Mechanical Seals and Seal Support Systems
Metal Bellows Seals - BXRH/BXHHS
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
- Metal Components:
- 316 Stainless Steel
- Metal Bellows:
- Alloy 718
- Seal Faces:
- Silicon Carbide
- Carbon
- Gaskets:
- Flexible Graphite
- Size Range:
- 21.8 to 128.9 mm (0.857 to 5.073″)
- Pressure:
- up to 20.7 bar (300 psi)
- Temperature:
- -73 to 427°C
- Speed:
- up to 23 m/s (75 fps) BXHHS
- up to 46 m/s (150 fps) BXRH
Configurations
- Single seal
- BXHHS
- BXRH
- Dual seals
- BXHHS/BXHHS – unpressurized dual wet seal
- BXRH/BXRH – unpressurized dual wet seal
- BXHHS/GSDH – unpressurized dual seal with dry running backup
- BXRH/GSDH – unpressurized dual seal with dry running backup
- BXHHSB/BXHHS – pressurized dual wet seal
- BXRH/BXRH – pressurized dual wet seal
EN_GB 
PL