John Crane Type 8B-1 Replacement

FAS Type Y1

John Crane Type 8B-1 Replacement


Technical Features

  • Balanced
  • Multi-spring
  • Bi-directional
  • Dynamic O-ring



  • Rotary faces: Carbon Graphite, Silicon Carbide, Tungsten Carbide
  • Stationary seats: Ceramic, Silicon Carbide, Tungsten Carbide
  • O-rings: Buna, Viton, EPDM, Aflas, Neoprene
  • Metallurgy: 316 SS with Hastelloy C™ springs

Operating Conditions

Dimensions:0.500” – 4.000”
Max Pressure:435 PSI / 30 BAR
Max Temperature:160°C – 320°F
Velocity:25 M/S – 4500 FPM

John Crane Type 8B-1 Replacement Chart Flex-A-Seal John Crane Type 8B-1


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