Instruction manual

Instruction Manual
D500248X012
A31D Valve
April 2014
14
2. Install the seal ring and O-ring assembly in the valve body. The wider outside diameter of the seal ring, as marked in
figure 5, goes into the T-slot area of the body. Start the edge with the wider diameter into the T-slot of the valve
body using a blunt-end tool.
3. Carefully tuck the O-ring downward into the body T-slot until the seal ring is completely entrapped in the body
T-slot, and it completely covers the backup O-ring.
4. Re-install the retaining ring and the socket head cap screws. Tighten the cap screws just enough to eliminate any
movement of the retaining ring. Do not over-tighten the retaining ring screws. Using a 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, continue to tighten the cap screws according to standard
procedures. Do not fully torque screws at this time. Final tightening of screws is accomplished in step 7 of this
procedure.
6. Manually rotate the drive shaft clockwise 180 degrees to return the disk (key 2) to its closed position.
7. The final seating of the retaining ring cap screws can now be done. For the screw torque values, refer to table 5. The
seal is now fully installed. Refer to the Installation procedures in this manual.
NOVEX, Phoenix III and/or Phoenix III Fire-Tested Seals
1. Locate the replacement seal ring (key 5) and note the shape of the ring. The ring is wider across one edge diameter
andnarroweracrosstheotheredgediameterasshowninfigure5.Aroundtheoutsidecircumferenceisonewide
groove.
Install the seal ring (key 5) in 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 2.
The backup O-ring (key 6) for the Phoenix III seal will have to be installed after placement of the seal ring in the valve
body using a blunt-end tool. Do not use the seal tool directly on the metal seat. Use tools on the O-ring only.
2. With the seal ring inserted all the way around the body T-slot now lay the O-ring into the opening between the valve
body and the seal ring. Use the seal tool to apply pressure to the O-ring and carefully tuck the O-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 you push the O-ring into the T-slot.
3. Once the seal ring and backup O-ring have been fully installed into the body T-slot, the retaining ring gasket can be
installed. This gasket is a thin graphite material. Punch one initial screw hole through the gasket for alignment,
being careful not to cause additional damage to the gasket.
CAUTION
The retaining ring gasket is a thin graphite material. When you punch one initial screw hole through the gasket for
alignment, be careful not to cause additional damage to the gasket.
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 the valve body.
5. Tighten the retaining ring socket head cap screws just enough to eliminate any movement of the retaining ring. Do
not over-tighten the retaining ring screws.