Samson 3278 Setup guide

Translation of original instructions
EB 8321 EN
Edition January 2021
Type3278 Pneumatic Rotary Actuator
Actuator area: 160 and 320cm²
Type3278 Pneumatic Rotary Actuator

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 8321 EN
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.

Contents
EB 8321 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...............................................................................1-5
2 Markings on the device ..............................................................................2-1
2.1 Actuator nameplate.....................................................................................2-1
3 Design and principle of operation ...............................................................3-1
3.1 Direction of action.......................................................................................3-1
3.2 Signal pressure routing................................................................................3-1
3.3 Fail-safe action ...........................................................................................3-1
3.4 Versions .....................................................................................................3-3
3.5 Accessories ................................................................................................3-3
3.6 Technical data ............................................................................................3-3
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.....................................................................................4-3
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 Signal pressure connection ..........................................................................5-2
5.2.3 Adjusting the stop bolts ...............................................................................5-2
6 Operation..................................................................................................6-1
6.1 Throttling service.........................................................................................6-1
6.2 Manual mode (versions with handwheel only) ...............................................6-1
7 Malfunctions ..............................................................................................7-1
7.1 Troubleshooting ..........................................................................................7-1
7.2 Emergency action .......................................................................................7-1

Contents
EB 8321 EN
8 Servicing and conversion............................................................................8-1
8.1 Periodic testing ...........................................................................................8-2
8.2 Preparation for servicing or conversion work.................................................8-2
8.3 Mounting the actuator on the valve after service or conversion work ...............8-2
8.4 Service work...............................................................................................8-2
8.4.1 Replacing the diaphragm ............................................................................8-2
8.5 Conversion work.........................................................................................8-3
8.5.1 Changing the fail-safe action/reversing the direction of action .......................8-3
8.5.2 Changing the bench range ..........................................................................8-3
8.6 Ordering spare parts and operating supplies ................................................8-4
9 Decommissioning .......................................................................................9-1
10 Removal ..................................................................................................10-1
10.1 Removing the actuator from the valve .........................................................10-1
10.2 Relieving the spring compression in the actuator..........................................10-1
11 Repairs ....................................................................................................11-1
11.1 Returning devices to SAMSON ..................................................................11-1
12 Disposal...................................................................................................12-1
13 Annex......................................................................................................13-1
13.1 Tightening torques.....................................................................................13-1
13.2 Spare parts ..............................................................................................13-1
13.3 After-sales service.....................................................................................13-3

EB 8321 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Type3278 Actuator is mounted on buttery valves and other nal control ele-
ments with rotary closure members. In combination with the valve, the actuator is used to
shut off the ow of liquids, gases or vapors in the pipeline. The actuator is suitable for both
throttling and on/off service. The actuators can be used in processing and industrial plants.
The actuator is designed to operate under exactly dened conditions (e.g. thrust, opening
angle). Therefore, operators must ensure that the actuator is only used in operating condi-
tions that meet the specications used for sizing the actuator at the ordering stage. In case
operators intend to use the actuator in other applications or conditions than specied, con-
tact 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 spe-
cialized training, their knowledge and experience as well as their knowledge of the applica-
ble standards.

1-2 EB 8321 EN
Safety instructions and measures
Personal protective equipment
We recommend wearing the following personal protective equipment when handling the
Type3278 Pneumatic Rotary Actuator:
− 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3278 Actuator does not have any special safety features.
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 8321 EN 1-3
Safety instructions and measures
Referenced standards, directives and regulations
According to the ignition risk assessment performed in accordance with EN13463-1:2009,
section 5.2, 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 Di-
rective 2014/34/EU.
ÎFor connection to the equipotential bonding system, observe the requirements specied in
section6.4 of EN60079-14 (VDE0165-1).
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.)
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 8321 EN
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Risk of personal injury due to preloaded springs.
Actuators with preloaded springs are under tension.
ÎOnly open the actuator housing to safely relieve the energy of the spring compres-
sion following the instructions in this document. See 'Relieving the spring compres-
sion 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 openings 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 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) 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 8321 EN 1-5
Safety instructions and measures
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 any other mounting parts.
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.
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.
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.
1.4 Warnings on the device
Warning Meaning of the warning Location on the device
Warning to indicate that the springs in the ac-
tuator 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, re-
lieve the compression from the preloaded
springs. See 'Relieving the spring compression
in the actuator' in the 'Removal' section.

