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 TM 55-1905-223-24-18-1
Install valve in piping system.
a.
NOTE
All sealing surfaces must be thoroughly cleaned and checked
for signs of damage or corrosion before replacement of
valve.
(1) Clean and inspect sealing surfaces.
(2) Position butterfly valve (5) in piping with inlet and outlet piping
aligned.
( 3 ) Insert studs (6) through flange boltholes.
(4) Thread outlet flange nuts (3) on studs (6).
(5) Thread inlet flange nuts (2) on studs (6), but do not tighten.
Torque valve.
b.
Do not continue to tighten bolts after metal to metal
contact is made. Excessive torque may distort flanges.
NOTE
Make sure all nuts are tightened evenly and that the flange
faces are aligned.
(1) Tighten nuts in sequence as shown in FIGURE 2-263.
(2) Tighten nuts until a noticeable increase in torque is felt and when metal
to metal contact is made.
c. Operational check.
(1) Remove warning tags and turn on electrical power at 240 V main
switchboard.
(2) Operate system; refer to TM 55-1905-223-10.
(3) Check for leaks in system and retighten connections as necessary.
2-991
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