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Chesterton 491 DIN Rotary Internal Single Seal (Global)

Chesterton 491 DIN Rotary Internal Single Seal (Global)


MS (Mechanical Seal)



Monolithic seal faces


Non-clog isolated springs

Dynamic O-Ri​ng is positioned on a replaceable component surface

Fits EN12756 L1K dimension

Detail :

General Purpose, Single Component Seal
​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​This high-performance, single rotary seal is capable of addressing a wide variety of applications.

The Chesterton ​491 can be run against many different stationary seal rings for maximum flexibility in many applications. The non-fretting design will not destroy the shaft sleeve or any metal parts. The 491 has a balanced O-Ring design with anti-clog features, springs out of the fluid, dynamic O-Ring moves on a clean surface.

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