Samson 3371 Series Service manual

Mounting and
Operating Instructions
EB 8317 EN
Translation of original instructions
Edition November 2016
Type3371 with 120cm² actuator area Type3371 with 350cm² actuator area
Type3371 Pneumatic Actuator
Actuator area: 120 and 350cm²

2 EB 8317 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.
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]).
The mounting and operating instructions for the devices are included in
the scope of delivery. The latest documentation is available on our website
(www.samson.de) > Product documentation. You can enter the document
number or type number in the [Find:] eld to look for a document.
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

Contents
EB 8317 EN 3
1 Safety instructions and measures ...................................................................5
1.1 Notes on possible severe personal injury .........................................................7
1.2 Notes on possible personal injury ...................................................................7
1.3 Notes on possible property damage ................................................................8
2 Markings on the device ...............................................................................10
2.1 Actuator nameplate ......................................................................................10
3 Design and principle of operation ................................................................12
3.1 Direction of action ........................................................................................12
3.2 Signal pressure routing .................................................................................12
3.3 Fail-safe action ............................................................................................15
3.3.1 Version with direction of action "actuator stem extends" (FA) ...........................15
3.3.2 Version with direction of action "actuator stem retracts" (FE) ............................15
3.4 Mounting types ............................................................................................15
3.5 Versions ......................................................................................................17
3.6 Technical data .............................................................................................17
4 Measures for preparation............................................................................19
4.1 Unpacking ..................................................................................................19
4.2 Transporting and lifting ................................................................................19
4.2.1 Transporting ................................................................................................19
4.2.2 Lifting ..........................................................................................................19
4.3 Storage .......................................................................................................19
4.4 Preparation for installation ............................................................................21
5 Mounting and start-up.................................................................................22
5.1 Mounting the actuator onto the valve .............................................................22
5.1.1 120cm² version ..........................................................................................24
5.1.2 350cm² version ..........................................................................................26
5.2 Changing the mounting type .........................................................................27
5.2.1 Changing the mounting type to mounting using rods (FormB to FormC) ..........27
5.2.2 Changing the mounting type to mounting using a crossbeam
(FormC to FormB) .......................................................................................28
5.3 Preloading the springs ..................................................................................28

4 EB 8317 EN
Contents
5.3.1 Increasing the actuator thrust ........................................................................29
5.3.2 Adapting the travel range .............................................................................29
5.4 Additional ttings .........................................................................................30
6 Operation...................................................................................................31
6.1 On/off service .............................................................................................31
6.2 Reversal of the direction of action ..................................................................31
6.2.1 120cm² version ..........................................................................................32
6.2.2 350cm² version ..........................................................................................34
6.3 Version with travel stop .................................................................................36
6.3.1 Bottom travel stop (minimum travel) ...............................................................36
6.3.2 Top travel stop (maximum travel) ...................................................................37
6.4 Version with handwheel ................................................................................37
6.4.1 Operating the handwheel of version with "stem extends" direction of action .....37
6.4.2 Operating the handwheel of version with "stem retracts" direction of action ......37
7 Servicing.....................................................................................................38
7.1 Replacing the diaphragm .............................................................................39
7.1.1 120cm² version ..........................................................................................39
7.1.2 350cm² version ..........................................................................................41
7.2 Preparation for return shipment .....................................................................44
7.3 Ordering spare parts and operating supplies .................................................44
8 Malfunctions ...............................................................................................45
9 Decommissioning and disassembly ..............................................................46
9.1 Decommissioning .........................................................................................46
9.2 Removing the actuator from the valve ............................................................46
9.2.1 120cm² version ..........................................................................................46
9.2.2 350cm² version ..........................................................................................47
9.3 Relieving the spring compression in the actuator .............................................47
9.4 Disposal ......................................................................................................47
10 Annex.........................................................................................................48
10.1 After-sales service ........................................................................................48
10.2 Spare parts .................................................................................................49

EB 8317 EN 5
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Type3371 Actuator is designed for operating a mounted globe valve. In com-
bination 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 on/off service. The actuator can be used in process-
ing 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 applications 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 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 in the technical data
−Use outside the limits dened by the accessories mounted on 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.

