A4US
US
A4
US A4
US
A4
A4 US
US
A4
US
A4
A4 US
Limits > Torque Limit Bypass [TRQ.LIM.B.P.]
Occasionally applications will require a break to open or break
to close torque that exceeds the standard torque limit. Setting
the torque limit bypass will ignore existing torque limit settings
and apply maximum torque (up to approximately 150% or
rated) across a predetermined portion of travel.
CAUTION: The valvemaker / integrator should be
consulted to confirm the valve structure and
interface components can withstand the additional
torque/thrust
.
Torque Limit Bypass
The [OPENING] and [CLOSING] settings will enable torque
limit bypass for the relevant direction of travel, use
and
to enter the setting sub menu.
Press to edit, select [ON] or [OFF] and press
to save
selection.
Torque Limit Bypass Position
The [OP.BP.POSI.] value dictates the travel away from the
closed position limit that the torque limit will be bypassed in
the open direction.
Press to edit, adjust shown value using
and
and
press to save selection. E.g. setting at 5% will bypass the
torque limit between 0% and 5%.
The [CL.BP.POSI.] value dictates the travel away from the
open position limit that the torque limit will be bypassed in the
close direction.
Press to edit, adjust shown value using
and
and
press to save selection. E.g. setting at 95% will bypass the
torque limit between 95% and 100%.
9.8 Secondary Function Setting
CK Range actuators can be provided with optional add-ons
that provide extra functionality. For instruction on setting
secondary functions, please refer to the following documents
which are available on www.rotork.com
CK Standard and
CK
r
- refer to PUB111-003
CKa and CKra - refer to PUB111-110
CK
c
and CK
rc
- refer to PUB111-004
10 Maintenance, Monitoring
and Troubleshooting
Routine Maintenance should include the following :
• Check actuator to valve fixing bolts for tightness
• Ensure valve stems and drive nuts are clean and
properly lubricated
• If the motorised valve is rarely operated, a schedule
of operation should be set up
• Check the actuator for damage, loose or missing fixings
• Ensure that there is not an excessive build up of dust or
contaminate on the actuator
9 Commissioning
CK Range Safe Use and Installation Manual
28
To Next Page
Loading...
Need help?
General
