Form #909 Rev A
following these procedures, refer to the diagram for item number locations unless otherwise
directed. Assembly is the reverse of these procedures.
Replacing the Orifice, Valve Disk Assembly and Lever
1. Disconnect the piping from the inlet housing (item 19)
2. Remove 4 screws (item 18) and the housing
3. Remove the orifice (item 22), and the 2 gaskets (item 21)
4. If necessary, disconnect the remote vent pipe
5. Remove the 2 screws that attach the diaphragm housing (item 14) to the inlet body (item 20) and
separate
6. Remove the pin (item 16) and slide out the lever (item 15). When replacing the lever, make sure the
slot in the lever contacts the connector (item 13).
7. Remove the carrier assembly (item 24) from the inlet body.
8. Using a 3/4" socket wrench, remove the valve disk and holder assembly (item 23).
9. Replace those parts that show wear, and reassemble.
Note: New gaskets (item 17 and 21) should always be installed when rebuilding a MEGR-1630 Regulator.
Replacing the Diaphragm
1. Loosen locknut (item 4) and turn adjustment screw (item 3) counterclockwise until all spring
compression is removed.
2. If necessary, disconnect the remote vent pipe.
3. To remove the bonnet (item 6), unscrew the nuts (item 11) and remove the bolts (item 12).
NOTE: Nuts will not be present on units with steel enclosures.
4. Separate the diaphragm assembly (items 8,9, 10 and 13) from the lever (item 15) and remove.
5. Unscrew the screw (item 8) from the connector assembly (item 13).
6. Install the new diaphragm, being certain that it is centered, and reassemble.
NOTE: Be careful not to twist the diaphragm/lever attachment during assembly. When installing the
bonnet, install the screws finger tight, turn the adjusting screw clockwise to slightly compress the
spring and take up any slack in the diaphragm, then finish tightening the screws and nuts.
Table 1
Spring
Range
(psig)
Adjusting
Screw
Spring Color
Code
27-50
Specify Spring
Range when
Ordering
Red Stripe
46-95
Olive Drab
90-150
Silver
150-200
Green Stripe
200-275
Blue Stripe
275-500
Yellow Stripe
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