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General Maintenance
4.9 Rupture Disc Replacement
If a rupture disc bursts, nd and correct the prob-
lem that caused excessive pressure, then use the
following procedure to replace the rupture disc.
Refer to the drawing at the bottom of this page
for additional reference.
Replacing the rupture disc:
1. Use two wrenches, one to prevent the base
from turning and the other to turn the rupture
disc cap, to remove the rupture disc cap as-
sembly from the base.
2. Remove the hold down ring from the base
(Item 4 in drawing below) and set it in a clean,
safe location.
3. Remove the blown rupture disc.
4. Insert a new rupture disc into the base as-
sembly. Be sure it is the same pressure rating
as the one being replaced.
5. Place the hold down ring on top of the rupture
disc.
6. Install the rupture disc cap assembly on the
base and tighten to specication.
Rupture Disc Assembly On Manual Bypass Valve
Typical Rupture Disc Rating
# DESCRIPTION
1 O-ring
2 Base 40K Male Port
9/16” High Pressure Male
3 Rupture Disc
4 Hold Down Ring
5 Cap
Rupture Disc & Holder Assembly
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