Samson 3374 User manual

Translation of original instructions
EB 8331-3 EN
Edition January 2023
Type3374 Electric Actuator
Three-step version

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]).
The mounting and operating instructions for the devices are included
in the scope of delivery. The latest documentation is available on our
website at www.samsongroup.com > Service & Support > Downloads >
Documentation.
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 8331-3 EN

Contents
EB 8331-3 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 ................................................................1-5
1.3 Notes on possible property damage.............................................................1-6
2 Markings on the device ..............................................................................2-1
2.1 Nameplate .................................................................................................2-1
3 Design and principle of operation ...............................................................3-1
3.1 Fail-safe action ...........................................................................................3-1
3.2 Versions .....................................................................................................3-1
3.3 Additional equipment..................................................................................3-2
3.4 Technical data ............................................................................................3-3
3.5 Dimensions.................................................................................................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 the actuator.............................................................................4-1
4.4 Lifting the actuator ......................................................................................4-1
4.5 Storing the actuator.....................................................................................4-2
5 Installation.................................................................................................5-1
5.1 Installation conditions..................................................................................5-1
5.2 Preparation for installation...........................................................................5-2
5.3 Mounting the actuator .................................................................................5-2
5.3.1 Constructionwithintegratedyoke(formB) ....................................................5-2
5.3.2 Constructionwithringnut(formA)...............................................................5-4
5.4 Installing the control valve into the pipeline ...................................................5-7
5.5 Installing additional equipment ....................................................................5-7
5.5.1 Retrottinglimitcontacts ..............................................................................5-7
5.5.2 Installing the resistance transmitters ............................................................5-13
5.6 Electrical connection..................................................................................5-17
6 Start-up .....................................................................................................6-1
6.1 Adjusting the limit contacts ..........................................................................6-1
6.2 Adjusting the resistance transmitter...............................................................6-2
7 Operation..................................................................................................7-1
7.1 Three-step mode .........................................................................................7-1
7.2 Mechanical override ...................................................................................7-1
8 Malfunctions ..............................................................................................8-1
8.1 Emergency action .......................................................................................8-1
9 Servicing....................................................................................................9-1

Contents
EB 8331-3 EN
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Construction with integrated yoke...............................................................11-1
11.2 Construction with ring nut..........................................................................11-2
12 Repairs ....................................................................................................12-1
12.1 Returning the actuator to SAMSON............................................................12-1
13 Disposal...................................................................................................13-1
14 Certicates...............................................................................................14-1
14.1 Information on the UK sales region.............................................................14-1
15 Annex......................................................................................................15-1
15.1 Partsforretrottingandaccessories............................................................15-1
15.2 After-sales service.....................................................................................15-2

EB 8331-3 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
TheType3374ElectricActuatorisdesignedtooperateamountedglobevalveusedin
industrial applications as well as in heating, ventilation and air-conditioning systems. 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applicationsorconditionsotherthanthose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forlimitsandeldsofapplicationaswellaspossibleuses.See
the 'Design and principle of operation' section.
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
−Outdoor use
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 8331-3 EN
Safety instructions and measures
Personal protective equipment
No personal protective equipment is required for the direct handling of the electric actuator.
Work on the control valve may be necessary when mounting or removing the device.
ÎObservetherequirementsforpersonalprotectiveequipmentspeciedinthevalvedocu-
mentation.
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
Upon supply voltage failure, the Type3374 Electric Actuator 1) causes the valve to move to a
certainfail-safeposition.Thefail-safeactionofSAMSONactuatorsisspeciedontheactua-
tor nameplate.
1) Type3374-21/-26/-31/-36
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controlvalvebytheprocessmedium,theoperat-
ing pressure, the signal pressure or by moving parts by taking appropriate precautions. Plant
operatorsandoperatingpersonnelmustobserveallhazardstatements,warningsandcau-
tion notes in these mounting and operating instructions, especially for installation, start-up
and service work.
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 to the operating per-
sonnel and to instruct them in proper operation. Furthermore, operators must ensure that op-
erating personnel or third parties are not exposed to any danger.