6 EB 8317 EN
Safety instructions and measures
Personal protective equipment
We recommend wearing the following personal protective equipment when handling the
Type3371 Pneumatic Actuator:
−Protective gloves when mounting or removing the actuator
ÎCheck with the plant operator for details on further protective equipment.
Revisions and other modications
Revisions, conversions or other modications to 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3371 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 process medium, the operating
pressure, the signal pressure or by moving parts by taking appropriate precautions. They
must observe all hazard statements, warning and caution notes in these mounting and oper-
ating instructions, especially for installation, start-up, and service work.
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.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
well as the referenced documents and observe the hazard statements, warning and caution
notes specied in them. Furthermore, the operating personnel must be familiar with the ap-
plicable health, safety and accident prevention regulations and comply with them.

EB 8317 EN 7
Safety instructions and measures
Referenced standards 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 Part 1).
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
−Mounting and operating instructions for the mounted valve e.g. uEB8111 for
SAMSON Type3321 Valve
−Mounting and operating instructions for mounted valve accessories (positioner, solenoid
valve etc.)
−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 con-
cerned and the actuator.

8 EB 8317 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 insert hands or ngers into the yoke while the valve is in operation.
ÎWhile working on the actuator, disconnect and lock the pneumatic air supply as well
as the control signal.
Risk of personal injury due to preloaded springs.
Actuators with preloaded springs are under tension. They can be identied by the long
bolts protruding from the bottom of the actuator.
ÎBefore starting any work on the actuator, relieve the compression from the preload-
ed springs (see section9.3).
Risk of personal injury when the actuator vents.
While the valve is operating, the actuator may vent when the valve opens or closes.
ÎInstall the control valve in such a way that the actuator does not vent at eye level.
ÎUse suitable silencers and vent plugs.
ÎWear eye protection when working in close proximity to the control valve.
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http://www.samson.de/reach-en.html.

EB 8317 EN 9
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
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 valve surface.
ÎOnly use lubricants approved by SAMSON (uAB0100).

10 EB 8317 EN
Markings on the device
2 Markings on the device
2.1 Actuator nameplate
The nameplate is stuck on the diaphragm
casing (see Fig.1). The nameplate of the
Type3371 with 120cm² actuator area is lo-
cated on the bottom diaphragm case. The
nameplate of the Type3371 with 350cm²
actuator area is located on the top dia-
phragm case.
It includes all details required to identify the
device (see Fig.2):
1 Type designation
2 Conguration ID
3 Serial number
4 Permissible supply pressure pmax in
bar/psi
5 Bench range in bar
6 Bench range in psi
7 Operating travel in mm
8Symbol indicating fail-safe action
Actuator stem extends (FA)
Actuator stem retracts (FE)
9 Date of manufacture (month and year)
Nameplate
Fig.1: Location of nameplate
SAMSON 3371
Pneumatic Actuator 120 cm²
Model
Var.-ID Serial no.
Air supply max.
SAMSON AG D-60314 Frankfurt Made in Germany
See technical data for ambient temperature
!
1
8
2 3
4
7
5
6
9
Fig.2: Example for nameplate

