Sulzer BBT/BBT-D Process Two-Stage Centrifugal Pumps

Two-stage centrifugal pumps are used in applications where higher head is required. They ensure more reliable, high efficiency process and lower operating costs instead of serial pumping system.

The BBT/BBT-D 2 stage, radially split ISO 13709 / API 610 Type BB2 pumps offers the widest range of hydraulic performance in the industry. The BBT-D double suction impeller provides reduced NPSH3 for tough services in refineries and other critical applications.

Main benefits

Centerline support for reduced thermally induced misalignment
BBT-D double-suction impeller for low Net Positive Suction Head (NPSH)
First critical speed is well above operating speed range for smooth operation
Casing designed for 2x API 610 nozzle loads for freedom from piping distortions
Grouted or ungrouted, 1x or 2x nozzle load baseplates for reduced installation cost
Main applications

Unit charge
Atmospheric or vacuum bottoms retrofits where Net Positive Suction Head Available (NPSHa) is limited
Fractionator bottoms
Coker heater charge
Boiler feed booster
Main design features

Centerline supported casing with top / top nozzles
Thermal expansion features
Staggered-vane double-suction impeller on larger sizes
Proven coke crusher option
Sulzer Metco SUME coatings for abrasion resistance

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