What is the Structural Differences between BB4 and BB5 pumps

When it comes to pumps in industrial applications, understanding the differences between various types is crucial for making the right selection. In this blog post, we will explore the disparities between BB4 and BB5 pumps, two common types in the industry.

Hefei Huasheng BB4 Pumps

BB4 pumps are single - casing, segmented, and horizontally multi - stage centrifugal pumps with the impellers arranged in the same direction. They are designed according to the API610 standard for the oil, heavy chemical, and gas industries. The horizontal center - line support of BB4 pumps helps in better stability during operation. The casing of BB4 pumps is of a single - shell design. This design makes them relatively more straightforward in construction compared to some other models. For example, the flange of BB4 pumps complies with ANSI/DIN/ISO standards, and the mechanical seal cavity dimensions are in line with ISO21049 (API682).

Hefei Huasheng BB5 Pumps

BB5 pumps, on the other hand, are double - casing, specifically barrel - type pumps. They are also multi - stage and horizontally installed with a radial or axial split inner casing and two - end support. The double - casing design of BB5 pumps provides an extra layer of protection and is more suitable for applications where high - pressure and high - temperature conditions are prevalent. These pumps meet the stringent specifications of API Standard 610 latest edition. The outer barrel casing of BB5 pumps is heavy - duty, which can withstand high internal pressures.