API 682

• Pressure up to 20.7 bar (300 psi)
• Temperature -73°C to 427°C (-100°F to 800°F)
• Speed:
  • BXRH: up to 46 m/s (150 ft/s)
  • BXHHS: up to 23 m/s (75 ft/s)
• Shaft Sizes: 21.8 to 127 mm (0.857 to 5.073 inch)

• Optimal performance resulting from flexible graphite gasketing in lieu of elastomers to improve temperature and chemical compatibility 
• High uptime due to corrosion resistant Alloy 718 construction and low-stress bellows design 
• Ideal choice when high temperature dual seals are required due to the compact overall length designed to fit in API 610 seal chamber dimensions without pump modifications 
• Reliable operation ensured by extended travel bellows core that allows for extreme linear shaft growth, typical in high temperature pumping 
• Distortion free face design maintains face flatness throughout operating range  

• Arrangement 1 single seal (Common Piping Plans 11, 13, 23, 32, 62)
  • BXHHS
  • BXRH
• Arrangement 2 unpressurized dual wet seal (Common Piping Plans 52, 55)
  • BXXHS/BXHHS
  • BXRH/BXRH 
• Arrangement 2 unpressurized dual seal with dry running backup (Common Piping Plans 72, 75, 76)
  • BXHHS/GSDH
  • BXRH/GSDH
• Arrangement 3 pressurized dual wet seal (Common Piping Plans 53A, 53B, 53C, 54)
  • BXHHSB/BXHHS
  • BXHHS/BXHHS
  • BXRH/BXRH