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5 Maintenance
This page is not applicable for ATEX applications.
For ATEX application see ATEX addendum
5.5.2 R90 Single flushed/quench mechanical seal
Item
Description
71
Stationary seal ring O-ring
72
Stationary seal ring
73
Rotary seal ring O-ring
74
Rotary seal ring assembly
75
Seal housing O-ring
76
Seal housing lip seal
77
Spacer O-ring
77a
Spacer
79
Seal housing
The Rotary Seal Assembly (74) comprises of rotary seal ring,
washer (98), wave spring (99), drive ring (100) and grub screw (78)
Seal removal:
1. Ensure the flush media is turned off and disconnect the flushing pipework.
2. Remove rotorcase cover and rotors.
3. Remove the seal housing nuts and separate the seal housings (79) from the rotorcase.
4. Remove the rotorcase.
5. Extract the seal housing O-ring/gasket (75), stationary seal ring (72) and O-ring (71) from the rotorcase.
6. Remove the seal housing and extract the lip seal (76) using a screwdriver or lever taking care not to damage the seal housing.
7. Remove the rotary seal assembly (74) from the shaft by loosening the grub screws (78).
8. Slide off shaft the abutment spacer (77A).
9. Extract the rotary seal O-ring (73) from the rotary seal assembly.
Seal fitting:
1. Lightly lubricate O-rings (71) with appropriate grease and fit to stationary seal rings (72)
2. Press the stationary seal rings into the rotorcase seal bores by aligning cut outs with the anti-rotation pins.
3. Wipe clean the stationary seal faces with solvent.
4. Lightly lubricate lip seal (76) and seal housing bore with appropriate grease.
5. Press lip seals into seal housings (79).
6. Lightly lubricate spacer O-ring (77) and fit into groove in spacer (77A).
7. Lightly lubricate shafts and fit spacer pressing them over shafts against the shaft shoulder.
8. Slide seal housing over spacer (for SRU1-3 only).
9. Lightly lubricate O-rings (73) and fit to rotary seal ring (74).
10. Adjust rotary seal assembly grub screws (78) to ensure that screws do not foul on shafts when fitted.
11. Slide rotary seal assemblies on to the shafts up to the spacers.
12. Tighten the grub screws to the recommended torque figure in table 6.1.3..
13. Wipe clean the rotary sealing faces with solvent.
14. Fit O-ring/gasket (75) into rotorcase bores.
15. For SRU4-6 only, fit seal housings with retaining nuts and washers to back of rotorcase and refit the rotorcase.
16. For SRU1-3 only, carefully align all 8 studs and pull seal housings on to the 4 seal housing studs with retaining nuts
and washers to back of rotorcase and refit the rotorcase.
17. Refit the rotors and rotorcase cover
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Содержание SRU series
Страница 1: ...ESE00693 EN14 2017 09 Original manual Instruction Manual Rotary Lobe Pumps SRU Range ...
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