Samson 3274 Service manual

Mounting and
Operating Instructions
EB 8340 EN
Translation of original instructions
Edition October 2016
Type 3274 Electrohydraulic Actuator

2 EB 8340 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 8340 EN 3
1 General safety instructions.............................................................................4
2 Technical data ...............................................................................................5
3 Design and principle of operation ..................................................................7
3.1 Versions........................................................................................................7
3.2 Principle of operation.....................................................................................8
3.3 Accessories ...................................................................................................8
3.3.1 Positioner ....................................................................................................10
3.3.2 Position transmitter.......................................................................................10
3.3.3 Resistance transmitters..................................................................................10
3.3.4 Mechanical limit contacts..............................................................................10
3.3.5 Priority circuit ..............................................................................................10
3.3.6 Heating.......................................................................................................10
4 Installation..................................................................................................11
4.1 Mounting position........................................................................................11
4.2 Assembling valve and actuator .....................................................................12
5 Electrical connections...................................................................................14
6 Manual operation of actuator ......................................................................18
6.1 Version with electric override ........................................................................18
6.2 Version with mechanical override..................................................................20
7 Operation...................................................................................................21
7.1 Positioners...................................................................................................21
7.1.1 SW1: Priority circuit.....................................................................................22
7.1.2 SW2: Direction of action ..............................................................................22
7.1.3 SW3/SW4: Position feedback signal.............................................................22
7.1.4 Calibrating the positioner for direction of action increasing/increasing (>>) or in-
creasing/decreasing (<>) .............................................................................23
7.1.5 Using the positioner as a position transmitter..................................................25
7.2 Calibrating the position transmitter................................................................26
7.3 Adjusting the resistance transmitters ..............................................................27
7.4 Adjusting the limit contacts ...........................................................................28
8 Dimensions in mm.......................................................................................29
8.1 Actuator with mechanical override ................................................................29
8.2 Actuator with electric override.......................................................................30

4 EB 8340 EN
General safety instructions
1 General safety instructions
For your own safety, follow these instructions concerning the mounting, start-up, and opera-
tion of the device:
−The device is to be mounted, started up or operated only by trained and experienced
personnel familiar with the product. 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 dangers due to their specialized training, their
knowledge and experience as well as their knowledge of the applicable standards.
−Any hazards that could be caused in the valve by the process medium and the operating
pressure or by moving parts are to be prevented by taking appropriate precautions.
−The device is designed for use in low voltage installations. For wiring and maintenance,
you are required to observe the relevant safety regulations. Only use protective equip-
ment that can be protected against unintentional reconnection of the power supply.
−Before wiring the actuator, disconnect it from the power supply.
To avoid damage to any equipment, the following also applies:
−Proper shipping and storage are assumed.
Devices with a CE marking fulll the requirements of the Directive 2014/34/EU and the
Directive 2014/30/EU. The EU declaration of conformity is included at the end of these
instructions.
Note

EB 8340 EN 5
Technical data
2 Technical data
Actuator Type3274 -11 -12 -13 -14 -15 -16 -17 -18 -21 -22 -23
Manual override Electric Mechanical Electric
Fail-safe action Without Without With
Direction of action: stem
retracts – – •
Direction of action: stem
extends – – • •
Rated travel 15 or 30mm
Transit time for rated travel 60s with 15mm travel · 120s with 30mm travel
Faster motor 1): 30s with 15mm travel · 60s with 30mm travel
Stroking speed [mm/s] 0.25; faster motor 1): 0.5
Stroking speed for fail-safe action [mm/s]
Standard — — 1 1 1.3
Optional 3.3 3.3 5
Weight 12kg 15kg 12kg
Power supply 230V, 110V and 24V, 50 or 60Hz (±10%)
Power consumption with
power supply 24V, 110V, 230V/50Hz: 90VA
24V, 110V, 230V/60Hz: 110VA
110V, 230V/50Hz with faster motor: 150VA
110V, 230V/60Hz with faster motor: 185VA
Positioner: 3VA
Permissible ambient
temperature 2) –10 to +60°C
Extended range (with heating resistor): –40 to +60°C
Perm. storage temperature –25 to +70°C
Degree of protection IP 65 according to EN60529
Electromagnetic
compatibility According to EN61326-1, EN61000-6-2, EN61000-6-3
Compliance ·
Thrust in N
Travel:
15mm
Retracts 2100 500 4300 500 2100 500 4300 500 2100 1800 500
Extends 2000 3400 4300 7700 2000 3400 4300 7700 2000 2300 3400
Travel:
30mm
Retracts 2100 500 4300 500 2100 500 4300 500 2100 1800 500
Extends 1800 3000 4300 7300 1800 3000 4300 7300 1800 2100 3000
1) Not for actuators with 24V power supply
2) To ensure that the heating can be activated below –10°C, the power supply must be applied to the actuator
continuously (at least two hours before start-up in temperatures within the specied range).

