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).
When to choose BB4? If your application requires high pressure but is within a stable range where a double-casing is not mandatory for safety, the Hefei Huasheng BB4 Pump is a robust and cost-effective choice.
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.
When to choose BB5? For critical services where safety is paramount and pressures are extreme, the Hefei Huasheng BB5 Pump is the industry standard. Its barrel design ensures that even if the inner casing leaks, the outer barrel contains the fluid.
Feature
BB4 Pump
BB5 Pump
Structure
Single-casing, Segmented (Ring Section)
Double-casing (Barrel Type)
Casing Split
Radial split
Radial split (Inner & Outer)
Pressure Rating
Medium to High Pressure
Ultra-High Pressure
Temperature
Standard High Temp
Extreme High Temp
Maintenance
Requires disassembly of segments
Cartridge pull-out (Easier for internal access)
Typical Cost
More Cost-Effective
Higher Initial Investment
Best Application
Boiler feed, Refineries, Chemical transfer
Hydrocracking, High-pressure injection
Our Models
[View BB4 Series ->]
[View BB5 Series ->]
Summary: Which One Should You Buy?
Choose BB4 if you need a reliable, high-pressure pump for standard refinery or boiler feed applications and want to optimize your budget.
Choose BB5 if your process involves dangerous fluids, extreme pressures, or requires the highest level of safety redundancy (Double Casing).