1-6 EB 8321 EN

EB 8321 EN 2-1
Markings on the device
2 Markings on the device
2.1 Actuator nameplate
It includes all details required to identify the
device (see Fig.2-1):
1Order number and item
2Actuator type and size
3Max. supply pressure
4 Min. bench range
5 Max. bench range
6Date of manufacture (month and year)
The nameplate is stuck on the housing.
Nameplate
Fig.2-2: Location on the actuator
2
6
1
3
4 5
VETEC Ventiltechnik GmbH
Made in Germany
Auftragsnr./Pos.
Order No/Pos.
Sicherheitsstellung wird vom Anbau des Antriebs an das Ventil bestimmt!
Fail-safe position is determined by the attachment of the actuator to the valve!
Pneumatischer Antrieb/Pneumatic Actuator
Typ
Type
Max. Luftdruck
Max. Air pressure
Federbereich
Spring Range bar min max
bar
Fig.2-1: Nameplate of Type3278 Actuator

2-2 EB 8321 EN

EB 8321 EN 3-1
Design and principle of operation
3 Design and principle of operation
The single-acting Type3278 Rotary Actuator
with spring return mechanism is mounted on
buttery valves and other nal control ele-
ments with rotary closure members.
The rotary actuator mainly consists of the di-
aphragm actuator with diaphragm (20) and
springs (8, 9, 10) and the lever system (2.2)
with actuator stem (2.1) and actuator shaft
(2.3) inside the housing.
The signal pressure creates a force at the
diaphragm surface which is opposed by the
springs (8, 9, 10) in the actuator. The travel
movement of the actuator stem (2.1), which
is proportional to the signal pressure, is
transferred to the lever system (2.2) where it
is converted into a rotary motion. The
number of springs and their compression
determine the signal pressure range and the
useable actuator torque. The two externally
accessible stop bolts (42) can be used to
limit the lower and upper opening angles.
3.1 Direction of action
The direction of action is determined by how
the actuator is mounted on the valve. The re-
versal of the direction of action depends on
the valve on which the actuator is mounted if
the valve's direction of rotation or the fail-
safe position of the entire valve assembly is
to be changed. In this case, remove the valve
from the actuator housing and mount it on
the opposite ange (see the 'Servicing and
conversion' section).
3.2 Signal pressure routing
When the signal pressure fails, the mounted
valve is moved to its fail-safe position. The
actuator springs open or close the valve, de-
pending on whether the valve is mounted on
the housing ange 1 or 2. '1' or '2' is cast
on the corresponding side of the housing.
3.3 Fail-safe action
When the signal pressure is reduced or the
air supply fails, the installed springs move
the actuator stem in a linear motion causing
the lever system to turn the actuator shaft to
its end position. This causes the valve to
move to its fail-safe position determined by
the direction of action.
Fail-close valve
Valve mounted on housing ange 2: the
actuator springs close the mounted valve
when the pressure acting on the diaphragm
decreases and when the supply air fails. The
valve opens opposing the force of the
actuator springs when the signal pressure
increases.
Fail-open valve
Valve mounted on housing ange 1: the
actuator springs open the mounted valve
when the pressure acting on the diaphragm
decreases and when the supply air fails. The
valve closes opposing the force of the
actuator springs when the signal pressure
increases.

3-2 EB 8321 EN
Design and principle of operation
1
20
5
24
Feder 9
Feder 10
Feder 8
Flansch 1
Flansch
2
16
17
42.2 42.1
2.1
2.2
2.3
27
42.2 42.1
15
19
40
44
11
1Diaphragm case
2.1 Actuator stem
2.2 Lever system
2.3 Actuator shaft
5 Housing
8, 9, 10 Springs
8 Spring number 1
9 Spring number 2
10 Spring number 3
11 Signal pressure connection
15 Centering plate
16 Intermediate piece
17 Fastening bracket
19 Diaphragm plate
20 Diaphragm
24 Vent plug
27 Handwheel
40 Screw
42 Stop bolts
44 Screw
Fig.3-1: Functional diagram of Type3278

EB 8321 EN 3-3
Design and principle of operation
3.4 Versions
Version with handwheel
A handwheel can be retrotted.
The spindle acts on the lever system of the
valve to position the valve manually.
3.5 Accessories
Handwheel
Actuator area Handwheel material
number
160cm² 1690-3394
320cm² 1690-6699
Positioner mounting kit
A mounting kit with a bracket, intermediate
piece and screws is required to attach a
non-SAMSON positioner (according to VDI/
VDE3845). The positioner is mounted on the
side opposite to the ange connection.
Actuator area Material number of
mounting kit
160cm² 1400-5890
320cm² 1400-5891
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
Actuator springs
Actuator
area
Material no.
Spring8 Spring9 Spring10
160cm² 0270-2055 0270-2056 0270-2057
320cm² 0270-2234 0270-2235 0270-2236
3.6 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8321.
Note

