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5 Maintenance
This page is not applicable for ATEX applications.
For ATEX application see ATEX addendum
5.5.5 Hyclean single flushed/quench mechanical seal
Item
Description
79
Seal housing
81
Rotorcase O-ring
82
Wave spring
83
Stationary seal ring
84
Shaft O-ring
85
Rotary seal ring
86
Washer
87
Seal housing O-ring
88
Lip Seal
Seal removal:
1. Ensure the flush media is turned off and disconnect the flushing pipework.
2. Remove rotorcase cover, rotors and rotorcase.
3. Undo the seal housing screws and remove the seal housings (79) and lip seals (88).
4. Remove the stationary seal rings (83), seal housing O-rings (87) and wave springs (82) from the rotorcase.
5. Remove the rotorcase O-rings (81) from the rotorcase.
6. Remove the rotary seal rings (85), rubber washers (86) and shaft O-rings (84) from the shafts.
Seal fitting:
1. Lightly lubricate shaft O-rings (84) with appropriate grease and fit to shafts.
2. Lightly lubricate both sides of rubber washer (86) and fit to rotary seal rings (85) ensuring location under the drive pin.
3. Slide the rotary seal rings on to the shafts lining up pins to slots on the shafts.
4. Lightly lubricate rotorcase O-rings (81) with appropriate grease and fit to rotorcase.
5. Fit wave springs (82) into the rotorcase seal bores.
6. Press the stationary seal rings (83) into the rotorcase, lining up slots.
7. Lightly lubricate the lip seal outside diameter and press lip seals into seal housings (79).
8. Fit seal housing O-rings (87) to seal housings.
9. Fit seal housings to the rotorcase and tighten screws.
10. Push firmly on stationary seal faces to check they are still moving freely. If not, then they are not fitted correctly. Take
apart, re-lubricate and refit.
11. Wipe clean the sealing faces with solvent.
12. Refit the rotorcase, rotors and rotorcase cover.
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