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Type 1604

Single Stationary API 682/ISO 21049 Metal Bellows Cartridge Seal Type C, Arrangement 1

The Type 1604 high-temperature, high-performance Type C, Arrangement 1, API 682/ISO 21049 qualified cartridge seal is designed for high-temperature applications such as hot hydrocarbons and crude oil fractionation products. The Type 1604 utilizes a stationary Inconel 718 welded metal bellows with flexible carbon graphite secondary seals. The stationary mounted metal bellows seal is able to handle higher shaft speeds. The Type 1604 utilizes a segmented spring-loaded carbon throttle bushing for effective containment and can come equipped with a retained mating ring for vacuum service. The Type 1604 is often supported by an API Plan 62 quench (steam) and a steam guide for effectively routing of the steam to the seal faces to help eliminate any coke build-up that could occur when sealing hot hydrocarbons.

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Type 1604


  • High-performance John Crane edge-welded metal bellows
  • API 682/ISO 21049 Type C, Arrangement 1 qualification tested
  • Segmented spring-loaded carbon throttle bushing for effective containment
  • Steam guide for effective steam quench
  • Capable of high speeds to 10,000fpm/50m/s
  • Inconel bellows for corrosion resistance and high strength
  • Retained mating ring for vacuum service
  • Available with hard faces


Temperature Limits

-330°F to 800°F/-280°C to 425°C

Pressure Limits

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

Speed Limits


Recommended Applications

  • Process Pumps

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