EB 8317 EN 11

12 EB 8317 EN
Design and principle of operation
3 Design and principle of oper-
ation
The Type3371 Pneumatic Actuators have an
actuator area of either 120 or 350cm².
They are mainly used for attachment to Se-
ries V2001 Valves:
−Type 3321 Globe Valve
−Type3323 Three-way Valve
−Type3531 Globe Valve for Heat Transfer
Oil
−Type3535 Three-way Valve for Heat
Transfer Oil
Table1 provides an overview of the possible
combinations and how the actuator is
mounted on the valve.
The pneumatic actuators mainly consist of
two diaphragm cases, a diaphragm, and in-
ternal springs. The actuator is connected to
the valve bonnet using a rod-type yoke. The
stem connector clamps connect the actuator
stem with the plug stem of the valve.
The signal pressure pst creates the force F =
pst · A at the diaphragm surface A, which is
opposed by the springs in the actuator. The
bench range is determined by the number of
springs used and their compression, taking
into account the rated travel. The travel is
proportional to the signal pressure pst.
3.1 Direction of action
The direction of action is determined by how
the springs and diaphragm plate are ar-
ranged in the actuator. With direction of ac-
tion "actuator stem retracts", the compressed
air is applied to the signal pressure connec-
tion on the top diaphragm case. With direc-
tion of action "actuator stem extends", the
compressed air is applied to the signal pres-
sure connection on the bottom diaphragm
case.
The actuator's direction of action can be re-
versed (see section6.2).
3.2 Signal pressure routing
120cm² version (see Fig.3)
In the "actuator stem extends" version, the
signal pressure is routed through the bottom
signal pressure connection (A35) to the bot-
tom diaphragm chamber and moves the ac-
tuator stem (A3) upward opposing the
spring force.
In the "actuator stem retracts" version, the
signal pressure is routed through the top sig-
nal pressure connection to the top dia-
phragm chamber and moves the actuator
stem (A3) downward opposing the spring
force.

EB 8317 EN 13
Design and principle of operation
A1 Vent plug
A2 Bottom diaphragm case
A3 Actuator stem
A10 Spring
A11 Rod
A12 Bushing
A13 Diaphragm plate
A14 Diaphragm plate
A16 Top diaphragm case
A17 Crossbeam
A18 Diaphragm
A26 Collar nut
A30/
A31 Stem connector clamps
A35 Pneumatic connection
A72 Rod nut
Mounting with crossbeam Mounting without crossbeam
A31
A72
A12
•
•
•
A3
A30
A26
A10
A18
A13
A14
A11
A2
A16
A35
A1
A17
••
•
•
•
•
•
•
•
•
Fig.3: Functional diagram of Type3371 Actuator with 120cm² actuator area

14 EB 8317 EN
Design and principle of operation
A1 Top diaphragm case
A2 Bottom diaphragm case
A4 Diaphragm
A5 Diaphragm plate
A7 Actuator stem
A10 Spring
A15 Collar nut
A20 Hexagon bolt
A21 Hexagon nut
A25 Washer
A27 Compressor
A33 Rod
A40 Radial shaft seal
A41 Wiper ring
A42 Dry bearing
A50 Screw for rod (A51)
A51 Rod
A54 Rod nut
A60 Plate
A61 Pneumatic connection
S Signal pressure
connection (stem retracts)
A61
A10
•
•
•
A1
•
A5
S
•
A2
•
•
A1
A4
A33
•
A7
•
A15
•
A51
•
A60
•A54
•
•
A50
••
A25
A20
•
A21
•
A27
A41
A42
A40
Fig.4: Functional diagram of Type3371 Actuator with 350cm² actuator area

EB 8317 EN 15
Design and principle of operation
350cm² version (see Fig.4)
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.
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.
3.3 Fail-safe action
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.
3.3.1 Version with direction of
action "actuator stem
extends" (FA)
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.
3.3.2 Version with direction of
action "actuator stem
retracts" (FE)
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.
3.4 Mounting types
There are two types of mounting depending
on the valve/actuator combination: mount-
ing using a crossbeam or rods (see Table1).
When the actuator is mounted to the valve
using a crossbeam (Form B, Fig.5), the actu-
ator is fastened to the valve bonnet using a
central nut.
When the actuator is mounted using rods
(Form C, Fig.6), the actuator is connected to
the valve bonnet using rods. In this case, a
crossbeam is not required for mounting the
actuator. A plate keeps the correct distance
between rods.
Both mounting types are described in sec-
tion5.1.

