[ID17x1.5mm]

O-ring Sealing Principles

O-rings are bi-directional seals, circular in shape and cross section. O-rings are generally
made of an elastomeric material, but may be made of other materials such as PTFE or
metal. An O-ring seals through the deformation of the seal material by installation and media pressure to close off the gap between mating components. Higher system pressures can cause deformation through the gap, known as extrusion, resulting in seal failure. Choosing a harder seal material or installing back-up rings to support the O-ring may alleviate this problem.

EPDM (Ethylene-Propylene-Diene Monomer O-Ring):

EPDM O-ring in auto parts, hygiene supplies, medical equipment, marine equipment, petroleum equipment, telecommunications equipment, instrumentation, machinery and other industrial fields are widely used.

Use temperature range: -50 to 150 °C

Application

The O-Ring is used predominantly Compatible with static sealing applications:
- As aradial static seal, e.g. Compatible with bushings, covers, pipes, cylinders
- As an axial static seal, e.g. Compatible with flanges, plates, caps.
O-Rings in dynamic applications are recommended only Compatible with moderate service conditions.They are limited by the speed and the pressure against which they are to seal:
- Forlow duty sealing of reciprocatingpistons, rods, plungers, etc.
- Compatible with sealing of slowlypivoting,r otating or spiral movements on shafts, spindles,rotary transmission leadthroughs, etc.