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HBY buffer ring is made up of high performance 93 shore A PU and POM support ring. It is used as a primary sealing element in hydraulic cylinders. Therefore, it should be absolutely used in combination with another sealing element.  It has got a structure providing solutions to many problems in hydraulic cylinders such as shock pressure, back pressure etc. 

Technical Data    
Pressure:  400 Bar    
Temperature: -35  to +100     
Speed: 0.5m/s     
Media: Hydraulic oils (mineral oil-based)     
Material: PU          Back-up ring: POM       
Hardness: 93 2 Shore A     
Color: Light yellow   Back-up ring: Black      
Unusually high wear resistance    
Insensibility yagainst shock loads and pressure peaks    
Low compression set    
Increased sealing performance at zero pressure    
Easy installation    

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