Samson 5825 Mounting And Operating Instructions - Ation
12
EB 5824-1 EN
Design and principle of operation
3 Design and principle of oper-
ation
The actuator contains a reversible synchro-
nous motor and a maintenance-free gear.
The motor is switched off by torque-depen-
dent limit contacts or in case of overload.
The force of the motor is transmitted to the
actuator stem (3) via gear and crank disk.
When the actuator stem extends, the actua-
tor piston (3) pushes against the valve's plug
stem. When the actuator stem retracts, the
return spring in the valve causes the plug
stem to follow the movement (force-locking
connection).
Actuator and valve are connected by the
coupling nut (4).
Type 5824 without fail-safe action
This actuator without fail-safe action has a
handwheel (2) used to manually position the
valve. Travel and direction of action can be
read off the travel indication scale (9).
Type 5825 with fail-safe action
The actuator contains a spring mechanism
(8) and an electromagnet. The actuator is
moved by the force of the spring to the fail-
safe position when the electromagnet (termi-
nals L and N) is de-energized. The direction
of action depends on the actuator version
and cannot be reversed.
The Type 5825 Actuator is available with
fail-safe action "actuator stem extends" or
"actuator stem retracts".
0
6 12
15
1512
6
0
10
9
9.1
8
7.2
2
1.1
7.1
1.2
4
5
6
3
1
2.1
ON
OFF
1
Housing
1.1 Front cover
1.2 Cable entry
2
Handwheel (Type 5824 only)
2.1 Actuating shaft
3
Actuator stem with actuator
piston
4
Coupling nut
5
Cam disk
6
Limit contact
7.1 Adjuster for limit contact
(bottom contact cam)
7.2 Adjuster for limit contact
(top contact cam)
8
Spring assembly (Type 5825
only)
9
Travel indication scale
9.1 Follower pin
10
Torque-dependent limit switch
Do not open the back
housing cover.
Fig. 1: Type 5824/5825 Actuator (front cover open), force-locking attachment