199
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
Put the lower cover (3) in place and fix it 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. 9.96
• DN 8”: tab. 9.97
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. 9.96
• DN 8”: tab. 9.97
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.
54
Insert and fasten the screws (25) with the nuts (26) according to the tightening torque:
• DN 6”: tab. 9.96
• DN 8”: tab. 9.97
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
55
Put the spring (54) and spring support (34) in place.
NOTICE!
Check that the spring (54) is properly seated in the centring stop on the plug guide (2).
57
Insert slewing ring (131) and radial bearing (130).
58
Insert the locking nut (9) according to the tightening torque:
• DN 6”: tab. 9.96
• DN 8”: tab. 9.97
Summary of Contents for REVAL 182
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