21J

It’s a rubber bellow seal, whose rotating part is driven by friction between the shaft and the inner diameter of the rubber bellow. Suitable for handling light chemicals ranging from water and steam to weak acids. Intermeshing drive band design for better torque transmission.
 
Seal Characteristics
Single Acting
Internal or External Mounted
Dependent of Direction of Rotation
Unbalanced
 
Operating Limits
Shaft Diameter    : 10….100mm
Pressure        : 12 Bar
Temperature    : -30° to 180° C
 
Materials
Rotary Face : Carbon/SiC/TC/SS/Stellite
Stationary Seat : Ceramic/Carbon/TC/SiC/SS/Stellite
Elastomer : NBR/EPDM/Viton/Silicon