Samson 3372 Service manual

Translation of original instructions
EB 8313-1 EN
Edition September 2019
Type3372 Electropneumatic Actuator
With integrated i/p converter
Actuator area: 120cm²
3321-IP Control Valve
Type3372 Electropneumatic Actuator with Type3321 Valve

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
Department (aftersalesser[email protected]om).
The mounting and operating instructions for the devices are included in
the scope of delivery. The latest documentation is available on our web-
site at www.samsongroup.com > Service & Support > Downloads > Doc-
umentation.
Definition 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 8313-1 EN

Contents
EB 8313-1 EN
1 Safety instructions and measures ................................................................1-1
1.1 Notes on possible severe personal injury ......................................................1-4
1.2 Notes on possible personal injury ................................................................1-4
1.3 Notes on possible property damage.............................................................1-6
2 Markings on the device ..............................................................................2-1
2.1 Actuator nameplate.....................................................................................2-1
2.2 Label indicating actuator with preloaded springs...........................................2-2
3 Design and principle of operation ...............................................................3-1
3.1 Accessories ................................................................................................3-3
3.2 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.............................................................................4-1
4.3.2 Lifting the actuator ......................................................................................4-2
4.4 Storing the actuator.....................................................................................4-2
5 Mounting and assembly .............................................................................5-1
5.1 Preparation for mounting.............................................................................5-1
5.2 Mounting the actuator .................................................................................5-1
5.2.1 Mounting the actuator onto the valve............................................................5-2
5.2.2 Connecting the air supply............................................................................5-4
5.2.3 Connect the electrical power supply..............................................................5-5
6 Start-up .....................................................................................................6-1
6.1 Checking and adjusting zero and span.........................................................6-2
6.2 Deactivating and activating the tight-closing function .....................................6-5
6.3 Version with limit switch — Adjustment.........................................................6-5
7 Operation..................................................................................................7-1
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-2
9 Service and conversion work ......................................................................9-1
9.1 Periodic testing ...........................................................................................9-1
9.2 Service or conversion work..........................................................................9-1
9.3 Ordering spare parts and operating supplies ................................................9-2

Contents
EB 8313-1 EN
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.....................................................................................15-1

EB 8313-1 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Type3372 Electropneumatic Actuator is used for attachment to SAMSON Se-
ries V2001 Valves, such as Type3321, Type3323, Type3531, Type3535 and Type3214
(DN65 to 100) as well as Type3260 Valve (DN65 and 80). In combination with the valve,
the actuator is used to shut off or mix the ow of liquids, gases or vapors in the pipeline. De-
pending on the version, the actuator is suitable for throttling or on/off service. The actuator
can be used in processing and industrial plants.
The actuator is designed to operate under exactly dened conditions (e.g. thrust, travel).
Therefore, operators must ensure that the actuator is only used in operating conditions 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, contact SAM-
SON.
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 in these instructions
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 are to be observed. Accord-
ing 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 appli-
cable standards.

1-2 EB 8313-1 EN
Safety instructions and measures
Explosion-protected versions of this device must be operated only by personnel who has un-
dergone special training or instructions or who is authorized to work on explosion-protected
devices in hazardous areas.
Personal protective equipment
We recommend wearing the following personal protective equipment when handling the
Type3372 Electropneumatic Actuator:
−Safety gloves and safety footwear (ESD footwear, if necessary) when mounting or remov-
ing 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 features
The Type3372 Electropneumatic Actuator does 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. They must observe all hazard
statements, warning and caution notes in these mounting and operating instructions.
Hazards resulting from the special working conditions at the installation site of the actuator
must be identied in a risk assessment and prevented through the corresponding safety in-
structions drawn up by the operator.
Responsibilities of the operator
The operator is responsible for proper operation and compliance with the safety regulations.
Operators are obliged to provide these mounting and operating instructions as well as the
referenced documents to the operating personnel and to instruct them in proper operation.
Furthermore, the operator must ensure that operating personnel or third persons are not ex-
posed to any danger.