EB 8331-3 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speciedhazardstatements,warningsandcautionnotes.Furthermore,operating
personnel must be familiar with the applicable health, safety and accident prevention regula-
tions and comply with them.
Referenced standards, directives and regulations
DeviceswithaCEmarkingfullltherequirementsofthefollowingDirectives:
−2014/30/EU
−2014/35/EU
−2011/65/EU
DeviceswithaUKCAmarkingfullltherequirementsofthefollowingRegulations:
−SI2016No.1091(TheElectromagneticCompatibilityRegulations2016)
−SI2016No.1101(TheElectricalEquipment(Safety)Regulations2016)
−SI2012No.3032(TheRestrictionoftheUseofHazardousSubstancesinElectricaland
Electronic Equipment Regulations 2012)
DeviceswithanEACmarkingfullltherequirementsofthefollowingRegulations:
−TRCU004/2011
−TRCU020/2011
The'Certicates'sectioncontainsthesedeclarationsofconformityandTRCUcerticate.
TheType3374ElectricActuatorisdesignedforuseinlow-voltageinstallations.
ÎFor wiring, maintenance and repair, observe the relevant safety regulations.

1-4 EB 8331-3 EN
Safety instructions and measures
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
−Mounting and operating instructions of the valve on which the electric actuator is mount-
ed, e.g. for SAMSON valves:
uEB5861forType3260Three-wayValve
uEB5868forType3213andType3214GlobeValves
uEB8012forType3241GlobeValve,ANSIandJISversion
uEB8015forType3241GlobeValve,DINversion
uEB8026forType3244Three-wayValve
uEB8113forType3323Three-wayValve
uEB8131forType3531GlobeValveforHeatTransferOil
uEB8135forType3535Three-wayValveforHeatTransferOil
1.1 Notes on possible severe personal injury
DANGER
!
Risk of fatal injury due to electric shock.
ÎBeforeconnectingwiring,performinganyworkonthedeviceoropeningthede-
vice, disconnect the supply voltage and protect it against unintentional reconnec-
tion.
ÎOnly use power interruption devices that can be protected against unintentional re-
connection of the power supply.
ÎDo not remove any covers to perform adjustment work on live parts.
Theelectricactuatorisprotectedagainstspraywater(IP54).
ÎAvoid jets of water.

EB 8331-3 EN 1-5
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Crush hazard arising from moving parts.
The electric actuator contains moving parts (actuator and plug stems), which can injure
handsorngersifinsertedintotheactuator.
ÎDonotinserthandsorngerintotheyokewhilethevalveisinoperation.
ÎDisconnect the supply voltage and protect it against unintentional reconnection be-
fore performing any work on the control valve.
ÎDo not impede the movement of the actuator or plug stem by inserting objects into
their path.
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.

1-6 EB 8331-3 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of damage to the electric actuator due to the supply voltage exceeding the per-
missible tolerances.
TheType3374ElectricActuatorisdesignedforuseaccordingtoregulationsfor
low-voltage installations.
ÎObserve the permissible tolerances of the supply voltage.
Risk of actuator damage due to excessively high tightening torques.
ObservethespeciedtorqueswhentighteningthemountingpartsofType3374Electric
Actuators. Excessive tightening torques lead to parts wearing out more quickly.
ÎObservethespeciedtighteningtorques.
Risk of damage to the electric actuator due to incorrect operation of the manual over-
ride.
The actuator stem of the electric actuator can be adjusted manually.
ÎDo not operate the manual override while the actuator is in operation. Only operate
themanualoverrideofactuatorswithoutfail-safeactioninthede-energizedstate.
Risk of damage to the electric actuator due to incorrect connection of the voltage.
The electric actuator has terminals to retract the stem (eL terminal) and to extend the
stem (aL terminal).
ÎDo not apply a voltage to eL and aL at the same time.

EB 8331-3 EN 2-1
Markings on the device
2 Markings on the device
2.1 Nameplate
The nameplate shown was up to date at the time of publication of this document. The name-
plate on the device may differ from the one shown.
3374-21
2500 N
2500 N
15/30 mm
25 VA / 17 W
000000000.00
09/2022
*123456789*
:
:
:
:
:
:
Mechanical
limit contacts
1F155
14
13
11
10
9
8
7
6
5
3
2
1
12
4
15
1Type designation
2Material number
3Serial number
4Date of manufacture
5Data Matrix code
6Supplyvoltage;powerlinefrequency
7Power consumption
8Rated travel
9Stroking speed
10 Thrust (actuator stem retracts)
11 Thrust (actuator stem extends)
12 Fail-safe action
Retracts
or
Extends
13 Additional electrical equipment
Mechanical limit contacts
Resistance transmitter
14 TestingaccordingtoDINEN14597
15 Other mark of conformity

