PIETRO FIORENTINI NORVAL, Инструкция по установке, пусконаладке и обслуживанию

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TECHNICAL MANUAL MT044
23) Slacken the fixing screws, pos. , of the slam-shut cover, pos. .
24) Remove the slam-shut cover, pos. .
25) Remove the retaining ring, pos. , which fixes the reset lever, pos. .
26) Remove the reset lever, pos. .
27) Remove the retaining ring, pos. .
28) Slacken and unscrew the screws, pos. .
29) Remove the pressure control from the regulator body.
30) Unscrew and remove the shaft guide, pos. .
31) Replace all the components included in the spare parts list.
RE-ASSEMBLY
Remembering that the O-rings and the sliding parts (rods, etc.) must be lightly lubricated with a fine layer of
silicone grease before re-assembly, while static parts require grease to render them softer but, especially, to
hold them in their slots:
32) Fix the shaft guide, pos. , to the regulator body.
33) Fit the pressure control back on the regulator body.
34) Secure this by screwing in the screws, pos. .
35) Put back the retaining ring, pos. .
36) Position the reset lever, pos. .
37) Put back the retaining ring, pos. .
38) Put back the slam-shut cover, pos. .
39) Fix the screws, pos. , of the slam-shut cover, pos. .
40) Reconnect the sensing line which connects the pressure control of the slam-shut to the downstream piping,
and fix the taper seal connections.
41) Put back the slam-shut obturator support, pos. , along with the spring, pos. , and the obturator,
pos. .
42) Fit back the intermediate flange, pos. , along with the rod guide sleeve, pos. .
43) Put back the lock ring, pos. , the balancing diaphragm, pos. , and the bushing, pos. .
44) Put the bottom cover, pos. , back in its original position with the sensing line take-off turned towards the
downstream piping, and fix the screws, pos. .
45) Reconnect the sensing line which connects the bottom cover, pos. , to the downstream piping,
repositioning it and fixing the taper seal connections.
46) Fit the spacer, pos. , and the diaphragm support, pos. .
47) Put the rod, pos. , back on the bottom part of the regulator body, and screw in the self-locking nut,
pos. .
48) Keeping the rod, pos. , fixed, fully tighten the self-locking nut, pos. .
49) Proceeding slowly, carry out vertical movements of the top of the rod to check that it moves properly.
50) Reassemble the gasket, pos. , the diaphragm, pos. , the diaphragm protection disc, pos.
and the spring support, pos. , and screw in the lock-nut, pos. .
51) Check that the holes in the diaphragm and bottom cover match and, keeping the diaphragm support fixed,
tighten the lock-nut, pos. .
41
42 17
52
52 36
36
52
40
33
33
40
52
36
52
17
42 17
12
42
10
14 13
15 29 16
19
46
19
17
18
8
49
8 49
28
20
26
27 50
50