ITT Goulds Pumps 3409, Инструкция по установке, эксплуатации и обслуживанию

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adjustable ring can be moved axially by rotating it in either direction. The ring is held in position by a
stainless steel locking pin. All rings have clockwise threads.
126
127
Stationary
445A 100 101
127
Adjustable
Figure 31: Adjustable wear rings
6.6.2.1 Adjust the wear rings
If the clearance between the impeller wear face and the adjustable wear ring becomes excessive, then
do the following:
1. Remove the upper half of the casing and pull out the locking pin.
2. Rotate the inner rings clockwise to restore 0.005–0.008 in. (0.13–0.20 mm) of clearance greater
than the shaft-end float between the ring and the impeller.
3. Drill a new hole in the inner ring for the locking pin.
This is a blind hole. Do not drill all the way through.
4. Replace the locking pin and upper half of the casing.
6.6.2.2 Replace the wear rings
Adjustable rings are removed in the same manner as standard casing rings. They can be separated for
cleaning. Adjustable rings are installed in the pump with stationary and the adjustable members that are
assembled but not pinned.
1. Turn the adjustable member counterclockwise to provide maximum impeller clearance and slide
over the shaft ends.
The rings can be adjusted with the rotating element in the pump. Make sure that the stationary
member has its flange flush against the lower half of the casing.
2. Move the rotating element toward the outboard end as far as the bearings permit.
3. Screw the outboard-end adjustable ring toward the impeller to obtain 0.005–0.008 in. (0.13–0.20
mm) of axial impeller clearance.
4. Drill through the stationary ring hole into the adjustable ring and insert the locking pin.
5. Move the rotating element toward the coupling and set the coupling-end ring in the same manner.
6.6 Preassembly
Model 3409 Installation, Operation, and Maintenance Manual 47