6 EB 8340 EN
Technical data
Accessories
Positioner Same power supply as actuator
Input signal 0/4 to 20mA, (Ri = 50Ω) · 0/2 to 10VDC (Ri = 10Ω)
Zero shift 0 to 100%
Change of range 30 to 100%
Position feedback 0/4 to 20mA, RB ≤ 200Ω · 0/2 to 10VDC, RB ≤ 2kΩ
Hysteresis Approx. 3%
Resistance transmitters 0 to 1000Ω, 0 to 200Ω, 0 to 100Ω, 0 to 275Ω, 0 to 138Ω;
(useable range approx. 80% of nominal value) perm. load 0.5W
Mechanical limit contacts Maximum three separately adjustable changeover switches, max. 250VAC, 5A
Inductive limit contacts SJ2-N proximity switch (NC contact only)
Control circuit Values corresponding to isolating switch amplier used
Heating Approx. 45W · ON: < –10°C, OFF: > 0°C through installed thermostats
Materials
Housing and cover Die-cast aluminum
Cylinder Hydraulic cylinder tube
Piston Steel/NBR combination
Piston rod C45, hard chrome-plated
Actuator stem 1.4104
Hydraulic oil Special HLP, silicone-free
Fine-wire fuses (see page14)
ÎContact SAMSON's After-sales Service department (aftersalesser[email protected]) if you
require them.
Actuators with 120s transit time at 30mm travel
Power supply Type of ne-wire fuse
230 V, 50/60 Hz T1L (1A slow-acting)
Actuators with 60s transit time at 30mm travel (with faster motor)
Power supply Type of ne-wire fuse
230 V, 50/60 Hz T1.25 (1.25 A slow-acting)
110 V, 50/60 Hz T1.25 (1.25 A slow-acting)
24 V, 50/60 Hz T6.3 (6.3 A slow-acting)

EB 8340 EN 7
Design and principle of operation
3 Design and principle of oper-
ation
The electrohydraulic actuator is used to posi-
tion Series240, 250, and 280 Control
Valves.
The actuator is fastened to the valve bonnet
with a ring nut. The actuator and plug stems
are fastened together by a stem connector.
The actuator mainly consists of the actuator
housing, motor with oil pump, and cylinder
housing with piston.
Pilot valves regulate the ow of oil to and
from the piston. The actuator is equipped
with compression springs which determine
the positioning forces. Actuator versions with
spring mechanism also serve to move valve
to the fail-safe position "actuator stem re-
tracts" or "actuator stem extends" in the
event of a power supply failure.
3.1 Versions
The following versions (see technical data on
page5 for details) are available:
With electric override:
Manual override with two pushbuttons
−Type3274-11
−Type3274-12
−Type3274-13
−Type3274-14
With mechanical override:
Mechanical override implemented using an
Allen key (width across ats 24mm) at the
additional gear housing
−Type3274-15
−Type3274-16
−Type3274-17
−Type3274-18
Versions with fail-safe action and with
electric override:
−Type3274-21
−Type3274-22
−Type3274-23
Testing according to DINEN14597
The Type3274-21 and Type3274-23 Actu-
ators are tested by the German technical
surveillance association (TÜV) according to
DINEN14597 in combination with various
SAMSON valves (registration number on re-
quest).

