Type 676 John crane
Type 676 John crane

Features mechanical seal type 676

  • 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.

Features mechanical seal type 676

  • 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 Sealol® 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.

About Mechanical seal type 676

The Type 676, with a rotating AM350 stainless steel bellows, is well suited for mild corrosive and abrasive applications. Available with hard faces for abrasive applications and a wide variety of secondary seals that cover a broad range of applications.

Design Features mechanical seal type 676

  • Edge-welded metal bellows
  • Static secondary seal
  • Standard components
  • Available in single or dual arrangements,
    shaft-mounted or in a cartridge
  • The Type 676 meets API 682 requirements

Material mechanical seal type 676

  • Bellows: AM350 SS (UNS S35000)
  • End-fittings: 316L SS (UNS S31603)
  • Insert/primary ring: Premium carbon grade tungsten carbide, silicon carbide
  • Static seals: Fluorocarbon, EPR, PTFe-encapsulated fluorocarbon, nitrile, perfluoroelastomer

Operating range mechanical seal type 676

Temperature Limits-100°F to 400°F/-75°C to 200°C
Pressure LimitsVacuum to 360 psi(g)/25 bar(g)
Speed Limits5000fpm/25m/s


Product Description type 676

AM350 low-temperature bellows assembly for large sizes and mildly corrosive applications.

Recommended Applications type 676

  • Process pumps
  • Other compressors
  • Other rotating equipment