How does the retaining ring in the seal work?


Release time:

2022-09-28

Under high-pressure conditions, O-rings are prone to being squeezed out of grooves, so retaining rings are added to improve sealing pressure capacity and prevent extrusion grooves, in order to protect the O-rings from compression and corresponding damage. This application has a wide range of applications in hydraulic and pneumatic systems.

Under high-pressure conditions, O-rings are prone to being squeezed out of grooves, so retaining rings are added to improve sealing pressure capacity and prevent extrusion grooves, in order to protect the O-rings from compression and corresponding damage. This application has a wide range of applications in hydraulic and pneumatic systems.
There are basically four common types of retaining rings:
Spiral retaining ring - for non separable designs
Solid retaining ring with notches (cuts) - for non separable designs
Sturdy retaining ring (uncut) - in high-pressure and high-temperature applications
Irregular retaining ring - used at 400 bar in critical applications (O-ring may deform severely)
Product advantages:
Both static and dynamic applications can be used
Used with piston and piston rod
Wide selection of materials
Easy to install and disassemble
Product application:
Retaining rings can be applied in various industries, especially in static mechanical and static sealing applications, such as various types of hydraulic cylinders, injection molding machines, mining equipment, ship hydraulics, loading platforms, cranes, and other heavy equipment.
General guidelines:
Whether a retaining ring is suitable depends on the hardness and compression of the O-ring, as well as whether the application is static or dynamic. The general guidelines are as follows:
Static:
Standard groove chamber, without retaining ring, can withstand pressure of 160bar
Pressure with retaining ring up to 400 bar
Equipped with a special support ring, with a maximum pressure of 2000bar
Dynamic:
No retaining ring, reciprocating motion up to 50 bar; High pressure belt retaining ring.