8 EB 8340 EN
Design and principle of operation
3.2 Principle of operation
ÎRefer to Fig.1
The pressure-tight actuator housing (1),
which also serves as the oil reservoir, con-
tains the cylinder housing (2), cylinder (5.1)
and piston (5.2), motor (6.1), pump (6.2),
and solenoid pilot valves (6.4).
The oil pump (6.2) driven by the motor (6.1)
feeds compressed oil to the corresponding
cylinder chamber over the check valve (6.3)
and pilot valve (6.4). The solenoid valves are
closed in the de-energized state and open
when a controller output signal is applied.
When an end position is reached or when
the thrust is too high due to external forces,
the motor is switched off.
Depending on the version, the actuators
have no compression springs or are
equipped with one or two compression
springs (5.7, 5.8). The motor in Types3274-
11, -12, -15, -16 as well as -21 to -23 can
only move the stem in one direction. The
stem is moved by spring force in the other
direction.
Actuators with electric override have two
pushbuttons to extend or retract the actuator
stem.
The actuators with mechanical override have
an additional gear housing. An Allen key
must be inserted to activate the override
function. In combination with a release but-
ton on the top of the actuator housing, the
actuator stem can be extended or retracted.
Versions with fail-safe action have a
spring-return mechanism and an additional
safety solenoid valve which opens when the
power supply is interrupted, reducing the
pressure on the cylinder chamber. The spring
assembly moves the valve plug to the fail-
safe position. The direction of action (actua-
tor stem extends or retracts) depends on how
the springs are arranged in the actuator.
Risk of actuator damage through opening
the device.
Do not remove the housing cover.
3.3 Accessories
The actuator can be tted with a various
combination of accessories.
Table1: Combination of accessories
Accessories
Positioner • •
Position transmitter • •
Resistance transmitter 11) ••••••••
Resistance transmitter 2 ••••••
Mechanical limit contact 1 • •
Mechanical limit contact 2 •••••
Mechanical limit contact 3 •••••
Inductive limit contact 1 •••••
Inductive limit contact 2 •••••
All accessories are housed in the terminal
box (3). To control switching and indicating
components, the travel of the actuator stem,
which is picked up at the shaft, is converted
into a rotary motion by a rack-and-pinion
gear. Accessories can be retrotted. Table1
on page22 shows the maximum amount
of accessories that can be tted.
NOTICE
!

EB 8340 EN 9
Design and principle of operation
1 Actuator housing with oil reservoir
2 Cylinder housing
3 Terminal box
5.1 Cylinder
5.2 Piston
5.4 Stem connector
5.6 Actuator stem
5.7 Compression spring
5.8 Compression spring
6.1 Motor
6.2 Gear pump
6.3 Check valve
6.4 Pilot valve
1
6.4
6.3
6.2
6.1
5.1
2
5.4
5.6
3
5.2
5.7
5.8
Fig.1: Functional diagram

10 EB 8340 EN
Design and principle of operation
3.3.1 Positioner
The positioner compares the 0/4 to 20mA
or 0/2 to 10V control signal issued by the
controller with the position of a potentiome-
ter which is proportional to the travel. This
results in an output signal of 0/4 to 20mA
or 0/2 to 10V.
3.3.2 Position transmitter
In the version with three-step control, a po-
tentiometer (0 to 1000Ω) is used to issue a
0/4 to 20mA or 0/2 to 10V output signal,
which is proportional to the travel.
3.3.3 Resistance transmitters
An actuator can be equipped with two resis-
tance transmitters. A segment gear is driven
by a shaft. An easily adjustable transmission
mechanism including a twin pinion ensures
that the angle of rotation remains the same
for rated travels of 15 and 30mm.
3.3.4 Mechanical limit con-
tacts
The actuators can be tted with a maximum
of three mechanical changeover switches,
which are actuated by continuously adjust-
able cam disks. The motor is switched off by
force-dependent xed switches in the actua-
tor housing (1).
Actuators with fail-safe action only have one
force-dependent switch since these actuators
are only moved in the other direction by the
force of the springs (5.7 and 5.8).
3.3.5 Priority circuit
The version with positioner is tted with a
priority circuit which is activated at terminals
82 and 83 (see section7.1.1).
3.3.6 Heating
For low ambient temperatures, the actuator
can be delivered with heating with two heat-
ing resistors in the oil reservoir. The heating
is activated by thermostats when the oil tem-
perature falls below –10°C and deactivated
again when the oil reaches a temperature of
0°C. It is connected internally to the power
supply and cannot be retrotted.
To ensure that the heating can be activated
at temperatures below 0°C, the power sup-
ply must be applied to the actuator continu-
ously (at least two hours before start-up in
temperatures within the specied range).
Note

EB 8340 EN 11
Installation
4 Installation
4.1 Mounting position
The actuator can be installed in any position. Restriction apply to actuators with mechanical
override and/or integrated heating: see Fig.2.
Any mounting
position possible: Restriction apply to actuators with mechanical override (Type3274-
15/-16/-17/-18) and/or
integrated heating:
Fig.2: Permissible/impermissible mounting positions of Type3274 Actuator

