Samson Type 5824, Mounting And Operating Instructions

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EB 5824-1 EN 3-1
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 switches
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 (force-lock-
ing attachment), the plug stem follows the
movement of the actuator stem as a result of
the return spring in the valve.
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
Retracts
Extends
1 Housing
1.1 Front housing 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 contacts
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 switch
Do not open the back
housing cover.
Fig. 3-1: Type 5824/5825 Actuator (front cover open), force-locking attachment
When the actuator stem retracts (form-fit at -
tachment), the plug stem is connected to the
actuator stem and follows its movement.
Type 5824 without fail-safe action
The 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).
3.1 Fail-safe action
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