Type 5825 Actuator; Force-Locking Connection; Form-Fit Connection; Travel Indicator Scale - Samson 5824 Mounting And Operating Instructions

2.2 Type 5825 Actuator

2.2.1 Force-locking connection

Fail-safe action "Actuator stem extends":
1. Unscrew front cover and place 4 mm
hexagonal wrench into the red actuat-
ing shaft (Fig. 2, 2.1).
2. Use the wrench to retract the actuator
stem. However, turn counterclockwise
only and only to the point where the
internal torque switch (Fig. 2, 10) is
activated.
3. Keep the wrench positioned and con-
nect valve and actuator using the
coupling nut (tightening torque 20 Nm).
Reinstall the front cover and carefully fix
it using the screws.
Fail-safe action "Actuator stem retracts":
Position the actuator on the valve connec-
tion and tighten coupling nut using a
tightening torque of 20 Nm.

2.2.2 Form-fit connection

Proceed as described in chapter 2.1.2 for
versions both with fail-safe action "Actuator
stem retracts" and "Actuator stem extends."

2.3 Travel indicator scale

The travel indicator scale has two opposing
scales to satisfy different valve versions.
Upon delivery (default), the scale is placed
so that the driving pin is at position 0. This
position is used for globe valves and three-
way diverting valves.
For three-way mixing valves, remove the
scale, turn it by roughly 180° and reposi-
tion it so that the appropriate bore (12 or
15 according to the rated travel) is placed
over the driving pin.
Bores for pin for three-way
mixing valves
0
0
Pin in position 0:
scale positioned for globe valves
and three-way diverting valves (default)
Fig. 4 ⋅ Mounting of travel indicator scale

3. Installing the control valve

The control valve must be installed in the
pipeline with the actuator on top so as to
ensure the stated degree of protection.
Installing the control valve
EB 5824-1 EN
9