-6
9.5.1 Reversing the direction of action (fail-safe action) ..........................................9-6
9.6 Ordering spare parts and operating supplies ................................................9-9
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Removing the actuator from the valve .........................................................11-2
11.2 Relieving the spring compression in the actuator..........................................11-2
12 Repairs ....................................................................................................12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal...................................................................................................13-1
14 Certicates...............................................................................................14-1
15 Annex......................................................................................................15-1
15.1 Tightening torques, lubricants and tools ......................................................15-1
15.2 Spare parts ..............................................................................................15-1
15.3 After-sales service.....................................................................................15-4
15.4 Information on the UK sales region.............................................................15-4

EB 8310-4 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Type3271 and Type3277 Actuators are designed for operating a mounted
globe valve. In combination with the valve, the actuators are used to shut off the ow of liq-
uids, gases or vapors in the pipeline. Depending on the version, the actuators are suitable
for throttling or on/off service. The actuators can be used in processing and industrial plants.
The actuators are designed to operate under exactly dened conditions (e.g. thrust, travel).
Therefore, operators must ensure that the actuators are only used in operating conditions that
meet the specications used for sizing the actuators at the ordering stage. In case operators
intend to use the actuators in other applications or conditions than specied, contact
SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the de-
vice for its intended purpose or for damage caused by external forces or any other external
factors.
ÎRefer to the technical data and nameplate for limits and elds of application as well as
possible uses.
Reasonably foreseeable misuse
The actuator is not suitable for the following applications:
− Use outside the limits dened during sizing and by the technical data
− Use outside the limits dened by the accessories connected to the actuator
Furthermore, the following activities do not comply with the intended use:
− Use of non-original spare parts
− Performing service and repair work not described
Qualications of operating personnel
The actuator must be mounted, started up, serviced and repaired by fully trained and
qualied personnel only; the accepted industry codes and practices must be observed.
According to these mounting and operating instructions, trained personnel refers to
individuals who are able to judge the work they are assigned to and recognize possible
hazards due to their specialized training, their knowledge and experience as well as their
knowledge of the applicable standards.

1-2 EB 8310-4 EN
Safety instructions and measures
Personal protective equipment
We recommend wearing the following personal protective equipment when handling the
Type3271 and Type3277 Pneumatic Actuators:
− Protective gloves and safety footwear when mounting or removing the actuator
− Eye protection and hearing protection while the actuator is operating.
ÎCheck with the plant operator for details on further protective equipment.
Revisions and other modications
Revisions, conversions or other modications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Fur-
thermore, the product may no longer meet the requirements for its intended use.
Safety devices
The Type3271 and Type3277 Actuators do not have any special safety equipment.
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
prevent hazards that could be caused in the actuator by the signal pressure, stored spring
energy or moving parts by taking appropriate precautions. Plant operators and operating
personnel must observe all hazard statements, warning and caution notes in these mounting
and operating instructions.
Responsibilities of the operator
Operators are responsible for proper use and compliance with the safety regulations. Opera-
tors are obliged to provide these mounting and operating instructions as well as the refer-
enced documents to the operating personnel and to instruct them in proper operation. Fur-
thermore, operators must ensure that operating personnel or third parties are not exposed to
any danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
well as the referenced documents and observe the specied hazard statements, warnings
and caution notes. Furthermore, operating personnel must be familiar with the applicable
health, safety and accident prevention regulations and comply with them.

EB 8310-4 EN 1-3
Safety instructions and measures
Referenced standards, directives and regulations
According to the ignition risk assessment performed in accordance with Clause5.2 of
ISO80079-36, the non-electrical actuators do not have their own potential ignition source
even in the rare incident of an operating fault. As a result, they do not fall within the scope of
Directive 2014/34/EU.
ÎFor connection to the equipotential bonding system, observe the requirements specied in
Clause6.4 of EN60079-14 (VDE0165-1).
The Type3271 and Type3277 Actuators are partly completed machinery as dened in the
Machinery Directive 2006/42/EC or the Directive 2008 No. 1597 Supply of Machinery
(Safety) Regulations 2008.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
− Mounting and operating instructions for the valve on which it is mounted
− Mounting and operating instructions for mounted valve accessories (positioner, solenoid
valve etc.)
− Safety Manual uSH8310 for use in safety-instrumented systems
− uAB0100 for tools, tightening torques and lubricant
1.1 Notes on possible severe personal injury
DANGER
!
Risk of bursting in the actuator.
Actuators are pressurized. Improper opening can lead to actuator components burst-
ing.
ÎBefore starting any work on the actuator, depressurize all plant sections affected
and the actuator.

