User Manual MCx-B-xxxAx-8.09
Page 7 of 13
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Torque Settings
To accommodate different valves and other applications
with different torque requirements, the actuator can be set
to apply different torque on the valve stem when in the
seating mode.
During normal operation, the actuator will try to reach the
speed set by DIP 1 and DIP 2. It will use 100% torque to try
and reach the selected speed, regardless of the positions of
DIP 10 and DIP 11. Current draw is limited to 3 A
regardless of settings.
Please see the box to the right and the tables below to select the power setting that is right for your
application.
To deal with sticking valves, at the beginning of the first reversing movement after the seating (“zeroing”) of
the valve, the actuator will apply double the power set by DIP 10 and DIP 11 (up to 100% power.)
This “pull out” function is always enabled.
Speed and Torque Details
The maximum speed of the actuator can be set
by using the first two positions of the
DIP switch selector
.
As a result of this setting, the actuator will limit the maximum speed. The tables below show the time required
to complete one turn.
The seating torque depends on the voltage provided in the power connection and on the
seating power settings on DIP 10, 11 as shown below.
MC
L
-B-xxxAx Actuators
Speed:
Torque:
DIP 1
DIP 2
Time for
1 turn (sec)
DIP 10
DIP 11
Seating Torque
(in-lbs)
Operating
torque is
100%
OFF
OFF
7
OFF
OFF
12
OFF
ON
3
OFF
ON
20
ON
OFF
2
ON
OFF
38
ON
ON
1
ON
ON
48
NOTE
: If actuator is MC
J
-B-xxxAx, divide torque values by 3.
To convert in-lbs to Nm, divide by 9.
WARNING:
High power settings can supply enough torque to damage your valve.
Please be cautious, especially when using the 100% power setting.
Seating power settings:
DIP 10
DIP 11
Power
OFF
OFF
16%
OFF
ON
33%
ON
OFF
66%
ON
ON
100%
Note: 66% setting and 100% setting require voltage supply minimum values as follows:
-
Supply voltage needs to be min 14 VDC for 66% setting
-
Supply voltage needs to be 16 VDC for 100% setting
-
When operating above 20VDC and 66% power, Duty cycle is reduced to 50% - 25%
maximum. At these levels, the electronics produce more heat which must be dissipated
(depending on environmental temperature)
