 |
EXPANDING
RINGS are
used when the ring must contact the cylinder
bore and the ring groove is in the piston.
(Outward Tension) |
 |
CONTRACTING
RINGS are
used when the ring's I.D. must contact the
shaft or rod and the groove is in the housing.
(Inward Tension) |
 |
ONE
PIECE RINGS
are the least expensive type of sealing
rings and are available in many gap configurations.
|
 |
TWO
RING COMBINATION
offers better sealing characteristics than
a single ring. |
 |
THREE
RING COMBINATION
is used when positive sealing is required.
The inner ring effectively blocks leakage
at the outer ring gaps. |
 |
MARCEL
SPRINGS are
sometimes used to help seat the ring and
to dampen vibration. |
 |
PINNED
RINGS are
used in butterfly valve applications. |