ARI Armaturen FA800 EN - Manual (Page 11)

Rev. 0040504003 2310 Page 11
Operating and installation instructions
Pneumatic actuators - FA160-800
5.6 Retrofit procedure for "Spring opens on air failure" operating mode
- Move the valve into the "half open" (neutral bellows) position using the handwheel.
Loosen the nut on the handwheel's upper stem, then pull the handwheel off the square on
the upper stem.
- The valve coupling (pos. 45) between the upper and lower stem can be loosened using an
Allen key. Pull off the coupling halves after completely unscrewing the hexagon socket
bolts (pos. 46).
- Using a suitable tool (e.g. a drift), drive the straight pin (pos. 14) into the threaded bush
(pos. 15) on the valve. The threaded bush can now be unscrewed.
- Screw the actuator onto the valve so that it rests on the FABA-Supra bonnet. Now apply
slight control air pressure (approx. 1 bar; use a pressure reducing valve or similar) to the
control pressure connection on the top of the actuator, so that the valve and actuator stem
(pos. 50.1) is gradually extended and the two coupling halves (pos. 45) can be connected
to it. Screw the two coupling halves together with the hexagon socket bolts (pos. 46), but
not tight.
- Screw the actuator onto the bonnet as far as it will go while steadying it on the flat (pos.
50.2) and tighten it to the specified torque (refer to the table). Screw the lock nut (pos.
50.5) against the bonnet and tighten it to the specified torque (refer to the table).
- Tighten the hexagon socket bolts (pos. 46) on the coupling to the specified torque (refer to
the table).
- The actuator is now completely mounted and the control line can be connected at the top.
The FABA-Supra valve is opened by the spring force if the control air pressure fails.
For the maximum closing pressure of the individual valves, refer to 4.5.
Actuator Head
(pos. 50.2)
Lock nut
(pos. 50.5)
Hexagon socket bolt
(pos. 46)
FA160 - FA400 100 Nm 120 Nm 5 Nm
FA400 (DN80-100) 135 Nm 165 Nm 5 Nm
FA800 280 Nm 360 Nm 15 Nm