O-rings are perhaps the most common component used in sealing
applications. From the design of machineries to production, its use is
extensively found in household appliances, hydraulic and pneumatic
cylinders, heavy equipment, mining and agricultural, pharmaceuticals and
drugs as well as oil and gas and aerospace industries.
The cross sectional area diameter along with its internal diameter define
the size of an o-ring. Accuracy is important in the choice of an o-ring, and
upon installation, the o-ring should fit within close tolerance inside the
groove of the mounting. The contact area between the mounting and the o-ring
should facilitate an even distribution of pressure throughout, and for that
to happen, it is critical for the contact surface of the mounting to be
even. The fluid pressure that is contained should not exceed the pressure
along the contact surface between the o-ring and the surface of the mounting
under compression. This is necessary for the prevention of fluid leakage and
maintaining the integrity of the seal. The design criteria of the seal
should take into consideration the size and shape of the mounting along with
an accurate size selection for the o-ring. An o-ring size that is
incompatible with the mounting will compromise the integrity of the seal.
O-rings and seals are designed to perform within expectations under harsh
conditions such as temperature extremes and aggressive chemical media.
Production downtime, cost to the environment as well as factory safety are
some of the results of design failure.
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