Back-up ring - BU5 (uncut)

POM (Polyoxymethylene), also known as Acetal, is an engineering thermoplastic.
Back-up rings are primarily used in combination with O-rings to support the O-rings from extrusion. The back-up rings reduce the gap and prevent the O-ring from being pushed into the gap and damaged.
Back-up rings allow O-rings to run in high pressure applications, and they can be used both in static and dynamic applications. Back-up rings are cheap and simple sealing elements with a very wide area of application in hydraulic and pneumatic systems.

PROFILE

Compact back-up ring without slit (uncut).

PRODUCT ADVANTAGES
• Can be used both for static and dynamic applications
• Used for rods and pistons
• Wide compound range
• Wide range of dimensions
• Easy installation and removal

APPLICATION
Used in almost every industry but especially in non-moving machinery and in static sealing applications.
All types of hydraulic cylinders, injection moulding machines, mining equipment, marine hydraulics, loading platforms, cranes and heavy duty applications.

INSTALLATION
Easily assembled into the housing by hand. This back-up ring is in non split form. In case of a difficulty during installation the back-up ring can be cut carefully at a 30° angle and assembled afterwards. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the back-up ring must be oiled with system oil.

NOTES
For applications where the pressure changes from side to side a back-up ring should be mounted on both sides of the O-ring. For special applications POM back-up rings can be produced on requests.
Back-up rings are available in the following materials according to the use, temperature and media to which the seal is exposed.

• POM
• PUR
• PTFE
• PTFE/Glass
• PTFE/Modified
• PTFE/Carbon
• PTFE/Bronze
• PTFE/Graphite
• PEEK

For further information about back-up rings, please call us.