14
3L.P. GAS s.r.l.
TECHNICAL MANUAL ICM
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 reassembly,
while static parts require grease to render them
softer but, especially, to hold them in their slots:
16) Fix the shaft guide, pos. 33, to the valve body.
17) Fit the pressure control back on the valve body.
18) Secure this by screwing in the screws, pos. 40.
19) Put back the retaining ring, pos. 52.
20) Position the reset lever, pos. 36.
21) Put back the retaining ring, pos. 52.
22) Put back the slam-shut cover, pos. 17.
23) Fix the screws, pos. 42, of the slam-shut cover,
pos.17.
24) Reconnect the sensing line which connects the
pressure control of the slam-shut to the
downstream piping, and fix the taper seal
connections.
25) Put back the slam-shut obturator support, pos.
12, along with the spring, pos. 42, and the
obturator pos. 10.
26) Fit back the slam-shut flange, pos. 14 and fix the
screws pos. 46.
CHECKING THE TIGHTNESS AND SETTING
27) Very slowly open the on/off valve upstream from
the slam-shut and using a foam solution or the
like check:
• the tightness of the external surfaces of the
slam-shut;
• the tightness of the slam-shut;
• the tightness of the internal surfaces of the slam-
shut;
• the tightness of the fittings.
28) Operating very slowly, turn the reset lever, pos.
36, of the slam-shut from the vertical position
towards the horizontal position until only the
internal by-pass is opened. Then raise the lever
completely to the re-engage position.
START UP
29) Very slowly open the downstream on/off valve.
