Flowserve HV 205 - Manual (Page 23)

23
Maintenance
– continued –
Reworking seat flange
If the seating surface of the seat flange is slightly damaged you can remove and rework
the seat flange. For more details see drawing below.
To remove the seat flange please proceed as follows:
Drawing see page 19
1. Remove body and the actuating cylinder .
2. Unscrew the 12 socket-head cap screws and their associated locking washers
and remove the seat flange. Take out the gasket .
3. Unscrew the 6 stay bolts together with the sleeves out of the seat flange .
Re-assembly in reverse order:
Drawing see page 19
1. First push the sleeves onto the 6 stay bolts and screw them with a torque of 25
Nm to the seat flange . Apply a commerically available lubricant to the screws and
tighten them.
2. To mount the valve head follow the specified procedure (see page 19).
3. Then put a new gasket onto the seat flange .
4. Use the 12 socket-head cap screws together with their locking washers to
attach the valve head to the mounting flange. Tighten them with a torque of 120 Nm.
Apply a commerically available lubricant to the screws and tighten them in several
steps in diagonally opposite pairs.
D
23 24
6
4 5 7
5 4
7
6 7
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Attention
The specified torques must be strictly observed.
(Ø 85 )
max.5 x 45°
Ra 0.8