Samson Type 5824 Service manual

Electric Actuators
Type 5824 without fail-safe action
Type 5825 with fail-safe action
Fig. 1 · Type 5824 Actuator
Mounting and
Operating Instructions
EB 5824 EN
Edition July 2008

Contents Page
1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 4
1.1 Additional electrical equipment . . . . . . . . . . . . . . . . . . . . . 5
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Attachment to valve . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Type 5824 Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Force-locking attachment . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.2 Form-fit attachment . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Type 5825 Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1 Force-locking attachment . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.2 Form-fit attachment . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Travel indicator scale . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Operation and settings . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Changing the travel position . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Setting additional equipment. . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Limit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.2 Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.3 Positioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.4 Priority circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Dimensions in mm . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2EB 5824 EN
Contents

EB 5824 EN 3
Safety instructions
4
The actuators may only be mounted, started up or operated by trained and
qualified personnel familiar with the product.
According to these instructions, trained personnel refers to individuals who
are able to judge the work they assigned to and recognize possible dangers
due to their specialized training, their knowledge and experience as well as
their knowledge of the applicable standards.
4
Any hazards which could be caused in the mounted valve by the process
medium, the operating pressure, the signal pressure or by moving parts are
to be prevented by means of the appropriate measures.
4
Proper shipping and appropriate storage of the actuator are assumed.
4
The electric actuators have been designed for use in electrical power
installations. For wiring and maintenance, you are required to observe the
relevant safety regulations. Only use power interruption devices which are
protected against unintentional reconnection of the power supply.
4
Note! The electric actuators fulfill the requirements of the directives
2004/108/EC and 2006/95/EC. The declaration of conformity is availa-
ble on request.

1 Design and principle of
operation
The electric actuators basically consist of a
reversible synchronous motor and a mainte-
nance-free gear in a plastic housing. A cou-
pling nut (4) provides a force-locking con-
nection between the actuator and the plug
stem of the valve. For form-fit attachment, a
stem connector is used.
Type 5824 without fail-safe action
The rotary motion of the actuator motor is
transmitted to the actuator stem (3) and the
plug stem of the connected valve over a
crank disk.
When the final positions are reached or in
case of overload, the motor is switched off
by torque-dependent switches (10).
When the actuator stem retracts in actuators
with force-locking connection, the plug stem
follows the movement of the spring installed
in the valve, causing it to retract.
The valve can be manually moved to the re-
quired position with the handwheel (2).
Type 5825 with fail-safe action
The actuators with fail-safe action largely
comply with the Type 5824 illustrated in
Fig. 2. In addition, they contain a spring
mechanism (8) and an electromagnet.
When the control voltage at the electromag-
net is interrupted, the actuator moves to
fail-safe position because the electromagnet
voltage drops, causing the coupling be-
tween gear and actuator motor to
disengage. The actuator stem is completely
moved in the direction OUT or IN by the
spring mechanism.
4EB 5824 EN
Design and principle of operation
Fig. 2 · Type 5824/5825 Actuator (front cover open), with force-locking attachment to the valve
Caution!
Do not open the back housing cover!
1 Housing
1.1 Front cover
1.2 Cable entry
2 Handwheel,
Type 5824 only
2.1 Actuating shaft
3 Actuator stem
4 Coupling nut
5 Cam disk
6 Limit switch
7.1 Adjuster for limit contact
7.2 Adjuster for limit contact
8 Spring mechanism,
Type 5825 only
9 Scale for travel indication
9.1 Driving pin
10 Torque switch
OUT
IN

A connected globe valve is moved to the fi-
nal position (valve CLOSED) with the
fail-safe action “Actuator stem extends”.
Caution!
Do not use the magnet for control tasks.
In Type 5825, there is no handwheel (2) on
the housing cover. Manual override is possi-
ble, after removing the front cover, using a
4 mm Allen key.
Typetesting
The Type 5825 Electric Actuators with
fail-safe action “Actuator stem extends” in
the force-locking version are typetested by
the German Technical Inspectorate (TÜV)
according to DIN 14597 in conjunction with
various SAMSON valves. The register num-
ber is available on request.
1.1 Additional electrical
equipment
The actuators can be equipped with a
positioner, if required. In addition, all actua-
tors can be equipped with two overridable
limit switches. The three-point stepping actu-
ator version can optionally be delivered with
a potentiometer.
Electric positioner
24 V actuators can optionally be fitted with
a positioner.
Positioners compare the 0 (2) to 10 V or
4 (0) to 20 mA signal issued by the electric
control equipment with the position of the
potentiometer, which is proportional to
travel, and issue a three-point stepping out-
put signal to control the synchronous motor.
The positioner is suitable for normal and
split-range operation. The characteristic is
reversible (increasing >> or decreasing <>).
A 0 to 10 V signal can be taken at terminals
32 and 33 for position feedback.
Potentiometer
The potentiometer is linked to the gearing
and provides a resistance signal between 0
to approx. 1000 Ωin proportion to the
travel. The resistance between approx. 0 to
800 Ωcan be used for feedback of the valve
travel.
Limit switches
The limit switches are activated by two cam
disks. The limit switches cannot be retrofit-
ted.
Priority circuit
The positioner version in conjunction with
limit switches can optionally be fitted with a
priority circuit (terminals 82 and 83).
EB 5824 EN 5
Design and principle of operation