1-4 EB 8310-4 EN
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Crush hazard arising from moving parts.
The actuator contains moving parts (actuator stem), which can injure hands or ngers if
inserted into the actuator.
ÎDo not touch the actuator stem or insert hands or nger into the yoke or beneath the
actuator stem while the air supply is connected to the actuator.
ÎWhile working on the actuator, disconnect and lock the pneumatic air supply as well
as the control signal.
ÎDo not impede the movement of the actuator stem by inserting objects into the yoke.
ÎBefore unblocking the actuator stem after it has become blocked (e.g. due to seizing
up after remaining in the same position for a long time), release any stored energy
in the actuator (e.g. spring compression). See 'Relieving the spring compression in
the actuator' in the 'Removal' section.
Risk of personal injury when the actuator vents.
The actuator is operated with air. As a result, air is vented during operation.
ÎInstall the control valve in such a way that vent holes are not located at eye level and
the actuator does not vent at eye level in the work position 1).
ÎUse suitable silencers and vent plugs.
ÎWear eye and hearing protection when working near the actuator.
Risk of personal injury due to preloaded springs.
Actuators with preloaded springs are under tension. These actuators can be identied
by several longer bolts with nuts protruding from the bottom diaphragm case. These
bolts allow the spring compression to be relieved evenly on disassembling the actuator.
Actuators with considerably preloaded springs are also labeled correspondingly (see
the 'Markings on the device' section).
ÎBefore starting any work on the actuator, relieve the compression from the preload-
ed springs. See 'Relieving the spring compression in the actuator' in the 'Removal'
section.
1) If not described otherwise in the valve documentation, the work position for the control valve is the
front view looking onto the operating controls (including valve accessories).

EB 8310-4 EN 1-5
Safety instructions and measures
WARNING
!
Damage to health relating to the REACH regulation.
If a SAMSON device contains a substance which is listed as being a substance of very
high concern on the candidate list of the REACH regulation, this circumstance is indicat-
ed on the SAMSON delivery note.
ÎInformation on safe use of the part affected, see
uwww.samsongroup.com > About SAMSON > Material Compliance > REACH.
Risk of personal injury through incorrect operation, use or installation as a result of
information on the actuator being illegible.
Over time, markings, labels and nameplates on the actuator may become covered with
dirt or become illegible in some other way. As a result, hazards may go unnoticed and
the necessary instructions not followed. There is a risk of personal injury.
ÎKeep all relevant markings and inscriptions on the device in a constantly legible
state.
ÎImmediately renew damaged, missing or incorrect nameplates or labels.
1.3 Notes on possible property damage
NOTICE
!
Risk of actuator damage due to incorrectly attached slings.
ÎDo not attach load-bearing slings to the handwheel or travel stop.
Risk of actuator damage due to excessively high or low tightening torques.
Observe the specied torques when tightening actuator components. Excessive tighten-
ing torques lead to parts wearing out more quickly. Parts that are not tightened far
enough may loosen.
ÎObserve the specied tightening torques (uAB0100).
Risk of actuator damage due to the use of unsuitable tools.
Certain tools are required to work on the actuator.
ÎOnly use tools approved by SAMSON (uAB0100).

1-6 EB 8310-4 EN
Safety instructions and measures
NOTICE
!
Risk of actuator damage due to the use of unsuitable lubricants.
The lubricants to be used depend on the actuator material. Unsuitable lubricants may
corrode and damage surfaces.
ÎOnly use lubricants approved by SAMSON (uAB0100).
1.4 Warnings on the device
Warning Meaning of the warning Location on the device
Warning to indicate that the springs in the
actuator are preloaded.
Actuators with preloaded springs are under
tension. Incorrect opening of the actuator can lead
to personal injury through the sudden and
uncontrolled projection of parts.
Before starting any work on the actuator, relieve
the compression from the preloaded springs. See
'Relieving the spring compression in the actuator'
in the 'Removal' section.

