This website uses cookies to ensure users have the best online experience. By continuing to browse this website, you are giving your consent to the use of cookies. To learn more, read our privacy policy. X
< Back to Metal Bellow Seals

Type 680

Low-temperature, General Duty All-Alloy-20 Edge-welded Metal Bellows Seal

The Type 680 is the ideal seal for general-purpose applications. Its rotating Alloy-20 bellows provide corrosion resistance in a broad range of corrosive media. Its cost-effective design, combined with a reliable performance history, has made the Type 680 a standard for low-temperature applications found in the chemical, water and wastewater, pulp and paper, and utility industries. The seal is available with hard faces for abrasive applications and a wide range of elastomers to cover a broad range of applications.

View complete list of product documents in all languages >
680 lg


  • Static secondary seal available in single or dual arrangements, shaft-mounted or in a cartridge
  • Manufactured with a 45-degree tilt edge at the bellows' inside diameter to disperse stresses and maximize operating life.
  • Superior nesting ripple plate shape with a three-sweep radius; this plate design allows the bellows device to be flexed repeatedly without the metal being stressed beyond its endurance limit.
  • Self-cleaning design — rotating bellows throw off suspended particles that clog spring-type seals. This self-cleaning action eliminates the need for external flushing, filters or cyclone separators and their associated costs.
  • World-class bellows manufacture — our bellows production facility has an outstanding manufacturing process with state-of-the-art stamping, welding and testing technology.
  • The bellows incorporate all of the design features resulting from key engineering competencies, such as metallic thin shell methodology, tribology and fluid sealing technology, and thin film/fluid mechanics


Standard Materials

Carbon face: To 200C/400F

Tungsten Carbide or Silicon Carbide face: 150C/300F

Pressure Limits

Vacuum to 360 psi(g)/25 bar(g)

Speed Limits


Recommended Applications

  • Process Pumps
  • Other Compressors
  • Other Rotating Equipment

I have a question about the [Product Name]:

{0} must be filled in.
{0} must be filled in.
{0} must be filled in.
{0} must be filled in.
{0} must be filled in.