Metal Bellow shaft Seals replace John Crane 609

Compared to the traditional pusher seal, metal bellow seal can address the issue of chemical corrosion on the rubber.

The GW 688 replaces conventional pusher seals by incorporating a durable edge-welded metal bellows that eliminates dynamic elastomers, providing superior resistance to chemical attack and thermal degradation. The bellows assembly transmits torque directly through its welded plates, maintaining precise face loading while compensating for shaft misalignment, wear, and thermal expansion.

This balanced seal design features a stationary bellows configuration that minimizes flexural stress during operation, significantly extending service life in high-speed applications. The innovative notch geometry and drive band mechanism distribute mechanical loads evenly, preventing stress concentration and protecting shaft components from wear. The seal complies with international dimensional standards including EN 12756 (DIN 24960) for broad interchangeability.