1.2 Technical data
6EB 5824 EN
Design and principle of operation
Actuator Type 5824 5825
-10 -12 -13 -20 -23 -30 -10 -13 -20 -23 -30 -15 -25 -35
Fail-safe action – Stem extends Stem retracts
Rated travel mm 6 1) 6 6 12 12 15 6 1) 6 1212156
1) 12 15
Transit time f. rated travel s 35 1) 18 18 70 36 90 35 1) 18 70 36 90 35 1) 70 90
Transit time in case of
fail-safe action s – 44667467
Nominal
thrust
Stem extends N 700 300 700 700 700 700 500 280 500 280
Stem retracts N – 700 – 280 – 280
Nominal thrust of safety
spring N – 500 280 3) 280
Attach-
ment
Force-locking ••••• •••• ••
Form-fit • • •
Power supply
24V,50Hz •• • •• • ••••
230 V, 50 Hz ••••••••••••••
120 V, 60 Hz • • • • • • ••••
Power consumption, apprx. VA 33636348484444
Manual override Yes Optional 2)
Permissible temperatures
Ambient 0 to 50 °C
Storage –20 to 70 °C
At connecting stem 0 to 130 °C
Degree of protection IP 54 (upright position, acc. to DIN IEC 529)
Class of protection II (acc. to VDE 0106)
Overvoltage category II (acc. to VDE 0110)
Degree of contamination 2 (acc. to VDE 0110)
Noise immunity EN 61000-6-2
Noise emission EN 61000-6-3
Weight Approx. kg 0.75 0.75 1 0.75 1 0.75 1 1.25 1 1.25 1111
1) Actuators with 6 mm travel can also be used for valves with 7.5 mm travel.
2) Manual override using a 4 mm Allen key after removing housing cover, always returns to fail-safe position after
release
3) Safety spring pulls the actuator stem into the retracted final position; valve operated over the valve spring

EB 5824 EN 7
Design and principle of operation
Actuator Type 5824 5825
-10 -12 -13 -20 -23 -30 -10 -13 -20 -23 -30 -15 -25 -35
Fail-safe action – Stem extends Stem retracts
Materials
Housing, housing cover Plastic (PPO glass fiber reinforced)
Coupling nut Brass
Additional electrical equipment
Positioner 4) · For 24 V only;
Input 0 (2) to 10 V or 0 (4) to
20 mA, output 0 to 10 V,
reversible characteristic, split-
range (0 to 5 V, 5 to 10 V)
•• • •• • ••••
2 limit switches · Max. 230 V,
3 A; cannot be retrofitted! ••••••••••••••
1 potentiometer · 0 to 1000 Ω
±15 % (90 % of final value at
rated travel); max. 1 mA, 5 V •• • •• • ••••
4) Supply voltage; inputs and outputs are not electrically isolated.
Maximum 2 current inputs may be connected in series.
Ri(10 V) = 10 kΩ,R
i(20 mA) = 50 Ω,R a(min) = 1 kΩ

2 Attachment to valve
Depending on the version of the valve, the
actuator is connected to the valve either di-
rectly or over a rod-type yoke (Fig. 3).
2.1 Type 5824 Actuator
2.1.1Force-locking attachment
1. Retract the actuator stem by turning the
handwheel (2) counterclockwise.
2. Position the actuator on the valve con-
nection and tighten coupling nut (4) with
a tightening torque of 20 Nm.
2.1.2Form-fit attachment
1. Position actuator on the rod-type yoke
and tighten the coupling nut (4) with a
tightening torque of 20 Nm.
2. Position actuator with yoke (15) on the
valve and tighten the nut (17) with a
minimum tightening torque of 150 Nm.
3. Pull plug stem until it reaches the actua-
tor stem or extend actuator stem using
the handwheel (2).
4. Position the clamps of the stem connector
(16) included in the accessories on the
ends of the actuator stem and plug stem
and screw tight.
8EB 5824 EN
Attachment to valve
Force-locking attachment with a coupling nut,
e.g. on Type 3222 Valve Form-fit attachment with stem connector, e.g. with rod-type yoke on Series V2001 Valve
Fig. 3 · Attaching actuator and valve
2 Handwheel
3 Actuator stem
4 Coupling nut
15 Rod-type yoke
16 Stem connector
17 Nut

