Pentair F783E, Operating Manual

Page: 28 / 33

F783E Ex ‐ ia
Pg 28
00 ‐ ISN ‐ 203_Rev B
29/01/2021
Procedure
The control head can be posi oned in two orienta ons with respect to the actuator, as set by the two moun ng bolts that
retain the control head onto the actuator or adaptor.

In the case of the F257 rotary actuator, only one posi on will allow the use of the internal por ng facility. The other
posi on will blank the internal ports.

In the case of a linear actuator choose the orienta on that is most convenient for the rou ng of the airlines from the
control head to the actuator control ports.
The exhaust is fi ed with a silencer on leaving the factory. If required this can be replaced with an exhaust airline by
removing the exhaust silencer from the one ‐ touch fi ng and installing an airline of the correct size. The default size for the
F783E Ex ‐ ia is 6mm air tube.
NOTE!

Use only airlines of the correct size for the fi ngs installed. If in doubt, the size of the airline is imprinted on the air
fi ng collet.

Always use a hose cu er designed for the air tube. Scissors, saws and knives are not suitable hose cu ers.

Allow su ffi cient length on airlines to avoid kinking of the tube, or tension on the fi ng. Either will lead to premature
failure of the airline, and possible injury or product loss.

Always use an airline of the required quality to suit the environment.
If using an exhaust airline, ensure the length and bore of the airline do not restrict the
fl ow from the actuator to
exhaust.

Set the fl ow restric on func on of the air switch only when required and a er comple on of all necessary installa on.
The fl ow restric on screws on the solenoid valve are used to control the rate of fl ow from the exhaust of the two sides of the
cylinder.
Once the desired
fl ow rate has been set ghten the locking nuts to prevent the screws moving during opera on
Once the fl ow screws are set, close the housing in accordance with the instruc ons in Chapter 8 “Opening and closing the
control head”
Fig 9: Se ng the exhaust fl ow restrictors