Flowserve-Flowserve-Metal Bellows Seals - BXRH

Metal Bellows Seals - BXRH/BXHHS

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.

Product Highlights

Industries

Oil & Gas
Power

Industry Sectors

Downstream Processing
Concentrated Solar Power (CSP)

Standards

API 682

Operating Parameters

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)

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

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