251
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
48
Remove the stem guide (20), the stem (6) and the key (28).
NOTICE!
•
Lubricate the stem surface with silicone grease.
•
Make sure that the key (28) is in the correct position in the stem (6)
49
Place the lower cover (3) on the plug guide (2).
NOTICE!
Match the hole for the passage of the loading pressure to the similar one on the plug guide.
50
Insert and fasten the screws of the lower part (27) in the lower cover (3) according to the tightening torque:
• DN 6”: tab. 9.112
• DN 8”: tab. 9.113
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
51
Put the diaphragm unit in place (10, 12, 13, 21, 29, 45, 50, 62).
52
Insert and secure the balancing stem guide (11) according to the tightening torque:
• DN 6”: tab. 9.112
• DN 8”: tab. 9.113
NOTICE!
During this step, hold the diaphragm assembly in place by positioning the spanner in the holes in
the upper diaphragm support (13).
53
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 hole on the upper diaphragm support (13);
•
The flange travel indicator must be visible and perpendicular to the gas flow.
55
Insert and fasten the screws (25) with the nuts (26) according to the tightening torque:
• DN 6”: tab. 9.112
• DN 8”: tab. 9.113
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
56
Position the spring holder (34) and spring (54).
NOTICE!
Check that the spring (54) is properly seated in the centring stop on the plug guide (2).
57
Insert the locking nut (9) according to the tightening torque:
• DN 6”: tab. 9.112
• DN 8”: tab. 9.113
58
Insert the plug (5).
59
Insert the washer (23).
Summary of Contents for REVAL 182
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