EB 8313-1 EN 1-3
Safety instructions and measures
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, the operating personnel must be familiar with the applicable
health, safety and accident prevention regulations and comply with them.
Servicing explosion-protected devices
If a part of the device on which the explosion protection is based needs to be serviced, the
device must not be put back into operation until a qualied inspector has assessed it accord-
ing to explosion protection requirements, has issued an inspection certicate or given the de-
vice a mark of conformity. Inspection by a qualied inspector is not required if the manufac-
turer performs a routine test on the device before putting it back into operation. Document
the passing of the routine test by attaching a mark of conformity to the device. Replace ex-
plosion-protected components only with original, routine-tested components by the manufac-
turer.
Devices that have already been operated outside hazardous areas and are intended for fu-
ture use inside hazardous areas must comply with the safety requirements placed on serviced
devices. Before being operated inside hazardous areas, test the devices according to the
specications for servicing explosion-protected devices.
Maintenance, calibration and work on equipment
ÎOnly use intrinsically safe current/voltage calibrators and measuring instruments for in-
terconnection with intrinsically safe circuits to check or calibrate the equipment inside or
outside hazardous areas.
ÎObserve the maximum permissible values specied in the certicates for intrinsically safe
circuits.
Referenced standards and regulations
Devices with a CE marking fulll the requirements of the Directives 2014/34/EU and
2014/30/EU. The 'Certicates' section contains this declaration of conformity.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
−Mounting and operating instructions for the mounted valve
−Mounting and operating instructions for mounted valve accessories (e.g. uEB8367 for
Type4744 Limit Switch)
−uAB0100 for tools, tightening torques and lubricant

1-4 EB 8313-1 EN
Safety instructions and measures
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.
Risk of fatal injury due to the ignition of an explosive atmosphere.
Incorrect installation, operation or servicing of the electropneumatic actuator in poten-
tially explosive atmospheres may lead to ignition of the atmosphere and cause death.
ÎThe following regulations apply to installation in hazardous areas: EN60079-14
(VDE0165, Part1).
ÎInstallation, operation or servicing of the electropneumatic actuator must only per-
formed by personnel who has undergone special training or instructions or who is
authorized to work on explosion-protected devices in hazardous areas.
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.

EB 8313-1 EN 1-5
Safety instructions and measures
WARNING
!
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.
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).

1-6 EB 8313-1 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
Risk of actuator damage due to excessively high supply pressure.
An excessively high supply pressure can lead to impermissible movements or forces
which might damage the actuator.
ÎObserve supply pressure restrictions. See the 'Operation' section.
ÎRestrict the supply pressure by using a suitable supply pressure reducing station.
An incorrect electric signal will damage the electropneumatic actuator.
A current source must be used to provide the electrical power for the actuator.
ÎOnly use a current source and never a voltage source.
Incorrect assignment of the terminals will damage the electropneumatic actuator and
will lead to malfunction.
For the actuator to function properly, the prescribed terminal assignment must be ob-
served.
ÎConnect the electrical wiring according to the prescribed terminal assignment.
Risk of actuator damage due to excessively high or low tightening torques.
Observe the specied torques on tightening actuator components. Excessively tightened
torques lead to parts wearing out quicker. 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).
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 the surface.
ÎOnly use lubricants approved by SAMSON (uAB0100).

EB 8313-1 EN 2-1
Markings on the device
2 Markings on the device
2.1 Actuator nameplate
The nameplate is stuck on the diaphragm casing. It includes all details required to identify the
device:
1 Actuator area
2 Model no.
3Conguration ID
4 Serial number
5 Max. supply pressure pmax in bar or psi
6 Month and year of manufacture
7Symbol indicating fail-safe action
Actuator stem extends (FA)
Actuator stem retracts (FE)
8 Operating travel in mm
9 Bench range in bar
10 Bench range in psi
11 Symbol indicating manual
override
12 Data Matrix code
13 Reference variable in mA
14 Degree of protection
15 ID of the notied body
16 Explosion protection specications
SAMSON AG D-60314 Frankfurt
See technical data for ambient temperature
actuator cm²
Model 3372-
Var-ID Serial no.
Air supply max.
SAMSON 3372
Made in Germany
1
3 4
Input 13 5 14
2
6
8
7
12
9
10
11
Fig.2-1: Nameplate of Type3372 Actuator with integrated i/p converter without explosion
protection
SAMSON AG D-60314 Frankfurt
See technical data and explosion-protection certificate for
permissible ambient temperature and maximum values
for connection to certified instrinsically safe circuits.
actuator cm²
Model 3372-
Var-ID Serial no.
Air supply max.
SAMSON 3372
Made in Germany
1
3 4
Input 13
5 14
2
15
8
7
12
9
10
11
16
Fig.2-2: Nameplate of Type3372 Actuator with integrated i/p converter in explosion-protected
version

