O-ring - PU

PU (Polyurethane) elastomers are made of what is generally known as plastic.

PU O-rings are special sealing elements and are used where standard elastomeric O-rings are not adequate.
In suitable working conditions, PU O-rings can be used in very wide areas of application in hydraulic and pneumatic systems both in static and dynamic applications. PU O-rings are not recommended for rotary movements.

Because they take up less space and provide two-sided sealing compared with other sealing elements, O-rings make designing easier. Obtaining good results from O-ring applications depends on suitable measurements, choosing correct materials, and suitable surface quality on metal parts.

PROFIL



PRODUCT ADVANTAGES
• Can be used both for hydraulic and pneumatic systems
• Can be used both for static and dynamic applications
• Both for rod and piston applications
• Wide compound range
• Outstanding mechanical properties
• High tensile strength
• Low compression set
• Low friction
• Good service life
• Some compounds are approved for contact with foodstuffs
• Good resistance to ozone, ageing and weathering
• Easy installation and removal

APPLICATION
Used in almost in every industry but especially in non-moving machinery and in static sealing applications, e.g. as flange or cover seals but also as a dynamic sealing due to its outstanding mechanical properties. PUR O-rings are often found in pneumatic applications where low compression set and low friction are needed, or in applications that require frequent opening and closing, e.g. couplings and plug connectors.

INSTALLATION
O-rings are fitted into the groove by hand. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation all individual parts of the seal must be lubricated. Be sure not to use a lubricant that will cause deterioration of the seal.
Tolerances: DIN 3771 / ISO 3601

SPECIAL APPROVALS – FOOD-GRADE-QUALITY
We also stock specially approved materials for the food industry; EU 1935/2004, EU2023/2006 and FDA etc.
 
NOTES
PU O-rings are not suitable with ketones, esters, ethers, alcohols, glycols, hot water/steam, alkalis, amines, concentrated acids and lyes.