Specification :

O - r i n g A p p l i c a t i o n s

The O-ring is one of the most popular seal choices because:

1. The O-ring is cost effective in purchase price and the cost to machine the seal
groove is relatively low.
2.As a bi-directional squeeze seal, the O-ring can be used in an extremely wide
variety of successful applications, both static and dynamic.
3.The O-ring material allows for maximum stretch or compression and is therefore
quite easy to install, generally requiring no special tools.

Applications:
Static:
There are four varieties of static
applications as noted below:

1. Axial
The O-ring cross section is squeezed
axially in the groove similar to a flat
gasket.
2. Radial
The O-ring cross section is squeezed
radially in the groove between the
inside ( ID) and outside ( OD) .
3. Dovetail
The O-ring is also axially squeezed in a
dovetail groove. The groove design
allows the O-ring to be retained in the
face seal during assembly and maintenance.
This is beneficial for special
applications where the O-ring has to
be fixed by the groove e.g. a lid which
opens regularly.
4. Boss Seals
The O-ring is used for sealing straight
thread tube fittings in a boss. A boss is
a cylindrical projection on a casting or
forging. The end of that projection is
machined to provide a flat, smooth
surface for sealing. Straight threads
used with an O-ring provide a better
seal than tapered threads used alone.

The material used consisted of:
NBR/ NITRILE RUBBER
HNBR/ HYDROGENATED -NBR
CR/ NEOPRENE
IIR/ BUTYL RUBBER
EPDM
FPM/ FKM/ FLUORO RUBBER
FFPM/ FFKM/ PERFLUORO
MVQ/ SILICONE
TPU/ POLYURETHANE RUBBER