2-2 EB 8313-1 EN
Markings on the device
2.2 Label indicating actuator with preloaded springs
A label on the actuator indicates that the actuator springs are preloaded in the delivered
state (see Fig.2-3).
ACHTUNG !
VORGESPANNTER
ANTRIEB
ATTENTION !
PRE-LOADED
ACTUATOR
ATTENTION !
SERVO-MOTEUR
PRECONTRAINT
Fig.2-3: Adhesive label indicating preloaded actuator springs in the delivered state

EB 8313-1 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
The actuators are used for attachment to
Series V2001 Valves, such as Type3321,
Type3323, Type3531, Type3535 and
Type3214 (DN65 to 100) as well as
Type3260 Valve (DN65 and 80).
The actuators mainly consist of two dia-
phragm cases, a rolling diaphragm and
springs. They are tted with an i/p converter
and a pneumatic control unit for throttling
service. The converter and the control unit
are installed in the bottom diaphragm case
of actuators with fail-safe action "actuator
stem extends" and in the top diaphragm
case of actuators with fail-safe action "actu-
ator stem retracts".
The control signal issued by the controller is
transmitted as a 4 to 20mA reference vari-
able to the electropneumatic converter where
it is converted into a proportional pressure
signal. The pressure signal produces a force
which acts on the surface of the measuring
diaphragm (11) and is compared to the
force of the range spring (13). The move-
ment of the measuring diaphragm is trans-
mitted by the lever (12) to the force switch
(15) to produce a corresponding signal pres-
sure.
Changes in the input signal or the valve po-
sition cause a change in the actuator stem
position corresponding to the reference vari-
able.
The actuator is fastened to the valve bonnet
using a central nut. (form B, see Fig.3-1).
Fig.3-1: Mounting using a central nut (form B
attachment)
Tight-closing function
The electropneumatic actuator is completely
lled with air or vented as soon as the refer-
ence variable falls below or exceeds a cer-
tain value.
Actuator stem extends
Deactivation function which is triggered
when the signal falls below the switching
point of 4.08mA: the actuator is fully vent-
ed, causing a globe valve to close tightly. In
three-way valves, port B is closed when the
valve is used for mixing service and port Ais
closed when the valve is used for diverting
service.
Actuator stem retracts
Activation function which is triggered when
the signal exceeds the switching point of
19.95mA: the actuator is lled with air,
causing a globe valve to close tightly. In
three-way valves, port B is closed when the
valve is used for mixing service and port Ais
closed when the valve is used for diverting
service.

3-2 EB 8313-1 EN
Design and principle of operation
8.7
8.6
14
14
8.9
8.8
8.7
15
ip
10
10.1
11
12
13
14
i
8.4
8.3
8.1
8.2
7
6
16
8.5
6 Nut
7Stem connector
8.1 Actuator stem
8.2 Rod-type yoke
8.3 Actuator springs
8.4 Rolling diaphragm
8.5 Signal pressure connection (actuator
stem extends)
8.6 Vent plug
8.7 Stopper (pressure gauge)
8.8 Plug connector
8.9 Cover plate (span and tight-closing
function)
10 i/p converter
10.1 Potentiometer for span
11 Measuring diaphragm
12 Lever
13 Range spring
14 Zero adjuster
15 Force switch
16 Rod nut
Functional drawing of positioner
Actuator stem extends
Actuator stem retracts
Fig.3-2: Type3372 Electropneumatic Actuator