3-4 EB 8321 EN
Design and principle of operation
Table 3-1: Technical data for Type3278
Permissible signal pressure 6bar
Actuator area 160cm² · 320cm²
Opening angle 90°
No. of springs 3
Signal pressure ranges 7 (through different spring combinations)
Permissible temperatures –35 to +90°C in continuous operation
Table 3-2: Materials
Enclosure EN-JS1049, powder coating
Rolling diaphragm NBR (nitrile butadiene rubber) with fabric reinforcement (polyester)
Diaphragm plate Sheet steel, zinc plated/chromate coating
Springs 55 Si Cr 6
Actuator stem St 37, zinc plated/chromate coating
Actuator shaft EN-JS1049, zinc plated/chromate coating
Table 3-3: Dimensions in mm and weights in kg
Actuator
area ØD H H1 H2 C B ØE ØF2) Øa b (ap- prox.)
Connecting
anges accord-
ing to
DINISO5211
Weight,
approx.
160cm² 225 332 260 72 132 118 110 161)
20/25 180 120 F07 16
320cm² 295 516 421 95 183 162 150 251)
40 250 150 F12 50
1) Standard version for Type3331 Buttery Valve
2) Hollow shaft with four keyways offset by 90° to accommodate the shaft of the valve (shaft end with
feather key notch according to DIN6885)

EB 8321 EN 3-5
Design and principle of operation
Dimen-
sional
drawings
G¼
B
C
H1
H
H2
4
ØD
ØF
ØE
a
b
Stop bolts to
limit opening
angle
Flange2
Flange1

3-6 EB 8321 EN

EB 8321 EN 4-1
Shipment and on-site transport
4 Shipment and on-site trans-
port
The work described in this section is only to
be performed by personnel appropriately
qualied to carry out such tasks.
4.1 Accepting the delivered
goods
After receiving the shipment, proceed as fol-
lows:
1. Check the scope of delivery. Check that
the specications on the actuator name-
plate match the specications in the de-
livery note. See the 'Markings on the de-
vice' section for nameplate details.
2. Check the shipment for transportation
damage. Report any damage to
SAMSON and the forwarding agent
(refer to delivery note).
3. Determine the weight and dimensions of
the units to be lifted and transported in
order to select the appropriate lifting
equipment and lifting accessories. Refer
to the transport documents and the 'Tech-
nical data' section.
4.2 Removing the packaging
from the actuator
Observe the following sequence:
ÎDo not open or remove the packaging
until immediately before mounting the
actuator.
ÎLeave the actuator in its transport con-
tainer or on the pallet to transport it on
site.
ÎDispose and recycle the packaging in ac-
cordance with the local regulations.
4.3 Transporting and lifting the
actuator
Danger due to suspended loads falling.
ÎStay clear of suspended or moving
loads.
ÎClose off and secure the transport paths.
Risk of lifting equipment tipping over and
risk of damage to lifting accessories due to
exceeding the rated lifting capacity.
ÎOnly use approved lifting equipment and
accessories whose minimum lifting ca-
pacity is higher than the weight of the
actuator (including the packaging, if ap-
plicable).
Risk of personal injury due to the actuator
tipping.
ÎObserve the actuator's center of gravity.
ÎSecure the actuator against tipping over
or turning.
DANGER
!
WARNING
!
WARNING
!

4-2 EB 8321 EN
Shipment and on-site transport
Risk of injury due to incorrect lifting without
the use of lifting equipment.
Lifting the actuator without the use of lifting
equipment may lead to injuries (back injury
in particular) depending on the weight of the
actuator.
ÎObserve the occupational health and
safety regulations valid in the country of
use.
Risk of actuator damage due to incorrectly
attached slings.
ÎDo not attach load-bearing slings to the
handwheel or any other mounting parts.
ÎObserve lifting instructions (see sec-
tion4.3.2).
Our after-sales service can provide more
detailed transport and lifting instructions on
request.
4.3.1 Transporting the actu-
ator
The actuator can be transported using lifting
equipment (e.g. crane or forklift).
ÎLeave the actuator in its transport con-
tainer or on the pallet to transport it.
ÎObserve the transport instructions.
Transport instructions
− Protect the actuator against external in-
uences (e.g. impact).
− Do not damage the corrosion protection
(paint, surface coatings). Repair any
damage immediately.
− Protect the actuator against moisture and
dirt.
− Observe permissible temperatures (see
'Technical data' in the 'Design and prin-
ciple of operation' section).
4.3.2 Lifting the actuator
To mount large actuators onto the valve, use
lifting equipment (e.g. crane or forklift) to lift
it.
Lifting instructions
− Use a hook with safety latch to secure the
slings from slipping off the hook during
lifting and transporting.
− Attach the slings in such a way that the
slings attached to the actuator housing
bear the entire load. Any other slings on-
ly serve to stabilize the position for trans-
porting.
− Secure slings on the object to be trans-
ported against slipping.
− Make sure the slings can be removed
from the actuator once it has been
mounted on the valve.
− Prevent the actuator from tilting or tip-
ping.
WARNING
!
NOTICE
!
Tip