PIETRO FIORENTINI NORVAL, Инструкция по установке, пусконаладке и обслуживанию

Страница: 45 / 59

TECHNICAL MANUAL MT044
22) Remove the obturator support of the slam-shut valve, pos. , along with the spring, pos. , and the
obturator, pos. .
23) Check and clean the inside of the regulator body.
24) Carefully check that the valve seat, pos. , is in a good state, both with regard to the regulator seat and
the slam-shut seat.
25) Disconnect the sensing line which connects the pressure control of the slam-shut to the downstream piping,
unscrewing the taper seal connections.
26) Slacken the fixing screws, pos. , of the slam-shut cover, pos. .
27) Remove the slam-shut cover, pos. .
28) Remove the retaining ring, pos. , which fixes the reset lever, pos. .
29) Remove the reset lever, pos. .
30) Remove the retaining ring, pos. .
31) Slacken and unscrew the screws, pos. .
32) Remove the pressure control from the regulator body.
33) Unscrew and remove the shaft guide, pos. .
34) 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:
35) Fix the shaft guide, pos. , to the regulator body.
36) Fit the pressure control back on the regulator body.
37) Secure this by screwing in the screws, pos. .
38) Put back the retaining ring, pos. .
39) Position the reset lever, pos. .
40) Put back the retaining ring, pos. .
41) Put back the slam-shut cover, pos. .
42) Fix the screws, pos. , of the slam-shut cover, pos. .
43) Reconnect the sensing line which connects the pressure control of the slam-shut to the downstream piping,
and fix the taper seal connections.
44) Put back the slam-shut obturator support, pos. , along with the spring, pos. , and the obturator,
pos. .
45) Fit back the intermediate flange, pos. , along with the rod guide sleeve, pos. .
46) Put back the lock ring, pos. , the balancing diaphragm, pos. , and the bushing, pos. .
47) Put the bottom cover, pos. , back in its ori-ginal position with the sensing line take-off turned towards
the downstream piping, and fix the screws, pos. .
48) Reconnect the sensing line which connects the bottom cover, pos. , to the downstream piping,
repositioning it and fixing the taper seal connections.
49) Fit the spacer, pos. , and the diaphragm support, pos. .
50) Put the rod, pos. , back on the bottom part of the regulator body, and screw in the self-locking nut,
pos. .
45
12
42
10
7
42
17
17
52
36
36
52
40
33
33
40
52
36
52
17
42
12
42
10
17
14
13
15
29
16
19
46
19
17 18
8
49