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 TM 55-1905-223-24-18-1
Repair at this level of maintenance is by replacement of the flanged valves and
gaskets in the bilge ballast and firemain system.
CAUTION
To prevent damaging system make sure valves are installed so
that the disc will open with the direction of flow.
Install valve in piping system.
a.
(1) Position valve (3) in piping with inlet and outlet piping aligned.
(2) Hold valve (3) in place and insert gasket (5) between valve outlet flange
and outlet piping flange.
NOTE
Flanges four to eight inches in diameter use eight bolts;
flanges below four inches use four bolts.
(3) Align gasket boltholes with flange boltholes.
(4) Insert bolts (7) through aligned boltholes of gasket and flanges.
(5) Thread nuts (8) onto each outlet flange bolt (7) but do not tighten.
(6) Position gasket (2) between valve inlet flange and inlet piping flange.
(7) Align gasket boltholes with flange boltholes.
(8) Insert bolts (9) through aligned boltholes of gasket and flanges.
(9) Thread nuts (4) onto each inlet flange bolt (9).
Torque valve.
b.
CAUTION
Do not continue to tighten bolts after metal to metal
contact is made. Excessive torque may distort flanges.
NOTE
Make sure all bolts are tightened evenly and that the gasket
and flange faces are aligned.
2-987
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