FBS(BB1)

The API BB1(model FBS) pump is a horizontally split, between-bearings centrifugal pump designed in accordance with API 610 / ISO 13709 standards . Its defining feature is an axially split casing, which allows the top half to be removed for internal inspection or rotor replacement without disturbing the suction and discharge piping or the driver . This configuration typically utilizes a single-stage, double-suction impeller that hydraulically balances axial thrust, contributing to low NPSH requirements and extended bearing life . The design is widely recognized for its robust construction and maintainability in heavy-duty continuous operations.

These pumps are engineered for high-flow, medium-to-high head applications, particularly in the petroleum, petrochemical, and power generation industries . Common services include crude oil pipeline transport, refinery charge and process pumps, boiler feed boosting, and large-scale cooling water circulation . The BB1’s hydraulic design is often customized to match specific pipeline profiles or process requirements, with some configurations capable of reverse operation as hydraulic power recovery turbines (HPRT).

Technically, the BB1 pump features a heavy-duty shaft with short bearing spans to minimize deflection, and renewable wear rings on both the casing and impeller to reduce lifecycle costs . The bearing housings are designed for oil-bath, mist, or grease lubrication and often include provisions for temperature and vibration monitoring . Modern designs frequently comply with API 682 seal chambers and offer a variety of impeller and casing materials to suit corrosive or high-temperature services . With flow capacities reaching up to 20,000 m³/h and heads up to 320 meters, the API BB1 remains a standard choice for critical, high-capacity pumping duties.