DESCRIPTION
The BT wiper offers a light load contact wiping lip, making these wipers suitable for light duty industrial hydraulic applications.  BT wipers are made from 90A urethane, and are used to replace K wipers in applications where conditions may be more severe. 
 
SEAL INFORMATION
Durometer (Shore A): 90  
Temperature Range (F): -40 TO 200  
Max Speed (ft/sec): 3.0  
Mating Surface Roughness - Ra (µin) - DYNAMIC: 3<>12  
Mating Surface Roughness - Ra (µin) - STATIC: 32 MAX  
Part Number Definition (Inch): BT(5-DIGIT NUMBER)  
Additional Part Number Definition (Inch): EX:   BT21080