TECHNICAL MANUAL MT103
61
SB/82 SLAM-SHUT (FIG. 31 and 32)
1)
Check that the slam-shut is in the closed position.
2)
Disconnect the pipe between the downstream pressure take-off and the head of the slam-shut pressure
switch.
3)
Slacken the fixing screws, pos. , so as to partially slacken the spring, pos. ; before removing them
completely, ensure that you can support the wright of the slam-shut device adequately.
4)
Remove the screws and separate the slam-shut from the body, pos. .
5)
Put the slam-shut on its side.
6)
Unscrew the screws, pos.
, and remove the obturator, pos.
, and the spring, pos.
.
7)
Unscrew the ring, pos.
, and the ring, pos. , from the obturator, pos. .
8)
Keeping the shaft, pos. firm, slacken the screw, pos.
.
9)
Remove the ring, pos. , and the spring, pos.
.
10) Remove the retaining ring, pos. and the shaft guide, pos. .
11) Slacken the screws, pos. , from the pressure switch device, and remove the cover, pos. .
Replace all the components included in the spare parts kit.
RE-ASSEMBLY
12) Fit the cover, pos. , and fix the screws, pos.
on the pressure switch device.
13) Put back the shaft guide, pos.
and fix it with the retaining ring, pos. .
14) Put back the spring, pos.
and the ring, pos. , and fix the screw, pos. .
15) Put back the rings, pos. and pos. on the obturator, pos.
.
16) Put back the spring, pos. and the obturator, pos. , fixing the screws, pos. .
17) Put the slam-shut device back on the body, pos. and fix the screws, pos. .
18) Restore the connection between the downsteam pressure take-off and the head of the slam-shut pressure
switch.
36
48
9
3
2
47
2
18
1
6
26
4
48
28
10
2
1
2
1
10
28
48
4
26
2
1
18
2
3
9
36
47
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