The multi stage pump parts are very similar to those of the standard Centrifugal pump except for the Multistage Centrifugal pump where the additional parts are diffusers which efficiently channel the fluid into the eye of the impeller or to the following stage. In the side channel pump, there are intermediate plates with the scalloped side channel and liquid parts. In multi stage centrifugal pumps, because of the high thrust that is generated due to the impellers facing in the same direction, there will be a thrust balance device i.e balance disc or balance drum which reduces the thrust to a level which can be managed by a standard sized thrust bearing.
Send InquiryChat NowThe multi stage pump parts are very similar to those of the standard Centrifugal pump except for the Multistage Centrifugal pump where the additional parts are diffusers which efficiently channel the fluid into the eye of the impeller or to the following stage. In the side channel pump, there are intermediate plates with the scalloped side channel and liquid parts.
In multi stage centrifugal pumps, because of the high thrust that is generated due to the impellers facing in the same direction, there will be a thrust balance device i.e balance disc or balance drum which reduces the thrust to a level which can be managed by a standard sized thrust bearing.
| Model No | Flow rate (m3/h) | Head (m) | Speed （RPM) | Shaft power (kW) | NPSHr(m) |
| D25-50X3 | 15-28 | 154-144 | 2950 | 14.3-20.3 | 2.4-2.8 |
| D25-50X4 | 15-28 | 206-192 | 2950 | 19.1-27.1 | 2.4-2.8 |
| D46-30X2 | 30-55 | 68-54 | 2950 | 8.68-11.89 | 2.4-4.6 |
| D46-30X3 | 30-55 | 102-81 | 2950 | 13.02-17.84 | 2.4-4.6 |
| D46-30X4 | 30-55 | 136-108 | 2950 | 17.36-23.79 | 2.4-4.6 |
| D85-45X2 | 55-100 | 102-78 | 2950 | 24.25-30.35 | 3.2-5.2 |
| D85-45X3 | 55-100 | 153-117 | 2950 | 36.38-45.52 | 3.2-5.2 |
| D120-50X3 | 96-140 | 165-126.9 | 2950 | 59.09-71.68 | 3.2-6.7 |
A multistage pump operates by one impeller feeding into the next impeller and the number of impellers required depend on the discharge pressure requirement. Liquid enters the pump and then passes through the various number of impellers in a sequence from the left to right.
The applications for multi stage pumps are many and varied and can be used for delivering water to high rise buildings, reverse osmosis (RO), boiler feed water, spraying, high pressure cleaning, water works, heating, condensate, fuel delivery, oil and gas production, power generation & mining and other high pressure and temperature applications.
A single stage pump uses one impeller whereas a multi stage pump uses 2 or more impellers (some manufacturers use 80 or more impellers).
There are additional components in a multi stage pump which are required for channelling the fluid from the first stage to the following stage i.e diffusers.
Multi stage pumps have a thrust balance device and there may also be intermediate bearings (lubricated by the pumpage) to steady the shaft plus other minor differences.
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