Flowserve Valtek Valdisk Control Valves - Manual (Page 7)

10-7
85
88
93
88
87
80
109
117
51
83
50
83
52
122
61
1
21
55
20/22
123
124
vided on the end of the shaft and on the lever arm should
be aligned.
2. Bolt the actuator yoke to the valve body. Be certain the
stroke indicator plate is positioned properly to accurately
indicate the valve's rotation.
3. Position the actuator lever arm on the shaft so the actuator
stem is centered in the transfer case. Firmly tighten the
linkage bolt, on clamping lever arm actuators.
CAUTION: On clamping lever-arm actuators, do not apply
air to the actuator without the cover plate installed; oth-
erwise, the unsupported shaft may sustain damage.
4. Adjust the actuator stroke stop bolts until the disc is parallel
to the seat surface, but not resting on body disk stop.
CAUTION: Actuator stroke stop bolts must be properly
adjusted to prevent the valve disc from overstroking. If
incorrectly adjusted the valve shaft may be twisted or
sheared off.
5. Install valve in line as outlined in ìInstallationî section.
Figure 5: Exploded Body Sub-Assembly
NOTE: Item numbers correspond directly to the bill of material. Refer to it for specific part numbers.
Item No. Description
1 body
20 hard seat
21 seat insert
22 seat retainer
50 disk
51 shaft
52 taper pins
55 seat gasket
61 O-ring
80 gland flange
83 shaft bearing
85 packing retainer
87 packing follower
88 packing
93 packing spacer
109 packing box stud
117 packing box nut
122 shaft plug
123 clip
124 screw
Gently press the snap-ring into the retainer until both the
retainer and snap-ring slip into the body. (Refer to Figure
1D.)
15. On early design Valdisk valves supplied with seat retainer
screws, install the insert and retainer into the body
with the disc open. Loosely install the retainer screws,
then close the disc. Tighten the screws after the closed
disc has centered the seat. This allows the seat to align
with the disc, permitting tight shutoff.
Remounting Actuator to Valve
Before mounting a Valtek actuator on the valve body, verify that
the disc rotation matches the actuator rotation and complies
with the air failure requirements. Procedure for mounting the
actuator is as follows:
1. Slide the entire actuator assembly onto the shaft. If neces-
sary on Valtek actuator designs with clamping lever arm
design, wedge the splined lever arm apart to loosen it on
the shaft splines. For full rotation of the disc, marks pro-