14
October 2021
Service Manual
VCIOM-16909-EN Rev. 0
11
Section 4: Manual Actuator Operation Under Maintenance
Manual Actuator Operation Under Maintenance
4.1.1
Direction of rotation of handwheel for closing the valve,
Fail-safe direction "CW"
Figure 4
Rotation of direction for fail-safe direction "CW"
Fai
l-s
af
e 90° CW c
lock
wis
e r
ot
ati
on
handwheel
direction of
rotation:
Closing
handwheel
direction of
rotation:
Closing
fail-safe close
z13 (z11)
z13 (z11)
fail-safe open