EB 8310-4 EN 2-1
Markings on the device
1
14
15
8
5
2
6
7
9
10
11/12
13
16
3
4
17
Mat:
S/N:
Fig.2-1: Nameplate of Type3271 Actuator
2 Markings on the device
The nameplate shown was up to date at the
time of publishing of this document. The
nameplate on the device may differ from the
one shown.
2.1 Actuator nameplate
The nameplate is stuck on the diaphragm
casing. It includes all details required to
identify the device:
1 Type number
2 Country of origin
3Material conguration number
4 Serial number
5 Actuator area
6 Bench range in bar
7 Bench range in psi
8 Operating travel in mm
9 Operating range in bar
10 Operating range in psi
11 Permissible supply pressure pmax in bar
12 Permissible supply pressure pmax in psi
13 Symbol indicating fail-safe action
Actuator stem extends (FA)
Actuator stem retracts (FE)
Manual override
14 Diaphragm material
15 Connecting thread
16 Date of manufacture
17 Data Matrix code

2-2 EB 8310-4 EN

EB 8310-4 EN 3-1
Design and principle of operation
3 Design and principle of operation
The SAMSON Type3271 and Type3277
Actuators with 355v2cm² actuator area1)
are mounted to Series 240, 250, 280 and
290 Valves (globe valves).
3.1 Type3271
The actuator mainly consists of two dia-
phragm cases (A1, A2), the diaphragm (A4)
with diaphragm plate (A5) and springs
(A10) (see Fig.3-1).
The signal pressure pst creates the force F =
pst · A at the diaphragm surface A which is
opposed by the springs (A10) in the actua-
tor. The bench range is determined by the
number of springs used and their compres-
sion, taking into account the rated travel. The
travel is proportional to the signal pressure
pst. The direction of action of the actuator
stem (A7) depends on how the springs are
installed in the actuator.
1) v2 is added to the actuator area (e.g. 175v2cm²) to indicate actuators with a full diaphragm
A26/27
A16
A8
A4
S
A10
A7
A1
A2
A5
A16
S
A1 Top diaphragm
case
A2 Bottom diaphragm
case
A4 Diaphragm
A5 Diaphragm plate
A7 Actuator stem
A8 Ring nut
A10 Spring
A16 Vent plug
A26/27 Stem connector
clamp
S Signal pressure
connection
Actuator stem extends Actuator stem retracts
Fig.3-1: Functional diagram of Type3271

3-2 EB 8310-4 EN
Design and principle of operation
Several springs may be tted into one anoth-
er.
The stem connector clamps (A26/27) con-
nect the actuator stem (A7) with the plug
stem of the globe valve.
3.2 Type3277
The principle of operation is the same as that
of the Type3271 Actuator. The Type3277
Actuator is tted with an additional yoke on
the bottom diaphragm case (A2) (see
Fig.3-2). The yoke allows the direct attach-
ment of a positioner and/or limit switch. The
benet of this design is that the travel pick-
off located inside the yoke is protected
A1 Top diaphragm
case
A2 Bottom diaphragm
case
A4 Diaphragm
A5 Diaphragm plate
A7 Actuator stem
A8 Ring nut
A10 Spring
A16 Vent plug
A26/27 Stem connector
clamp
S Signal pressure
connection
Actuator stem extends Actuator stem retracts
A26/27
A16
A8
A4
S
A10
A7
A1
A2
A5
S
A16
Fig.3-2: Functional diagram of Type3277

EB 8310-4 EN 3-3
Design and principle of operation
against external inuences.
Refer to the mounting and operating instruc-
tions of the valve accessories to be mounted
for more details on their attachment and the
accessories required.
3.3 Direction of action
The direction of action is determined by how
the springs (A10) and diaphragm plate (A5)
are arranged in the actuator.
With direction of action "actuator stem ex-
tends", the compressed air is applied to the
signal pressure connection on the bottom di-
aphragm case.
With direction of action "actuator stem re-
tracts", the compressed air is applied to the
signal pressure connection on the top dia-
phragm case.
The direction of action can be reversed (see
the 'Service and conversion work' section).
3.4 Signal pressure routing
3.4.1 Type3271
In the "actuator stem extends" version, the
signal pressure is routed through the bottom
signal pressure connection (S) to the bottom
diaphragm chamber and moves the actuator
stem (A7) upward opposing the spring force
(see Fig.3-1, left).
In the "actuator stem retracts" version, the
signal pressure is routed through the top sig-
nal pressure connection (S) to the top dia-
phragm chamber and moves the actuator
stem (A7) downward opposing the spring
force (see Fig.3-1, right).
3.4.2 Type3277
In the "actuator stem extends" version, a sig-
nal pressure connection (S) is located on the
side of the yoke which is connected to the
bottom diaphragm chamber over an internal
hole (see Fig.3-2, left side). The signal pres-
sure moves the actuator stem upward oppos-
ing the spring force. A positioner can be
connected using a connection block at this
point. No additional piping to the actuator is
required. Refer to the associated positioner
documentation for more details.
In the "actuator stem retracts" version, simi-
lar to Type3271, the signal pressure is rout-
ed through the top signal pressure connec-
tion (S) to the top diaphragm chamber and
moves the actuator stem (A7) downward op-
posing the spring force (see Fig.3-2, right).
3.5 Fail-safe action
The listed fail-safe actions apply to
SAMSON Series240, 250, 280 and 290
Valves (globe valves).
When the signal pressure is reduced or the
control signal fails, the fail-safe position of
the control valve depends on whether the
springs are installed in the top or bottom di-
aphragm chamber.
Note

