A4
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A4
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A4
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A4
A4
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A4
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IQ3 Full Configuration Manual – Section: Settings
9
Valve Type
Close Action
Open Action
Wedge gate
Torque
Limit
Globe
Torque
Limit
Butterfly
Limit
Limit
Through conduit
Limit
Limit
Ball
Limit
Limit
Plug
Limit
Limit
Sluice gate
Limit
Limit
Penstock
Limit
Limit
Parallel slide
Limit
Limit
Limit (default)
– The actuator will move the valve to the set
Closed Limit position and stop.
Torque
– The actuator will move the valve to the set Closed
Limit position and then apply the set torque (3/15) to seat the
valve.
To change, . The checkbox will indicate the set
closing action.
3/15
Close Torque
The value of torque available to close the valve can be limited
between 40% and 100% of its nameplate rated torque. If the
actuator experiences the set torque when closing between the
limits, it will stop and must then be reversed before it will move
closed again. Operational torque can be monitored using the
data log (refer to 4) and using the torque-position home screen
(refer to 2.2.2).
The default setting for closed torque limit is 40%. If a
value of torque was specified at time of order, the %
value equating to the specified torque will have been set
by Rotork.
If the actuator was delivered complete with valve, the
valvemaker may have set the closed torque limit based on
testing and/or design requirements.
In the absence of valvemaker instruction, set the minimum
value required to close the valve under process conditions.
To change, . The slider will indicate the set
closing torque value.
4/15
Close Limit
Limits must only be set when the actuator is coupled to the valve.
The minimum number of output turns between set Closed and
Open Limits is 2.5 or 30º (IQT). A Closed Limit position cannot
be set if the actuator is at its set Open Limit or within 2.5 (30º)
turns of an Open Limit position. Should a condition arise where
this occurs, for example where an actuator at its Closed Limit
position is coupled to a valve at its open position, refer to 2.6
Defaults - Limits.
If the actuator was delivered complete with valve, the
valvemaker should have set the Closed and Open limit
position, refer to testing below.
The Closed Limit position must be set by moving the actuator to
the valve Closed Limit position and pressing .
The actuator will display the following Instruction:
Move the actuator and valve to the close position. Allow for
overrun by winding open by ½ to 1 output turn.
Press to select OK.
The Closed Limit will be set at the current valve position. If not
previously illuminated, the closed indication LED (default green,
refer to 2.2.2) will be turned on.
Testing:
The limit position can be confirmed by opening the
actuator until the indication LED changes colour and then
moving closed until the Closed Limit indication LED colour is
turned on at the set Closed Limit position.
Open Settings
5/15
Open Action
The actuator can be configured to open on torque for back-
seating valve types or limit for non back-seating valve types.
Refer to valve manufacturer for recommended setting.
In the absence of valvemaker instruction set open action
to Limit.
Limit (default)
– The actuator will move the valve to the set
Open Limit position and stop.
Torque
– The actuator will move the valve to the set Open Limit
position and then apply the set torque (6/15) to back-seat the
valve.
To change, . The checkbox will indicate the set
opening action.
6/15
Open Torque
The value of torque available to open the valve can be limited
between 40% and 100% of its nameplate rated torque. If the
actuator experiences the set torque when opening between the
limits, it will stop and must then be reversed before it will move
open again. Operational torque can be monitored using the data
log (refer to 4) and using the torque-position home screen (refer
to 2.2.2).
The default setting for open torque limit is 40%. If a value
of torque was specified at time of order, the % value
equating to the specified torque will have been set by
Rotork.
If the actuator was delivered complete with valve, the
valvemaker may have set the closed torque limit based on
testing and/or design requirements.
In the absence of valvemaker instruction, set the minimum
value required to open the valve under process conditions
but higher than that set for closed torque.
To change, . The slider will indicate the set limit
of opening torque value.
2.1 Settings – Limits
continued
Summary of Contents for IQ Multi-Turn
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