rotork Skilmatic SI 3, Instructions For Safe Use, Installation, Basic Setup And Maintenance

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SI manual – Section: Basic Settings for Commissioning

Each actuator is built in the factory to 

be either Normally Closed, Normally 

Open or Stayput depending on what 

configuration was ordered.
Consult the factory if this configuration 

needs to be changed as it cannot be 

done through software alone.

7.5  Setting the Close Limits

The close settings are displayed on 

lines 1/12 to 6/12. 

1/12. Action

The actuator can be configured to 

close on pressure (hydraulic or spring) 

for seating valves or Limit for non-

seating valves. 

The actuator will stop at the 

mechanical end stop if set to Pressure 

and the electrical limit if set to Limit.

Press 

 to select Close Action 

function. Use   or   to check 

function setting. Press 

 to set.

2/12. Pressure Limit

This setting is the maximum cut-off 

pressure in a normally open actuator 

while traveling from the closed 

electrical limit to the closed mechanical 

end stop. The value set is a % of the 

maximum system pressure, which is 

limited by the pressure relief valve.

Press 

 to select the Pressure Limit 

function. Use   key to decrease value 

and   key to increase value.
Press 

 key to set.

3/12. Pressure Mid

This setting is the maximum cut-off 

pressure in a normally open actuator 

while traveling in mid-travel between 

the open and closed electrical limits 

while closing. This can be set between 

0% and 100%. When set at 0% the 

Pressure Mid value is set at the same as 

the Pressure Limit. When set between 

1% to 100%, the Pressure Mid value is 

a proportion of the maximum system 

pressure.

  WARNING: 

If the actuator fails to 

complete a close or open operation 

due to the set pressure being reached,  

it may indicate a valve and/or process  

problem or change. It is the responsibility 

of the user to ensure the valve and 

process conditions are within the 

specified operational limits.

4/12. Semi Auto Setup

When this setting is on, it allows the 

closed electrical limit to be set by 

moving the actuator to the closed 

mechanical end stop and storing its 

position. The electrical limit will then 

be scaled in 1% between the closed 

and open end stops.

When this setting is off, it allows the 

closed electrical limit to be manually 

set by moving the actuator to the 

desired position and then storing it. 

The electrical limit needs to be set in 

from the mechanical end stop by at 

least 1%.

5/12. Set Limit

Press 

 to set the closed limit.

If Semi Auto Setup is turned on the 

following instruction will be shown:

Move to closed limit.

Move the actuator to the closed 

mechanical end stop using the local 

controls and select OK.
If Semi Auto Setup is turned off the 

following instruction will be shown:

Move to closed limit 
and allow for overrun.

Move the actuator to the closed 

position where the electrical limit 

needs to be set using the local controls 

and select OK.

6/12. Sensor Position

This is a live reading of the position 

sensor which can be viewed when 

setting the limits. This setting is non-

adjustable.