EB 8313-1 EN 3-3
Design and principle of operation
3.1 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 the
electropneumatic actuator with 120cm² ac-
tuator area (uAB0100).
3.2 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8313.
Compliance
The Type3372 Pneumatic Actuator with
integrated i/p converter bears the CE and
EAC marks of conformity.
Note
Table 3-1: Technical data of Type3372 Electropneumatic Actuator with integrated i/p
converter
Actuator area 120cm²
Rated travel 15mm
Tight-closing function Stem retracts Stem extends Stem retracts Stem extends
Nominal signal range 0.4 to 1.4 1.4 to 2.3 1.4 to 2.3 2.1 to 3.3
Supply pressure Max. 6 bar Max. 4 bar Max. 4 bar Max. 6 bar
Reference variable 4 to 20mA · Minimum current 3.6mA
Load impedance ≤6V (300Ω at 20mA)
Span adjustment 25% of travel range using potentiometer
Direction of action Increasing/increasing, xed
Characteristic Linear · Deviation from terminal-based conformity ≤2%
Hysteresis ≤1%
Variable position ≤7%
Tight-closing function
(can be activated by a
jumper)
Stem extends Deactivation at ≤4.08mA
Stem retracts Activation at ≥19.95mA
Switching accuracy: 0.14mA

3-4 EB 8313-1 EN
Design and principle of operation
Actuator area 120cm²
Air consumption in steady state
When w= 100%:
6bar≤ 200ln/h
4bar≤ 160ln/h
Temperature range –30 to +70°C
Degree of protection IP541)
Electrical connection
Cable socket according to DINEN175301-803, black
polyamide, 8 to 10mm clamping range
Screw terminals for up to 1.5mm² wire cross-section
Explosion protection
certication
(optional):
ATEX
Number PTB99ATEX2049
Date 1999-07-06
Type of
protection II2GExiaIICT6
Weight 3.7kg
Limit switch Type4744-2
Type of protection Flameproof enclosure II 2G Exdb IIC T6-T5
Permissible load AC voltage: 250V/5A
DC voltage: 250V/0.4A
Permissible ambient temperature –20 to +60°C
Degree of protection IP66
Weight (approx. kg) 0.4
1) IP 65 if the vent plug is replaced by a lter check valve (order no. 1790-7408)
Dimensional drawings
Ø30 Ø30
Ø168
309
236
Ø168
PG11
G
1
/
8
G ¼
Supply
G ¼
Vent plug
Pressure
gauge
connection
Fig.3-3: Dimensions in mm

EB 8313-1 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 qualied for the
assignment accordingly.
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
nameplate match the specications in the
delivery note. See the 'Markings on the
device' 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 packaging to
transport it on site.
ÎDispose and recycle the packaging in ac-
cordance with the local regulations.
4.3 Transporting and lifting the
actuator
Due to the low service weight, lifting equip-
ment is not required to lift and transport the
actuator (e.g. to mount it onto a valve). If lift-
ing equipment (e.g. crane or forklift) is to be
used, we have a lifting xture available for
the actuator (see 'Accessories' in the 'Design
and principle of operation' section).
4.3.1 Transporting the
actuator
ÎLeave the actuator in its packaging 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
principle of operation' section).

4-2 EB 8313-1 EN
Shipment and on-site transport
4.3.2 Lifting the actuator
See valve documentation for more informa-
tion on lifting the entire control valve assem-
bly.
4.4 Storing the actuator
Risk of actuator damage due to improper
storage.
ÎObserve the storage instructions.
ÎAvoid long storage times.
ÎContact SAMSON in case of different
storage conditions or long storage peri-
ods.
We recommend regularly checking the actu-
ator and the prevailing storage conditions
during long storage times.
Storage instructions
−When the valve and actuator are al-
ready assembled, observe the storage
conditions for control valves. See associ-
ated valve documentation.
−Protect the actuator against external in-
uences (e.g. impact).
−Secure the actuator in the stored position
against slipping or tipping over.
−Do not damage the corrosion protection
(paint, surface coatings). Repair any
damage immediately.
−Protect the actuator against moisture and
dirt. Store it at a relative humidity of less
than 75%. In damp spaces, prevent con-
densation. If necessary, use a drying
agent or heating.
−Make sure that the ambient air is free of
acids or other corrosive media.
−Observe permissible temperatures (see
'Technical data' in the 'Design and prin-
ciple of operation' section).
−Do not place any objects on the actuator.
Special storage instructions for elastomers
Elastomer, e.g. actuator diaphragm
−To keep elastomers in shape and to pre-
vent cracking, do not bend them or hang
them up.
−We recommend a storage temperature of
15°C for elastomers.
−Store elastomers away from lubricants,
chemicals, solutions and fuels.
Our after-sales service can provide more de-
tailed storage instructions on request.
Note
NOTICE
!
Note
Tip

