Emerson Fisher 8532 Instruction Manual page 20

8532 Valve
June 2017
2. Inspect all parts removed from the valve for wear or damage. Replace any worn or damaged parts. Clean the valve
body and all parts to be installed with an appropriate solvent or degreaser.
Note
When installing the bearings, apply lubricant to the outside diameter of the bearing for ease of installation.
CAUTION
Premature valve failure and loss of process control may result if bearings are improperly installed or are damaged during
installation.
3. When installing the lower bearings (key 4), insert one or more bearings into the lower shaft bearing bore so it is
flush with the body bore.
The number of bearings required changes with valve size and construction. Two bearings are required in the upper
shaft and two bearings in the lower shaft. If using an NPS 14 CL150 valve with metal bearings, four bearings in the
upper and four in the lower shaft will be required.
4. Hold the lower shaft thrust bearing (key 24) in the valve body bore against the counterbore of the lower shaft
bearing bore. Push the lower shaft into the bearing bore just enough to hold the thrust bearing.
5. When installing the upper bearing (key 7), insert one or more bearings into the upper shaft from the body bore into
the bearing bore below the packing box. Use caution to prevent damage to the bearing.
6. Hold the upper shaft thrust bearing (key 24) in the valve body bore against the counterbore of the upper shaft
bearing bore. Push the upper shaft through the packing box side into the bearing bore just enough to hold the
thrust bearing.
7. When installing the lower bearing (key 4), insert one or more bearings into the lower shaft bearing bore so it is flush
with the body bore.
8. Insert the lower shaft through the bore in the valve body uncovered by removal of the gasket retainer. Hold the
lower shaft thrust bearing (key 24) in the valve body bore against the counterbore of the lower shaft bearing bore.
Push the lower shaft into the bearing bore just enough to hold the thrust bearing.
CAUTION
To avoid damage to the disk, seal, and T‐slot area, do not force the disk past the seal or T‐slot area. Install the disk from the
opposite side of the valve body.
9. Place the flat side of the disk on a flat surface and insert wooden blocks to raise the disk approximately 51 mm
(2 inches) from the worktable surface. Then, suspend the valve body over the disk so the seal/T‐slot area is facing
up. Align the shaft bores through the disk with the upper shaft and lower shaft bores. Lower the valve body over the
disk using caution not to dislodge or damage the thrust bearings placed on the ends of the shafts.
10. With the disk (key 2) properly positioned in the valve body (key 1), push the upper shaft and lower shaft the rest of
the way through the thrust bearings and into the shaft bores in the valve disk.
11. Align the holes in the shafts with the holes in the disk.
20
Instruction Manual
D101550X012