Instruction Manual
D104016X012
8590 Valve
June 2017
19
CAUTION
Once the final preload torque is applied, do not loosen or remove the blind flange nuts (key 5). If nut removal is necessary,
a new gasket is required.
Soft Seal Installation
1. Locate the replacement seal ring (key 19) 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 7. Around the outside circumference is one wide
groove, as shown in figure 2.
Before installing the seal ring into the valve body, the backup ring (key 20) must first be placed onto the wide, outer
groove of the seal ring. Rotate the disk 180
_
from closed before installing the seal ring (shown in figure 8).
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 backup ring are
completely entrapped in the valve body T-slot. If installing for NPS 3, install the anti-extrusion ring per figure 2.
4. Place the retainer gasket (key 18) in the groove in the valve body.
5. When the seal and gasket are seated, install the seal retainer (key 16) and screws (key 17). Tighten the retainer
screws just enough to eliminate vertical movement of the seal retainer. With the use of the blunt end tool, carefully
tuck the lip of the seal ring under the seal retainer.
6. When the seal is under the lip of the seal retainer, tighten the screws according to table 7. Manually rotate the valve
shaft clockwise 180° to return the disk to its closed position.
Figure 10. Sectional of Typical Valve Body
ACTUATOR
END OF SHAFT
POSITION INDICATION MARK
INDICATES APPROXIMATE DISK POSITION
CCW DISK
ROTATION
TO OPEN
X2
X1
GE72464