EB 8313-1 EN 5-1
Mounting and assembly
5 Mounting and assembly
The work described in this section is only to
be performed by personnel qualied for the
assignment accordingly.
Risk of fatal injury due to the ignition of an
explosive atmosphere.
Incorrect installation, operation or servicing
of the electropneumatic actuator in poten-
tially explosive atmospheres may lead to ig-
nition of the atmosphere and cause death.
ÎThe following regulations apply to
installation in hazardous areas:
EN60079-14 (VDE0165, Part1).
ÎWork must only performed by personnel
who has undergone special training or
instructions or who is authorized to work
on explosion-protected devices in haz-
ardous areas.
5.1 Preparation for mounting
Before mounting, make sure the following
conditions are met:
−The actuator is not damaged.
−The type designation, material and tem-
perature range of the actuator match the
ambient conditions (temperatures etc.).
See the 'Markings on the device' section
for nameplate details.
Proceed as follows:
ÎLay out the necessary material and tools
to have them ready during mounting.
ÎCheck that the vent plugs to be used are
not blocked.
ÎCheck any pressure gauges mounted on
valve accessories to make sure they func-
tion properly.
ÎWhen the valve and actuator are al-
ready assembled, check the tightening
torques of the bolted joints (uAB0100).
Components may loosen during trans-
port.
5.2 Mounting the actuator
Depending on the version, SAMSON control
valves are either delivered with the actuator
already mounted on the valve or the valve
and actuator are delivered separately. When
delivered separately, the valve and actuator
must be assembled together on site. Proceed
as follows to mount the actuator and before
start-up.
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,
air is vented during operation.
ÎDuring mounting make sure that vent
holes are not located at eye level in the
work position of the control valve and the
actuator does not vent at eye level in the
work position.
ÎWear eye and hearing protection when
working near the actuator.
DANGER
!
WARNING
!WARNING !

5-2 EB 8313-1 EN
Mounting and assembly
Crush hazard arising from the moving actu-
ator stem.
ÎDo not touch the actuator stem or insert
hands or nger into the yoke while the
air supply is connected to the actuator.
ÎBefore working on the actuator, discon-
nect and lock the pneumatic air supply
as well as the control signal.
ÎDo not impede the movement of the actu-
ator 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 actuator damage due to excessively
high or low tightening torques.
Observe the specied torques on tightening
actuator components. Excessively tightened
torques lead to parts wearing out quicker.
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.
ÎOnly use tools approved by SAMSON
(uAB0100).
5.2.1 Mounting the actuator
onto the valve
To mount the actuator on the valve, proceed
as follows:
The valve and actuator are assembled with
special attention paid to the actuator's bench
range and direction of action. These details
are specied on the actuator nameplate (see
the 'Markings on the device' section).
See Fig.5-1
1. Connect the air supply (see sec-
tion5.2.2).
2. Connect the electrical power supply (see
section5.2.3).
3. Move the actuator stem to its correct po-
sition:
"Stem extends" fail-safe action: apply a
signal pressure to actuators to retract the
actuator stem. If no signal pressure or
electric control signal is available during
the mounting procedure, tighten the hex
nut (6) against the force of the preloaded
springs using a hexagonal wrench with
width across ats (SW36).
WARNING
!WARNING !
NOTICE
!
NOTICE
!
Tip