Flowserve BX 150 - Manual (Page 6)

37-6
15. Rotate disc several times to allow seat to self-cen-
ter in the body. Again, check packing box nuts to be
certain they are tight, per step number 13. Do not
overtighten.
CAUTION: Do not over tighten packing box
nuts. This can cause excessive packing wear
and high shaft friction, which may impede shaft
rotation.
16. After the valve is fully assembled and seat leak
tested, use a compatible welding rod to tackweld
the taper pin to the disc at its thickest end. Later,
this will allow the taper pin to be removed after the
weld has been ground off.
Remounting Valve to Actuator
Before mounting a Valdisk 150 valve to a Valtek actua-
tor, verify that the disc rotation matches the actuator
rotation and complies with the air failure requirements.
Procedures for mounting the actuator are as follows.
1. Slide the entire actuator assembly onto the shaft.
To ensure full rotation of the disc, marks provided
on the end of the valve shaft and on the actuator
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. Adjust the actuator stroke stop bolts until the disc is
parallel to the seat surface.
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.
4. Install the valve in line as outlined in the “Installa-
tion” section.
82
83
50
82
84
52
117
80
87
109
113*
114*
88
85
51
1
25
21
22
26
26
26
27
Figure 4: Exploded Body Sub-assembly
Item No. Description
1 body
21 seat insert
22 seat retainer
25 retainer O-ring
26 fire-safe gasket**
27 fire-safe seal**
50 disc
51 shaft
52 taper pin
80 gland flange
82 thrust washer
83 shaft bearing
84 shaft bearing
85 packing retainer
87 packing follower
88 packing
109 packing box stud
113 jam nut*
114 washer*
117 packing box nut
* 1 thru 6-inch only
** Fire-safe designs only