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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.



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680 lg

Features

  • California Residents: PROPOSITION 65 WARNING
  • 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

Parameters

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

5000fpm/25m/s

Recommended Applications

  • Process Pumps
  • Other Compressors
  • Other Rotating Equipment

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