Multi-stage and double suction OH4 in-line pump is our special design.
Low NPSHr and small installation space.
Casing:
Double suction for outlet larger than 100mm to balance radial force.
Cover for seals chamber can be designed as water cooling or heat keeping for pumping liquid where has temperature requirement.
Impellor:
For single stage single suction, axial thrust is balanced through balancing holes and rear wearings;
For double stage double suction, axial thrust is balanced through symmetrically arranged impellors.
Bearing:
Hydrodynamic auxiliary guide bearing to reduce pump vibration.
Easy maintenance:
Pump and driver are connected by spacer rigid coupling.
Windows on both sides for installation and removal of coupling and mechanical seal, and for adjusting motor center.
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.