12 EB 8340 EN
Installation
The mounting position of the valve deter-
mines how the actuator is mounted (see as-
sociated control valve documentation).
We recommend installing valves in sizes
larger than DN100 upright with the actua-
tor on top to facilitate valve maintenance.
ÎObserve the clearance required to re-
move the cover or entire actuator (see
dimensional drawings in section8).
4.2 Assembling valve and ac-
tuator
Proceed as follows if the valve and actuator
have not been assembled by SAMSON, pro-
ceed as follows (Fig.3):
ÎCheck whether the actuator stem is re-
tracted.
ÎPerform electrical connections of actuator
with electric override (section5). Discon-
nect isolating terminal 81 and retract the
actuator stem electrically (section6.1).
ÎFor versions with mechanical override,
press the button on the top of the hous-
ing. Use an Allen key to operate the
rack-and-pinion gear to retract the actu-
ator stem.
ÎFor versions with "actuator stem extends"
fail-safe action, the power supply must
remain connected to L and N while
mounting the actuator to keep the actua-
tor stem in the top end position.
DN15 to 80 (Series240)
1. Replace the stem connector nut (9.3, with
an external Ø10mm) on the valve plug
stem (9.5) with a Ø16mm nut (order no.
0250-0674).
2. Turn the stem connector nut (9.3) and
adjust the dimension x to 75mm with a
closed valve and tighten lock nut (9.4).
3. Place the actuator onto the valve bonnet
and secure using the ring nut (8.1).
4. Push the plug stem (9.5) upward. Con-
nect the stem connector nut (9.3) and ac-
tuator stem (5.6) using the stem connec-
tor clamps (8.2) and fasten together us-
ing the screws.
5. Move the valve to the end position and
align the travel indicator scale (9.2) with
the tip of the stem connector.
DN100 to 150 (Series240, 250, and 280,
KVS 40 to 160)
1. Check dimension x = 90mm. If neces-
sary, readjust by turning the stem con-
nector nut (9.3).
2. Place actuator onto the valve bonnet and
secure using the ring nut (8.1).
3. Fasten the stem connector nut (9.3) and
actuator stem (5.6) to the stem connector
clamps (8.2).
4. Move the actuator stem to the lower end
position. Align the travel indicator scale
(9.2) with the tip of the stem connector
(8.2) and screw tight.
Note
Tip

EB 8340 EN 13
Installation
8 Actuator
8.1 Ring nut
5.6 Actuator stem
8.2 Stem connector
9.1 Valve bonnet
9.2 Travel indicator scale
9.3 Stem connector nut
9.4 Lock nut
9.5 Plug stem
8
8.1
5.6
8.2
9.3
9.4
9.2
9.5
9.1
x
Fig.3: Mounting on the actuator

14 EB 8340 EN
Electrical connections
5 Electrical connections
Risk of electric shock.
−Upon installation of the electric cables, you
are required to observe the regulations
concerning low-voltage installations ac-
cording to DINVDE0100 as well as the
regulations of your local power supplier.
−Only use a suitable power supply which
guarantees that no dangerous voltages
reach the device in normal operation and
in the event of a fault in the system or any
other system parts.
−Connect the actuator to the electrical net-
work only after the power supply is rst
switched off. Make sure the power cannot
be switched on unintentionally.
Special motor electronics ensures that the
contacts of the controller's output relay (e.g.
for three-step control) are protected and only
loaded with relatively low control capacities
when the actuator is wired according to the
circuit diagrams.
The power switching is performed by a
TRIAC and a relay in the motor electronics.
How to proceed:
ÎUnscrew the side housing cover. Guide
the cables through the cable glands on
the housing to the terminals and connect
them (see Fig.4 to Fig.6 or circuit dia-
gram stuck inside the housing cover).
If required, two additional cable glands can
be mounted after carefully knocking out the
blanking plugs.
ÎConnect the grounding conductor to the
separate PE terminal on the inside hous-
ing wall.
Accessories
The wiring diagrams (Fig.4 to Fig.6) apply
to the accessories as well.
ÎDo not connect the limit contacts to the
terminal block, but to a separate screw
terminal.
For the version with positioner (Fig.5) and
position transmitter (Fig.6), output signals,
which are proportional to the valve travel,
can be provided at the terminals 31, 32, 33
to be used for position feedback (signal in-
creases as the actuator stem retracts).
ÎJumper the terminals 31 and 32 when
the voltage output is used for position
feedback.
Fuse protection
A holder with a ne-wire fuse (see
page19, Fig.7, item 1) on the motor
electronics board protects the actuator and
contacts of the external controller.
DANGER
!
Note

