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A11 Valve
A5251/IL
Figure 7. Typical Seal Installation
For Phoenix III seal installation:
1. Locate the replacement seal ring (key 8) and note
the shape of the ring. The ring is wider across one
edge diameter and narrower across the other edge
diameter as shown in figure 6. Around the outside
circumference is one wide groove.
Install the seal ring in the valve body by first placing
the wider outside diameter of the seal ring, as
marked in figure 6, into the T-slot area of the valve
body which is shown in figure 7. Phoenix III seal
rings without a back-up ring will fall into place. If the
Phoenix III seal uses a back-up ring (key 9), the
back-up ring will have to be installed after placing
the seal ring in the valve using a blunt end
screwdriver. Do not use the screwdriver or seal tool
directly on the metal seat. Use a tool only on the
backup ring.
2. With the seal ring inserted all the way around the
valve body T-slot now lay the backup ring into the
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Figure 6. Typical Seal Ring (Sectional)
opening between the valve body and the seal ring.
Use the seal tool to apply pressure to the backup
ring and carefully tuck the backup ring down into the
T-slot between the valve body and the seal ring.
Note: On larger valves, it may be more efficient to
have someone hold down the seal ring while the
backup ring is pushed into the T-slot.
3. Once the seal ring or seal and backup ring has
been fully installed into the valve body T-slot, the
retaining ring gasket (key 17) can be installed.
CAUTION
This gasket is a thin graphite material.
Take care to avoid damaging the
gasket. However, punch one initial
screw hole through the gasket for
alignment purposes.
4. Install the retaining ring and align the screw holes
in the retaining ring with the holes in the valve body.
Install the first retaining ring screw through the
punched hole in the ring gasket. Install the other ring
screws by pushing the screws through the graphite
gasket and threading them into valve body.
5. Tighten the retaining ring screws just enough to
eliminate vertical movement of the retaining ring. Do
not tighten the retaining ring screws.
WARNING
Avoid personal injury or property
damage caused by the impact of a
falling or tipping large valve. Large
valves must be properly supported
during maintenance.
6. To complete this step, stand the valve up.
Support the valve securely using methods
appropriate for the valve size.
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