The value of torque available in the
open direction can be configured. Refer
to valve manufacturer for
recommended value.
50
Q
Q
P?
O
PC
O
Ir
O
Ic
Q
cr
Q
c1
O
c2
O
c3
Q
tC
O
tO
Q
LC
O
LO
Q
50
The opening torque value can be varied
between 40% and Rated, in 1%
increments. In addition “Boost” can be
configured when no open torque
protection is required.
BOOST SHOULD NOT BE
SELECTED WHEN THE ACTUATOR
HAS BEEN CONFIGURED TO OPEN
ON TORQUE
(refer to
[C3]
page 19)
unless back seating at Rated torque is
acceptable.
Using the
+
and
-
keys display the
recommended torque value.
In the absence of a recommended
torque value, try a low setting and
increase until satisfactory valve
operation is achieved.
NOTE:
Rated torque is quoted on the
actuator nameplate. Boost torque is at
least 140% of Rated torque.
PRESS THE
KEY.
The displayed value will flash, indicating
that it has been set.
Should the set value of torque be
developed in opening, the actuator will
torque trip and stop.
PRESS THE
Q
KEY.
40%
99%
Rated
Boost
In checking mode, on pressing the
Q
key after reviewing open torque setting,
the display will revert to valve position.
21
Torque Valve Opening
tO
