231
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
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MAINTENANCE AND FUNCTIONAL CHECKS
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REV. 00
EN
Step Action
45
Place the lower cover (3) on the plug guide (2).
NOTICE!
The hole for the passage of the loading pressure must match the similar one on the plug guide.
46
Insert and fasten the screws of the lower part (27) in the lower cover (3) according to the tightening torque:
• DN 1”: tab. 9.107
• DN 2”: tab. 9.108
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
47
Put the diaphragm unit in place (10, 12, 13, 21, 29, 45, 50, 62).
48
Make sure that the key (28) is in the correct position in the stem (6).
49
Insert and secure the balancing stem guide (11) according to the tightening torque:
• DN 1”: tab. 9.107
• DN 2”: tab. 9.108
NOTICE!
During this phase:
•
hold the diaphragm assembly in place by positioning the spanner in the holes in the upper
diaphragm support (13);
•
The holes in the diaphragm must match the holes in the lower cover (3).
50
Position the upper cover (3), taking care to position the indicator stem (18) in the space between the upper
diaphragm support (13) and the balance stem guide (11).
NOTICE!
•
The indicator rod (18) must not obstruct the pouring hole (21) on the upper diaphragm sup
-
port (13);
•
The flange travel indicator must be visible and perpendicular to the gas flow.
51
Insert and fasten the screws (25) with the nuts (26) according to the tightening torque:
• DN 1”: tab. 9.104
• DN 2”: tab. 9,105
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
52
Put the spacer (22) and the spring (54) in place.
NOTICE!
Fit the spacer (34) so that the stop with the narrower hole rests on the surface of the stem (6).
53
Insert the plug (5).
54
Insert the locking nut (9) according to the tightening torque:
• DN 1”: tab. 9.107
• DN 2”: tab. 9.108
NOTICE!
Before fixing the lock nut (9), check that the spring (80) is well seated in the appropriate centring
stop on the plug guide (70).
Содержание REVAL 182
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