Volute casing:
Double volute to balance radial force.
Radially split to meet high pressure duty.
Rotor:
Impellor double suction or single suction to meet different flow.
Impellor one stage or symmetrically arranged two stages to meet different head.
Impellor dynamically balanced.
Rotor rigidly designed with reliable dynamic performace and low vibration.
Mechanical seal:
Controllable compressed gasket seal between cassing and cover & seal gland.
Seal chamber is designed for cartridge type of singel seal, double seal according to API682.
Bearings:
Radial bearings of rolling type or sliding type available.
Thrust bearings of ball-ball, ball-sliding, sliding-thrust disc types available.
Low temperature of lubrication oil and bearings.
Ring oil lubrication.
Pressure rating:
ANIS B16.5 Class 300 according to API610.
Higher pressure ratings available through special design and side suction-side discharge structure.
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.