Flowserve BXRH/BXHHS Metal Bellows Seal

Product Brand

Flowserve

Type

Mechanical Seals

SubType

Metal Bellows Seals

About this product

BXHHS and BXRH seals provide sealing capability at extreme temperatures in challenging refinery and petrochemical services. When pumping services push beyond temperature limits of elastomers, BXHHS and BXRH seals offer reliable sealing in both single and dual seal configurations. BXHHS and BXRH seals are fully compliant with API 682 Type C requirements.

Features and Benefits

• 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  

Specifications

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)

Configurations

• 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

Industries

Power

• Concentrated Solar Power (CSP)

Oil & Gas

• Downstream Processing