Table of Contents
Advertisement
CAUTION
In the following step, use the
appropriate tool to avoid damage to
the seal or T-slot area of the valve.
4. Different valve types have different seal designs
and components. To see the appropriate seal, refer
to figure 5. Insert the appropriate tool under the top
edge of seal and gently pry the seal out. Take care
not to damage the seal or T-slot area of the valve
body. After the seal has been removed, clean the
T-slot area, retaining ring and, if required, polish the
disc thoroughly with fine steel wool or other
appropriate material.
Soft 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.
Before installing the seal ring into the valve body, the
backup ring (key 9) must first be placed onto the
wide, outer groove of the seal ring.
2. The seal ring and backup ring assembly must be
installed in the valve. The wider outside diameter of
the seal ring goes into the T-slot area of the valve
body, shown in figure 7. Start the wider diameter
edge of the seal ring into the T-slot of the valve body
using a blunt end screwdriver.
3. Carefully tuck the backup ring downward into the
valve body T-slot until the seal ring and back-up ring
are completely entrapped in the valve body T-slot.
All manuals and user guides at all-guides.com
4. When the seal is thoroughly seated, re-install the
retaining ring and screws. Tighten the retaining
screws just enough to eliminate vertical movement
of the retaining ring. With the use of the blunt end
tool, carefully tuck the lip of the seal ring under the
retaining ring.
5. When the seal is under the lip of the retaining
ring, tighten the screws according to standard
procedures. Manually rotate the valve shaft
clockwise 180_ to return the disc to its closed
position against the internal stop.
6. The final seating of the retaining ring screws can
now be done. For the screw torque values, refer to
table 6. The seal is now fully installed and the valve
may be closed for installation or storage.
Metal and Phoenix III Seal Installation
For metal seal installation:
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 (key 8) into the valve body by
first placing the wider outside diameter of the seal
ring into the T-slot area of the valve body which is
shown in figure 7. Metal seals without a back-up ring
will fall into place. Metal seals with a back-up ring
(key 9) will have to be installed following the
instructions given below for the Phoenix III seal with
back-up ring.
A11 Valve
11
Advertisement
Table of Contents