2-2 EB 8331-3 EN

EB 8331-3 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
TheType3374ElectricActuatorisusedin
industrial plants as well as in heating, venti-
lation and air-conditioning systems.
The actuator is a linear actuator which is
controlled by a three-step signal. It is suitable
forform-tattachmenttovariousSAMSON
valve series, depending on the version with
or without fail-safe action.
Principle of operation
The synchronous motor is switched off by
torque switches in the end positions and in
case of overload. The force of the motor is
transmitted to the actuator stem over gearing
and ball screw drive.
3.1 Fail-safe action
TheType3374ElectricActuatorisavailable
with or without fail-safe action.
Type 3374-2x and Type 3374-3x Actuators
are able to perform a fail-safe action and
contain a spring assembly and an electro-
magnet. The actuator is moved by the force
of the spring to the fail-safe position when
theelectromagnetisde-energized.
The direction of action depends on the actu-
ator version and cannot be reversed.
Testing according to DINEN14597
TheType3374ElectricActuatorwithfail-
safe action "actuator stem extends" is tested
bytheGermantechnicalsurveillanceassoci-
ationTÜVaccordingtoDINEN14597in
combination with different SAMSON valves
(the register number is available on request).
3.2 Versions
TheType3374Actuatorisoptionallyavail-
able with either integrated yoke (see
Fig.3-1)orusinganM30x1.5ringnut(see
Fig.3-2)includingthenecessarystemcon-
necting parts.
Fig.3-1: Construction with integrated yoke
(formB)
Fig.3-2: Construction for mounting with ring
nut (formA)

3-2 EB 8331-3 EN
Design and principle of operation
3.3 Additional equipment
The actuator can be equipped with mechani-
cal limit contacts or with resistance transmit-
terstoinuencethetasksofcontrolequip-
ment.
Mechanical limit contacts
Optionally, the actuator can be equipped
with two limit contacts. They consist of two
changeover switches. Their switching posi-
tions are changed independently from one
another by continuously adjustable cam
disks.
Thelimitcontactsaresuitableforretrotting.
The installation and adjustment of the me-
chanical limit contacts is described in the 'In-
stallation' section.
Resistance transmitter
Optionally, the actuator can be equipped
with resistance transmitters. They are linked
to the gear and produce a resistance signal
betweenapprox.0and1000Ω(usable
range0to900Ω)proportionaltothevalve
travel. They can be used to process the posi-
tion of the actuator stem. The resistance
transmittersaresuitableforretrotting.The
installation and adjustment of the mechani-
cal limit contacts is described in the 'Installa-
tion' section.

EB 8331-3 EN 3-3
Design and principle of operation
3.4 Technical data
Table 3-1: Technical data · Type 3374
Type3374 -10 -11 -15 -17 -21 -26 -31 -36
Version with Yoke Ring nut Yoke Ring
nut Yoke Ring
nut
Fail-safe action Without Extends Retracts
Rated travel mm 30 15 30 15
Stroking speed
Standard mm/s 0.125 0.1 0.125
Fast mm/s 0.25 – 0.25
In the event of
fail-safe action mm/s – 1.25
Transit time for rated travel
Standard s 240 120 240 300 120 120 120 120
Fast s 120 60 120 – 60 60 60 60
In the event of fail-safe
action s – – – – 12 12 12 12
Thrust Retracts 2.5kN 5kN 0.5kN
Extends 2.5kN 5kN 2kN
Manual override With hex wrench With hex wrench only possible
when supply voltage is
connected (see the 'Operation'
section). Adjustment not possible
after fail-safe action has been
triggered.
Motor switch-off Torque switches
Duty type S1-100%accordingtoEN60034-1
Electrical connection
Supply voltage V 230,+10/–15%
24,+10/–15%
Power line frequency Hz 50 or 60 50 50 or 60
Power consumption VA 7.5/13 1) 13 10.5/16 1)