2.2 Type 5825 Actuator
2.2.1Force-locking attachment
Fail-safe action “Actuator stem extends”
1. Unscrew front cover and place a 4 mm
Allen key on the red actuating shaft.
2. Retract the actuator stem: Turn Allen key
counterclockwise only and only up to the
final travel value which is at the point
where the torque switch is activated
(switching off the synchronous motor).
Caution!
Turning the actuator too far will destroy it.
3. Keep Allen key in place and fasten valve
and actuator together using the coupling
screw (tightening torque 20 Nm). Re-
move Allen key and carefully screw the
front cover back on.
While taking the necessary safety pre-
cautions, the actuator stem can also be
retracted electrically when a voltage
signal is applied to the terminal eL con-
nected to N.
Fail-safe action “Actuator stem retracts”
Position the actuator on the valve connection
and tighten coupling nut with a tightening
torque of 20 Nm.
2.2.2Form-fit attachment
For fail-safe action “Actuator stem retracts”
or “Actuator stem extends”, attach actuator
as described in section 2.1.2.
2.3 Mounting position
The control valve must be mounted in the
pipeline with the Type 5824/5825 Actuator
on top to achieve the stated degree of pro-
tection.
2.4 Travel indicator scale
The travel indicator scale has two opposed
scales for adaptation to different valve ver-
sions. Which scale should be used depends
on the valve version (Fig. 4)
Globe and three-way diverting valves · The
driving pin is in position 0 (delivered state)
Three-way mixing valves · Remove scale,
turn it and replace it so that the pin is posi-
tioned over the appropriate hole (6, 12 or
15) corresponding to the rated travel
(6 mm, 12 mm or 15 mm travel).
Replacement scales for older actuators are
available on request.
EB 5824 EN 9
Attachment to valve
Fig. 4 · Scale for travel indication
Hole for
driving pin
with three-way
mixing valve
Driving pin
in position 0,
location of scale with globe or three-way diverting
valves (standard)

3 Electrical connection
For installation of the electric cables,
you are required to observe the regula-
tions for electrical power systems ac-
cording to DIN VDE 0100 as well as
the regulations of your local power
supplier.
Use a suitable power supply which
guarantees that no dangerous voltages
from the system or parts of the system
reach the device in standard operation
or in the event of a fault.
Caution!
Only connect the device to the main
power network when the power is
switched off. Make sure the power
cannot be switched on unintentionally!
Particularly for 24 V, 50 Hz actuators,
use wires with a sufficiently large
cross-section to guarantee that the per-
missible voltage tolerances of
±
10 %
are not exceeded.
1. Establish electrical connection over the
cable entries (1.2 in Fig. 2) as illustrated
in Fig. 5 while observing the following
important instructions.
The control signals of the controller are con-
nected to the terminals eL and aL:
4If voltage is applied to eL, the actuator
motor retracts the actuator stem in oper-
ating direction "IN" (into the actuator).
4Voltage applied to aL causes the actua-
tor stem to extend in operating direction
"OUT" (out of the actuator).
Important instructions:
4The interference suppression capacitors
Ceinstalled in the output circuit of the
connected controllers may not exceed a
value of 2.5 nF, otherwise the proper
functioning of the actuator cannot be
guaranteed.
When actuators are to be connected to
controllers with larger interference sup-
pression capacitors, a special version is
available on request.
4Actuators operated in parallel must be
connected over separate contacts to pre-
vent the actuators hunting in the end po-
sitions due to a shared OPEN or
CLOSED contact.
4The 0 (2) to 10 V control signal must be
connected to the terminals 12 and 13,
whereas a 0 (4) to 20 mA control signal
must be connected to terminals 11 and
12 in versions with continuous-action
signal input.
4Do not connect more than two mA in-
puts in series.
4If more than two actuators are to be con-
nected to one controller, use 10 V inputs
and convert 20 mA signals into 10 V by
using resistors (RTotal = 500 Ω) connected
in parallel.
Use two-core cables for voltage supply,
signal input and output.
The “–“ inputs (terminals 12 and 32) can
be combined.
10 EB 5824 EN
Electrical connection