EB 8340 EN 15
Electrical connections
NLaL eL a43 e53 81 1.311.32 1.33 2.312.32 2.33
eaae
"e" "a"
1
2
4
MF
F
e
a
PE
NL
3274-11...-18,-21,-23 3274-13,-14,-17,-18,-22
ϑ
ÎA controller output which issues the eL and
aL signals must only be supplied over
terminal 81 (internal power supply of the
actuator).
Retracts Extends
Heating resistor
Controller
Safety interlock circuit for
Type3274-2x (external
wiring)
Fig.4: Electrical connection for three-step control

16 EB 8340 EN
Electrical connections
MF
F
e
a
NLaL eL a43 e53 81
82 83 12 11 13 32 31 33 2.312.32 2.33
1
2
4
ae
"e" "a"
PE
NL
-+-+
-+-+
3274-11...-18,-21,-23 3274-13,-14,-17,-18,-22
(0)4...20 mA (0)4...20 mA
(0)2...10V (0)2...10V
Retracts Extends
Heating resistor
Priority circuit
White
Green
Brown
Jumper required with 0/2 to
10V position feedback
Input
control
signal
Output
(position feedback)
Safety interlock circuit
for Type3274-2x
(external wiring)
Fig.5: Electrical connection for version with positioner

EB 8340 EN 17
Electrical connections
MF
F
e
a
NLaL eL a43 e53 81
82 83 12 11 13 32 31 33 2.312.32 2.33
1
2
4
ae
"e" "a"
PE NL
-+
-+
3274-11...-18,-21,-23 3274-13,-14,-17,-18,-22
(0)4...20 mA
(0)2...10V
Heating resistor
Controller
Retracts Extends
Position feedback
Safety interlock circuit
for Type3274-2x
(external wiring) ÎA controller output which issues the eL and
aL signals must only be supplied over
terminal 81 (internal power supply of the
actuator).
Jumper required with
0/2 to 10V position
feedback
Fig.6: Electrical connection for three-step version with position transmitter

18 EB 8340 EN
Manual operation of actuator
6 Manual operation of actuator
6.1 Version with electric over-
ride
Types 3274-11 to -14 and -22, -23
The actuator stem can be retracted or ex-
tended by pressing one of the two pushbut-
tons located on the side housing cover. In
this way, the attached valve can be brought
into the required position.
After releasing the button, the actuator fol-
lows the control signal of the controller
again.
ÎIf the priority of the control signal (e.g.
upon start-up of the plant) is to be inter-
rupted and the control valve is to remain
in a certain position, disconnect the iso-
lating terminal 81 (Fig.7).
To do this, proceed as follows:
1. Switch off the power supply.
2. Unscrew the two fastening screws and
remove the side housing cover.
3. Position a screwdriver at the isolating ter-
minal 81 underneath the release button
and lever up the button until it engages
(the red marking pin is hidden).
4. Mount cover again.
5. Reconnect the power supply.
The control signal is now interrupted and the
valve can be moved to the desired position
by using the two IN and OUT pushbuttons.
The valve will remains in the position the
valve is moved to.
If the controller signal is to have priority
again, proceed as follow:
1. Switch off the power supply and remove
the cover.
2. Firmly press down the release button un-
til it engages (the red marking pin reap-
pears).
3. Mount cover again and reconnect the
power supply.

EB 8340 EN 19
Manual operation of actuator
1
2
3
4
5
6
7
8
13
12
11
10
9
1 Fuse
2 Motor electronics
3 Adjuster for version with positioner
4 Gear segment
5 Slide rod
6 Release button
7 Marking pin
8 Isolating terminal
9 Pushbutton (extend the actuator
stem)
10 Pushbutton (retract the actuator
stem)
11 Resistance transmitter
12 Limit contact(s)
13 Slider switch for version with
positioner
1
2
3
4
5
6
7
8
13
12
11
10
9
Red marking pin
Disconnect
isolating
terminal
Connect isolat-
ing terminal
Isolating terminal
Release button
Fig.7: Terminal box with adjusters

20 EB 8340 EN
Manual operation of actuator
6.2 Version with mechanical
override
1. Press the black release button at the front
of the housing.
2. Insert a hexagon wrench (width across
ats 24) into the shaft end protruding
from the housing to move the rack-and-
pinion gear until the require actuator
stem position has been reached.
As soon as the button is released, the actua-
tor reacts again to the controller signal.
If the valve is to remain in the manually de-
ned position, disconnect the isolating termi-
nal 81 as described in section6.1.
100%
0%
4 20 m
A
12
420 m
A
100%
0%
< >>>
< >>>
Actuator stem
retracted
Actuator stem
extended
Split-range operation
Input signal
Travel
Dead band
Fig.8: Characteristics