10 3 R 74 en
❑ Check that the spring angles extend to the con-
trol face.
❑ Place a screwdriver on each visible spring angle
one after the other and knock the spring into the
groove, see Fig. 23.
❑ Turn the segment 180° clockwise and knock the
rest of the spring angles into the groove, Fig. 24.
A special tool available from the manufacturer
may also be used for the work phases in Figs. 23
and 24.
❑ Use a plastic spindle to ensure that the seat is
correctly placed and can move freely, Fig. 25.
4.6 Dismantling the valve
❑ Turn the valve into the closed position.
❑ Remove the pin lockings either by grinding or
using a spindle. Detach the pins (14 and 15) by
drilling, Fig. 26. Be careful not to damage the
original bores. Note! The pins and the drive shaft
have been secured by welding in the titanium
version and in the acid-resistant high-consist-
ency version S.
❑ Detach the retainer plates (30).
❑ Detach the gland packings (20).
❑ Remove the shafts (11 and 12), Fig. 27.
❑ Lift the segment from the body.
❑ Remove the bearings (16 and 17) and clean the
bearing spaces.
❑ Remove the seat by pushing it evenly inside the
body.
4.7 Inspection of removed parts
❑ Clean the removed parts.
❑ See if the shafts (11, 12) and bearings (16, 17)
are damaged.
❑ Check if the sealing surfaces of the segment and
the seat (4) are damaged.
❑ If necessary, replace the parts with new.
Fig. 22 Pushing the the spring angles against the
control face
Fig. 23 Knocking the spring into the groove
Fig. 24 Knocking the spring after turning the seat around
Fig. 25 Securing with a plastic spindle
Fig. 26 Drilling the pin
Conical pin
part no. 15
DN 25...500
A - A
A
Cylindrical pin
part no. 14
DN 25...40
Cylindrical pin
part no. 14
DN 50...500
DN DRILL ø (mm) L (mm)
25, 40 2,0 18
50, 65 3,5 25
80, 100 4,2 33
150 5,0 43
200 7,0 52
250, 300 8,8 60
350, 400 12,0 90
500 16,0 120
L
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