16 EB 8317 EN
Design and principle of operation
Fig.5: FormB: mounting using crossbeam Fig.6: FormC: mounting using rods
Table1: Mounting types (see Fig.5 and Fig.6)
Actuator area 120cm² 350cm²
Travel 15mm 15mm 30mm
Type ... Valve Nominal size DN
3321 15 to 50 FormB –
–
3321 65 to 100 FormC FormC –
3321 100 – – FormC
3323 15 to 50 FormB – –
3323 65 to 80 –FormC –
3323 100 – – FormC
3531 15 to 80 FormB – –
3535 15 to 80 FormB – –

EB 8317 EN 17
Design and principle of operation
3.5 Versions
−Standard version of Type3371
(120cm²)
The housings of Type 3371 Pneumatic
Actuators have an actuator area of
120cm² and are made of die-cast alu-
minum.
−Standard version of Type3371
(350cm²)
The housings of Type3371 Pneumatic
Actuators have an actuator area of
350cm² and are made of sheet steel.
−Version with travel stop
The Type3371 Actuators with 120cm²
actuator area can be tted with a me-
chanically adjustable travel stop. The
travel is reduced by up to 50% in both
directions of action (stem extends or re-
tracts).
The travel stop is not available for
Type3371 (350cm²).
−Version with handwheel
The Type3371 Actuators (120cm²) can
be tted with an additional handwheel.
The handwheel is mounted on the top di-
aphragm case (A1) and is used to adjust
the travel manually.
The handwheel is not available for
Type3371 (350cm²).
3.6 Technical data
The nameplate provides information on the
actuator version (see section2.1).
More information is available in Data Sheet
uT8317.
Note
182
Ø168
Ø280
231
Fig.7: Dimensional drawing of 120cm² version Fig.8: Dimensional drawing of 350cm² version

18 EB 8317 EN
Design and principle of operation
Table2: Technical data for Type3371 Pneumatic Actuator
Actuator area 120cm² 350cm²
Rated travel 15mm 30mm
Fail-safe action
Stem
retracts
(FE)
Stem
retracts
(FE)
Stem
extends
(FA)
Stem
extends
(FA)
Stem
retracts
(FE)
Stem
extends
(FA)
Stem
retracts
(FE)
Stem
extends
(FA)
Bench range in
bar
0.4 to
1.4 1.4 to 2.3 2.1 to 3.3
1.5 to
2.1
2.1 to
2.7
1.5 to
2.7
2.2 to
3.8
Supply pressure See section6.1 for restrictions
Ambient
temperature range –35 to +90°C –35 to +90°C
Dimensions Refer to Fig.7 Refer to Fig.8
Approx. weight 3.3kg 15kg
Compliance
Materials
Actuator housing GD-AlSi10Mg 1.0332
Diaphragm NBR NBR
Actuator stem 1.4305 1.4401/1.4404

EB 8317 EN 19
Measures for preparation
4 Measures for preparation
After receiving the shipment, proceed as fol-
lows:
1. Check the scope of delivery. Compare
the shipment received against the deliv-
ery note.
2. Check the shipment for transportation
damage. Report any damage to
SAMSON and the forwarding agent
(refer to delivery note).
4.1 Unpacking
Do not remove the packaging until immedi-
ately before mounting.
Proceed as follows to lift and mount the actu-
ator:
1. Remove the packaging from the actuator.
2. Dispose of the packaging in accordance
with the valid regulations.
4.2 Transporting and lifting
SAMSON's After-sales Service department
can provide more detailed transport and lift-
ing instructions on request.
4.2.1 Transporting
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.
−The permissible transportation tempera-
ture is between –20 and +65°C.
4.2.2 Lifting
Due to the low service weight, lifting equip-
ment is not required to lift the actuator (e.g.
to mount it onto a valve).
See valve documentation for more informa-
tion on lifting the entire control valve assem-
bly.
Note
Tip
Note

20 EB 8317 EN
Measures for preparation
4.3 Storage
Risk of actuator damage due to improper
storage.
−Observe storage instructions.
−Avoid long storage times.
−Contact SAMSON in case of different stor-
age conditions or long storage periods.
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).
−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.
−The permissible storage temperature is
between –20 and +65°C.
−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.
SAMSON's After-sales Service department
can provide more detailed storage instruc-
tions on request.
NOTICE
!
Note
Tip