Actuator Mounting; Determining Mounting Position; Determining Closed Position - Fisher Design V260 Instruction Manual

Table 3. Torque Values
VALVE BODY HEX NUT
VALVE
(KEY 3)
SIZE,
SIZE,
INCHES
NSm
8 746
10 990
12 990
16 1750
20 3470
22. Lubricate and install the seal assembly O-ring
(key 7) in the groove of the seal as shown in figure 6.
23. Install the wave spring (key 8) over the end of the
seal (key 17 or 9). Note that the spring is not required
with the attenuator dome (key 28, figure 6).
24. For single seal constructions, place the seal ring
assembly into the tailpiece, taking care not to damage
the O-ring (key 7) while sliding it into the tailpiece.
Also, be careful to protect all sealing surfaces.
For dual seal constructions, place the seal assembly
(key 17) into the dome, dome spacer and tailpiece.
25. Lift the second tailpiece assembly and align it with
the valve body studs and pins. Slide the tailpiece onto
the studs and bearing plate pins. The groove pins in
the valve body should be guided into the pin holes in
the tailpiece. Pull it up tightly, taking care not to dam-
age the tailpiece O-ring as it is pulled into the valve
body.
MOUNTING FLANGE
HEX NUT (KEY 23)
lbf-ft NSm lbf-ft
550
730
271 271 200 200
730
1290 746 550
2560 990 730
26. Install the hex nuts (key 19) on the studs (key 3)
and hand-tighten them. Torque all the hex nuts evenly
to the values shown in table 3.
27. Refer to the Packing Maintenance section to
install the packing parts.

Actuator Mounting

Use the appropriate actuator instruction manual when
mounting the actuator or changing actuator styles and
positions.

Determining Mounting Position

The actuator can be either right- or left-hand mounted.
D Right-hand mounting means that
the actuator is mounted on the right side
of the valve when viewed from the valve
inlet.
D Left-hand mounting means that the
actuator is mounted on the left side of
the valve when viewed from the valve
inlet.
Right- or left-hand mounting can change the actuator
action from push-down-to-close to push-down-to-open,
or vice-versa.

Determining Closed Position

1. You must remove the valve from the pipeline to
check the position of the ball.
2. Adjust the actuator linkage or travel stops as de-
scribed in the actuator instruction manual. Adjust the
actuator so that the valve ball will be fully open or
closed when the actuator is at the end of its stroke,
depending on the actuator action selected.
Design V260
Note
9