Casing:
Design pressure 1.6MPa or 2.5MPa depends on different duties.
Filter at suction for pumping liquid filtration.
Impellor:
Axial thrust is balanced by balancing hole.
Multi-stage available for special duty.
Bearing:
Angular contact ball bearing built on shaft for easy adjusting of rotor axial position.
Grease lubrication with structure simple and reliable.
Guide bearings with different materials for different duties.
Lubrication through outsourcing clean liquid when handling liquid with foreign matters.
Mechanical seal:
No shaft seal in open system application. In close system or liquid volatile or toxic application, mechanical seal or gland packing are available.
Packing seal at sliding bearing bottom protects sliding bearing when liquid containing solids.
API610 Centrifugal Pumps
| Overhung (OH) | Flexibly coupled | Horizontal | Foot-mounted | OH1 |
| Horizontal | Centerline-supported | OH2 | ||
| Vertical | In-line with bearing bracket | OH3 | ||
| Rigidly coupled | Vertical | In-line | OH4 | |
| Between bearings (BB) | 1 & 2 stages | Axially split | Foot-mounted | BB1-A |
| Near-centerline mounted | BB1-B | |||
| Radially split | Centerline-supported | BB2 | ||
| Multistage | Axially split | Near-centerline supported | BB3 | |
| Radially split | Single casing | BB4 | ||
| Double casing | BB5 | |||
| Vertically suspended (VS) | Single casing | Discharge through column | -- | VS1 |
| Separate discharge pipe | Line shaft | VS4 | ||
| Cantilever shaft | VS5 | |||
| Double casing | Radially split | -- | VS6 |
**Some of above types of pumps does not meet all the requirements of API610 standard.
**API610 standard suggests that, further or differing requirements can be needed for individual applications. The vendor is necessary to identify any variations from API610 standard and provide details for alternative equipment or engineering solutions.
