11.
Setting the torque switching
11.1 Setting
.
The set torque must suit the valve!
.
This setting must only be changed with the consent of the
valve manufacturer!
.
Loosen both lock screws O at the torque dial (figure L).
.
Turn torque dial P to set it to the required torque (1 da Nm = 10 Nm).
Example:
Figure J shows the following setting:
3.5 da Nm = 35 Nm for direction CLOSE
4.5 da Nm = 45 Nm for direction OPEN
.
Tighten lock screws O again
.
The torque switches can also be operated in manual
operation.
.
The torque switching acts as overload protection over full
travel, also when stopping in the end positions by limit
switching.
11.2 Checking the
torque switches
The red test buttons T and P (figure K-2) are used for manual operation of
the torque switches:
.
Turning T in direction of the arrow TSC (DSR) triggers torque switch
CLOSED.
.
Turning P in direction of the arrow TSO (DÖL) triggers torque switch
OPEN.
.
If a DUO limit switching (optional) is installed in the actuator, the
intermediate position switches will be operated at the same time.
17
Multi-turn actuators SAN 07.1 – SAN 25.1/SARN 07.1 – SARN 25.1
Operation instructions
for valve automation in nuclear power plants
Figure L: Torque switching heads
Setting CLOSED
Setting OPEN
O
O
P
P
