ARI Armaturen DP34 EN - Manual (Page 21)

0040504000 1210 Page 21
Operating and installation instructions
Pneumatic actuators - DP32 / DP33 / DP34
8.2 Replacing the guiding band and the o-ring
- Remove the actuator unit from the valve, as described in point 7.0, and disassemble.
- Replace the guiding band (pos. 3.2) and / or the O-ring (pos. 3.3).
- Pay attention that the top surface of the stem is clean and undamaged.
- Grease the guiding band (pos. 3.2), O-ring (pos. 3.3) and stem (pos. 1).
- Reassemble the actuator unit.
9.0 Alterations
9.1 Replacing the spring set
- Remove the actuator unit from the valve, as described in point 8.0, and disassemble.
9.1.1 Replacement by operation mode "actuator stem extends by spring force"
- Take off diaphragm cover (pos. 18) and remove compression springs (pos. 15).
DP32, DP33:
- Align the compression springs (pos. 15) onto the moulds pressed into the diaphragm plate
(pos. 11).
- Make sure the compression springs are positioned properly! (Fig. 23)
- Place the diaphragm cover (pos. 18) on top and screw together.
(Observe the tightening torques of the screws, see point 8.1)
DP34:
- Align the compression springs (pos. 15) onto the spring positioner (pos. 16) in the
diaphragm plate (pos. 11) and place the second spring positioner (pos. 16) onto the
compression springs (pos. 15).
- Make sure the compression springs are positioned properly (Fig. 25)!
Centre the compression springs (pos. 15) so, that over one of the draughts of the spring
positioner (pos. 16), the ventilation in the diaphragm cover (pos. 18) is aligned.
- Place the diaphragm cover (pos. 18) on top and screw together.
(Observe the tightening torques of the screws, see point 8.1)
ATTENTION !
- Observe the tightening torques of the screws (see point 8.1).
Fig. 24
ATTENTION !
- Warning notes are to be observed see point Punkt 7.0!