Type 28AT Dry Gas Seals | John Crane Mechanical Seals
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Type 28AT

ターボコンプレッサー用 非接触ガスシール

Type 28AT: The original gas seal, with a design pedigree stretching back over 30 years and evolving gradually, installed and proven in thousands of compressors all around the world and remaining the preferred seal choice for many customers. Type 28 compressor dry-running gas seals have been the industry standard since early 1970 for gas-handling turbomachinery. Utilizing John Crane’s patented spiral groove pattern, these seals are non-contacting in operation. During dynamic operation, the mating ring/seat and primary ring/face maintain a sealing gap of approximately 0.0002"/5 microns, thereby eliminating wear. These seals eliminate seal oil contamination and reduce maintenance costs and downtime. Single, tandem and double seal arrangements are available.

Find out about AURA™; the next generation of gas seals from John Crane >

Recherche de documents


  • California Residents: PROPOSITION 65 WARNING
  • Cartridge design
  • Unidirectional or bidirectional capability
  • Single, double-opposed or tandem configuration
  • Robust design with unparalleled field-proven pedigree

Note: John Crane may validate individual seals for applications outside one or more of the parameter limits.


Limites de température

-4 °F à 392 °F/-20 °C à 200 °C, en fonction des conditions d’utilisation générales

Limites de pression

1 450 psi(g)/100 bar(g)

Limites de vitesse

394 pi/s/120 m/s

Limites de taille

12,125 po/308 mm

Applications recommandées

  • Compresseurs centrifuges
  • Autres compresseurs
Fonctionne avec
Filtre gaz FCF
Filtre gaz FCF
PD 75 PD 75
Produits similaires
Type 28XP Type 28XP
Type 28EXP Type 28EXP
Type 28VL Type 28VL

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