| Comparison Item |
Rotary Jet Pump |
Multi-Stage Centrifugal Pump |
High-Speed Centrifugal Pump |
| Structure |
Single-stage pump, simple structure, few parts, small size |
Complex structure, many parts, large footprint |
Single-stage pump, requires gearbox for speed increase |
| Performance Parameters and Energy Consumption |
High efficiency, energy-saving, small supporting power; flow-head curve is relatively flat, capable of running in the entire flow range |
High energy consumption, large supporting power; steep drop in the flow-head curve, prone to pump damage at low flow rates, susceptible to cavitation at high flow rates |
High energy consumption, large supporting power; steep drop in the flow-head curve, prone to pump damage at low flow rates, susceptible to cavitation at high flow rates |
| Noise, Vibration |
Stable flow and pressure, low noise, and vibration |
Flow and pressure prone to fluctuations, high noise, and vibration |
Flow and pressure prone to fluctuations, high noise, and vibration |
| Maintenance |
Virtually maintenance-free, significantly saving on later maintenance costs |
High maintenance costs, requires maintenance almost every quarter |
High failure rate, high maintenance costs, frequent damage to mechanical seals, bearings |
| Pressure |
Stable flow and pressure, no pressure drop issues |
Many wearing parts, prone to pressure drop issues |
Wear and tear on sealing rings, impellers, prone to pressure drop |
| Sealing |
Adopts (single-end) hard alloy mechanical seal, with the seal at the low-pressure inlet, no dynamic seal at the high-pressure end, ensuring reliable sealing with no leakage |
Uses packing or mechanical seals, with the seal at the high-pressure end, seals are prone to failure |
Uses mechanical seals, with the seal at the high-pressure end, seals are prone to failure |
| Conveying Medium |
Can convey clear liquids and liquids with solid particles |
Suitable for conveying clean liquids |
Suitable for conveying clean liquids |
| Cavitation Performance |
Good cavitation resistance, can operate with some air, with a slight decrease in flow and head depending on the air content |
Poor cavitation resistance, liquid aeration easily leads to cavitation, and the pump cannot prime |
Poor cavitation resistance, liquid aeration easily leads to cavitation, and the pump cannot prime |
| Common Failure Scenarios |
Virtually maintenance-free, minimal vulnerable parts |
High axial force, frequent damage to mechanical seals, wearing of sealing rings, impellers |
High-speed operation, frequent damage to mechanical seals, bearings, gears |
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