API610 BB4 Ring Section Multistage Centrifugal Pump
This API610 BB4 type pump is a multistage, ring section centrifugal pump ideal for boiler feed water and other high-pressure applications. Its design adheres to API610 standards, ensuring reliability and performance in demanding industrial environments.





Technical Specifications
Product Overview
High-Performance API610 BB4 Multistage Pump
The MS series is a horizontal multi-stage, ring section, radial split centrifugal pump designed strictly to API610 BB4 standards. Engineered for heavy-duty industrial applications, it features a between-bearings design that ensures stability and reliability under high-pressure conditions. This pump is ideal for critical processes including boiler feed water, condensate systems, and de-scaling in demanding industrial environments.
Performance Ratings
Performance Metrics
Technical Standards
- Compliance & Standards
- API610BB4 TypeAPI682 SealingAPI Q1 Registered
Design Features
Hydraulic & Rotor Design
- Radial diffuser casing structure
- First-stage impeller optimized for anti-cavitation
- Secondary-stage impellers optimized for high efficiency
- Dynamically balanced rotor for running stability
- Axial force balanced via balancing drum and bush
Mechanical Components
Bearings & Sealing
| Component | Description |
|---|---|
| Sealing System | API 682 compliant; options for cartridge or double mechanical seals |
| Radial Bearings | Radial roller bearings to withstand radial loads |
| Thrust Bearings | Face-to-face angular conical roller bearings for shaft load capacity |
| Lubrication | Choice of self-lubrication (thin oil) or forced lubrication systems |
| Protection | Labyrinth bearing covers to prevent dust entry and oil leakage |

Application Fields
Suitable Applications
Model Identification
Model Identification Guide
| Code | Definition |
|---|---|
| BMS | Pump Model Series |
| 40-180 | Discharge Diameter |
| B | Nominal Impeller Diameter |
| 6 | Hydraulic Category |
| Z | Stage Number |
| Z (Suffix) | Auto Lubrication Sleeve Bearing |
| Q (Suffix) | Forced Lubrication Sleeve Bearing |

Construction Materials
Material Specifications
- High hardness materials for wearing rings and inter-stage bushings
- Optional surface hardening for solid particle handling
- Center line or foot support options based on temperature requirements



