Hyd Sealing Flashcards
1
Q
5 sealing devices
A
Seals Packing ring(oring) Wiper ring Back up ring Maintenance sealing device
2
Q
What does wiper ring do?
A
Wiper ring keeps a rod clean
3
Q
Back up ring purpose
A
To support the seal by either enclosing seal (2 back up rings) or by single support (1 ring)
4
Q
2 ring profiles
A
O ring
U-lip
5
Q
Good practices with fitting packing
A
Ensure no sharp edges or threads contact the packing. So use plastic bag or packing bag to prevent this.
6
Q
One note with installing split scarffed rings
A
Ensure the stagger is not overlapping. So insure fitted correctly
