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:
Rolling bearings in the upper bearing housing use back-to-back angle contact ball bearings, built on shaft for easy adjusting of rotor axial position.
Lower bearings use cylindrical roller bearings, lubricated with lithium-based grease.
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.
Easy maintenance:
Rotor components can be axially adjusted without removing any parts so that shortens shutdown maintenance time.
Open impeller, with front and rear wearing plate, only need to replace the wearing plate after parts are worn, so the maintenance and spare parts cost are reduced.
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.
