Appendix: B
Double Seal Assembly Instructions
F-750-025-A / rev 12.20 – ZCM- ZCHM Series Metric Manual
10
*Refer to Figure 11 for part numbers referenced within double seal assembly instructions.
The double seal-supplied pumps require sub-assembly of the stuffing box prior to installation
on the pump. Below are the steps required (Refer to Figure 10 and Figure 11):
1. Press the inboard stationary seal [2] into the inner cavity of the stuffing box [1]
(DX8307347)
2. Press the outboard stationary seal [7] into the gland [9] (DX8307337)
3. Prepare the shaft sleeve [3] (DX8307367):
(Refer to Figure 9)
a. With the flanged edge facing the inboard direction (toward the impeller) first
put the shaft sleeve through the seal face in step 1. Apply the inboard rotating
seal [4] onto the shaft sleeve with the use of temporary rubber emulsion
lubricant or clean water.
You must do this sideways as gravity will allow the
inboard seal face to drop out of the bellows.
b. Place the spring [5] onto the shaft sleeve and make sure it seats around the
inboard seal from step 3a.
c. Apply the outboard rotating seal [6] onto the shaft sleeve in the reverse direction
of the inboard seal again using temporary rubber emulsion lubricant or clean
water.
Figure 10: Double Seal
