Flowserve Limitorque QX User Manual

Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
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4.5 Torque Switch Timer
Torque switch timer permits a user to select a time for the torque switch to time out once the actuator determines that it has reached
its torque seat. The torque switch timer can be adjusted from zero (0) seconds to a maximum of ten (10) seconds. The default is five
(5) seconds.
NOTE: The purpose of this feature is to ensure that the torque sensing has shut off the motor after a brief period of time. It is an
additional safety feature to prevent the actuator from reaching a stall torque. If operating in torque seating for either open or close
torque seating, a backup timer can be used to halt the actuator to protect the valve in case the actuator does not torque out after it
has passed the expected limit.
1. From “CHANGE VALVE SETUP?” select “NO” to get to the “CHANGE TORQUE TIMER” routine. This option will only appear if
either the open or close valve setting is set to torque seating.
2. Select “YES” to change setting. If “NO” is selected, the “CHANGE OPERATING TIME?” routine will be entered.
4.5.1 Status
Default = ON
1. Select “NO” to change torque timer status to “OFF”. If “OFF” is selected you will not advance to timer selection for that direction.
4.5.2 Torque Timer
The timer value is how long in seconds that the unit will run once it has passed the expected position limit.
Default = 5 seconds
1. Select “NO” to increase the timer value. The timer is configurable from 1-10 seconds. The counter will wrap around
to 1 second when you attempt to increase after 10 seconds.
NOTE: If the unit is only setup for open torque seating, then only the open torque timer will be available to change. This is the same
with close torque seating and the close torque timer. If both open and close torque seating are selected then you will be prompted to
change close torque timer first, followed by open torque timer.
Figure 4.6 – Torque Switch Timer
YES
1
YES
5
YES
2
YES
4
YES
6

YES
8
CHANGE
TORQUE SETUP?
CHANGE
TORQUE TIMERS?
CLOSE TORQUE
TIMER ON/OFF OK?
CLOSE TORQUE
TIMER #SEC OK?
OPEN TORQUE
TIMER ON/OFF OK?
NO
9
NO
YES
3
NO
10
YES
CHANGE
VALVE SETUP?
OPEN TORQUE
TIMER #SEC OK?
1 - 10 SEC
DEFAULT 5 SEC
1 - 10 SEC
DEFAULT 5 SEC
DEFAULT ON
DEFAULT ON
YES YES
7
Note 1: YES & CLOSE Torque Seated
Note 2: YES & OPEN Torque Seated CLOSE Position Seated
Note 3: YES & TIMER OFF
Note 4: YES & TIMER ON
Note 5: YES & TIMER OFF & OPEN Torque Seated
Note 6: YES & OPEN Torque Seated
Note 7: YES & TIMER OFF
Note 8: YES & TIMER ON
Note 9: NO & Open or Close Torque Seated
Note 10: NO & OPEN/CLOSE Position Seated

Flowserve Limitorque QX Specifications

General

Brand	Flowserve
Model	Limitorque QX
Category	Controller
Language	English