3-4 EB 8331-3 EN
Design and principle of operation
Type3374 -10 -11 -15 -17 -21 -26 -31 -36
Permissible temperature ranges2)
Temperature
ranges2) Ambient 5to60°C
Storage –25to+70°C
Materials Housingandcover:Plastic(glass-berreinforcedPPO)
Weight
kg (approx.)
3.2 3.2 3.3 3.3 3.9 4.0 3.5 3.6
Safety
Degree of protection IP54acc.toEN60529,(IP65withthreecableglands3))
Suspended mounting position not approved
Class of protection IIaccordingtoEN61140
Device safety AccordingtoEN61010-1
Noise immunity AccordingtoEN61000-6-2andEN61326-1
Noise emission AccordingtoEN61000-6-3andEN61326-1
Conformity
Additional equipment
Limit contacts Twoadjustablelimitcontactswithchangeoverswitches;230V/1A
· Without contact protection
Resistance transmitters Tworesistancetransmitters;0to1000Ω±15%,max.200mW
usablerangeapprox.0to900Ω
1) Actuator with faster motor
2) The permissible medium temperature depends on the valve on which the electric actuator is
mounted. The limits in the valve documentation apply.
3) CableglandsM20x1.5withmetalnutSW23/24

EB 8331-3 EN 3-5
Design and principle of operation
3.5 Dimensions
Types3374-10/-11/-21/-31
57
194
50 1) h
298
120
120
h1
1) 220
h
57
193
146
146
10
16
hx
hx
1) When the actuator stem is fully extended
Type 3374 Dimension h Dimension hx
-10 30
≥60
-11 15
-21 15
-31 15
Fig.3-3: Dimensions in mm · Type3374, version with integrated yoke (formB)
The dimension hxindicates the minimum clearance required to be able to operate the
actuator. Sufcient clearance must be available to facilitate wiring and operation. We
recommend a minimum clearance of 600mm.
Note

3-6 EB 8331-3 EN
Design and principle of operation
Types3374-15/-17/-26/-36
57
194
50 1) h
298
120
120
h1
1) 220
h
57
193
146
146
10
16
hx
hx
1) When actuator stem extended
Type3374 Dimension h Dimension h1Dimension hx
-15 30 90
≥100
-17
-26 15 75
-36
Fig.3-4: Dimensions in mm · Type3374, version with ring nut (form A)
The dimension hxindicates the minimum clearance required to be able to operate the actua-
tor. We recommend an even greater clearance of at least 600mm to facilitate wiring and
operation. We recommend a minimum clearance of 600mm.
Note

EB 8331-3 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. Compare the shipment received with the
delivery note.
2. Check the shipment for transportation
damage. Report any damage to
SAMSON and the forwarding agent
(refer to delivery note).
4.2 Removing the packaging
from the actuator
Do not remove the packaging until immedi-
ately before mounting and start-up.
1. Remove the packaging from the electric
actuator.
2. Check scope of delivery (see Fig. 4-1).
3. Dispose of the packaging in accordance
with the valid regulations.
Note
1x Type3374-xxElectricActuator
1x DocumentIP8331-3
(Important Product Information)
forTypes3374-10,-11,-21,-31:
1x Accessory 1400-6817, consisting of
2x Stem connector for
Ø10mmstem
2x M5 hex bolt
2x M5 hex nut
forTypes3374-15,-17,-26,-36:
1x Accessory0900-2679,consistingof
2x Stem connector for
Ø16mmstem
2x M6 screw
1x M30x1.5 ring nut
Fig. 4-1: Scope of delivery
4.3 Transporting the actuator
−Protect the actuator against external in-
uences(e.g.impact).
−Protect the actuator against moisture and
dirt.
−Observe the permissible transportation
temperatureof–25to+70°C.
4.4 Lifting the actuator
Due to the low service weight, lifting equip-
ment is not required to lift the electric actua-
tor.

4-2 EB 8331-3 EN
Shipment and on-site transport
4.5 Storing the actuator
Risk of electric actuator damage due to
improper storage.
ÎObserve the storage instructions.
ÎAvoid long storage times.
ÎContact SAMSON in case of different
storage conditions or longer storage
times.
We recommend regularly checking the elec-
tric actuator and the prevailing storage con-
ditions during long storage periods.
Storage instructions
−Protect the electric actuator against exter-
nalinuences(e.g.impact).
−Protect the electric actuator against mois-
ture and dirt.
−Make sure that the ambient air is free of
acids or other corrosive media.
−Observe the permissible storage tem-
peraturefrom–25to+70°C.
−Do not place any objects on the electric
actuator.
NOTICE
!
Note