3-4 EB 8310-4 EN
Design and principle of operation
Version with handwheel: in the active man-
ual mode (the handwheel is not in the neu-
tral position), the valve is not moved to the
fail-safe position even upon failure of the
supply air.
3.5.1 Actuator stem extends
When the signal pressure is reduced or the
control signal fails, the springs move the ac-
tuator stem downward and close the globe
valve. The valve opens when the signal pres-
sure is increased enough to overcome the
spring force.
3.5.2 Actuator stem retracts
When the signal pressure is reduced or the
control signal fails, the springs move the ac-
tuator stem upward and open a mounted
globe valve. The valve closes when the signal
pressure is increased enough to overcome
the spring force.
3.6 Versions
Type3271/355v2cm² and
Type3277/355v2cm² Pneumatic Actuators:
− Standard version
The top and bottom diaphragm cases are
made of plastic-coated sheet steel.
− Version with handwheel
The Type3271 and Type3277 Actuators
can be tted with an additional hand-
wheel. The actuator stem position can be
adjusted using the handwheel.
− Travel limitation
The Type3271 and Type3277 Actuators
can be tted with a mechanically adjust-
able travel stop in a special version. The
travel is reduced by up to 50% in both
directions of action (stem extends or re-
tracts).
3.7 Accessories
Vent plugs
Vent plugs are screwed into the exhaust air
ports of pneumatic and electropneumatic de-
vices. They ensure that any exhaust air that
forms can be vented to the atmosphere (to
avoid excess pressure in the device). Further-
more, the vent plugs allow air intake to pre-
vent a vacuum from forming in the device.
uAB07
Lifting xture
A special lifting tool is available to lift pneu-
matic actuators with 355v2cm² actuator ar-
ea (uAB0100).
Feedback connection (travel pick-off inter-
face) according to IEC60534-6-1
Various valve accessories according to
IEC60534-6-1 and NAMUR recommenda-
tion can be mounted on SAMSON control
valves designed according to the modular
principle. See associated valve documenta-
tion. The travel pick-off interface for these
mounted devices can be ordered (accesso-
ries):

EB 8310-4 EN 3-5
Design and principle of operation
Type ...
Actua-
tor
Actuator
area in
cm²
Accessories for
Attachment
on one side
(material
number)
Attachment
on both sides
(item number)
3271 355
100029695
(included in
scope of de-
livery of the
actuator)
1400-5529
3277 355 100029695 1400-5529
3.8 Technical data
The nameplate provides information on the
actuator version (see the 'Markings on the
device' section).
More information is available in Data Sheet
uT8310-1.
Temperature range
The permissible temperature range depends
on the diaphragm material:
Diaphragm material Temperature range
NBR1) –31 to +194°F
–35 to +90°C
EPDM2) –58 to +248°F
–50 to +120°C
PVMQ –76 to +194°F
–60 to +90°C
1) In on/off service, lowest temperature restricted
to –4°F (–20°C).
2) In on/off service, lowest temperature restricted
to –40°F (–40°C).
Supply pressure
The maximum permissible supply pressure is
specied in the order conrmation for the
control valve. It is, however, restricted to
6bar in throttling service. See the ‘Opera-
tion’ section for restrictions in on/off service.
Note

3-6 EB 8310-4 EN
Design and principle of operation
Table 3-1: Dimensions in mm and weights in kg
Actuator Type 3271 3277
Actuator area cm² 355v2
Height
H' 121 121
Ha 15 15
H4ratedFA 90 90
H4maxFA 93 93
H4maxFE 96 96
H5 – 101
Travel limitation H8 115 115
Diameter ØD 280 280
ØD2 16 16
Ød (thread) M30x1.5 M30x1.5
Air connection a/a1 G
3
/
8
3
/
8
NPT
G
3
/
8
3
/
8
NPT
a2 – G
3
/
8
Weight
Without handwheel 15 19

EB 8310-4 EN 3-7
Design and principle of operation
Dimensional drawings
a
a
H'H4
ØD
ØD2
Ød
Ha
H' Ha
a2
H5H4
a1
ØD
ØD2
Ød
Type3271 Type3277
H8
Type3271 with travel stop

3-8 EB 8310-4 EN