A multistage pump is a highly efficient fluid conveying device that achieves pressure boosting through multiple serially connected impellers. Its core characteristic lies in the multistage impeller structure (typically two or more), where each impeller incrementally elevates liquid pressure, ultimately achieving ultra-high head (more than 1000 meters), far exceeding the head limit of single-stage pumps (approximately 125 meters). With a compact structure and modular design (including components such as inlet section, middle section, and outlet section), the pump is often equipped with mechanical seals or soft packing seals at the shaft seal to minimize leakage risks. In terms of performance, multistage pumps combine high head with energy efficiency advantages: the incremental pressure per impeller stage reduces overall energy consumption, while the head can be flexibly adjusted by adding or removing impellers. Constructed from corrosion-resistant materials like stainless steel and cast iron, they are compatible with clean water, high-temperature water (e.g105°C boiler water), and corrosive media.
Application purpose
This equipment is widely applied in high-pressure scenarios: 1.Construction: Water supply and firefighting systems in high-rise buildings (e.g., multistage fire pumps can stably deliver high-pressure water to skyscrapers)； 2.Industrial: Corrosive fluid transfer in chemical production, boiler feedwater and cooling circulation in power plants, oil well fluid extraction and pipeline transportation in the petroleum industry; 3.Public Infrastructure: Municipal pipe network pressurization, mine drainage, and wastewater treatment; 4.Agriculture: High-head irrigation and water lifting in mountainous areas. Compared to single-stage pumps, their advantages include strong operational stability (self-balancing design reduces bearing wear), adaptability to complex working conditions (high-temperature/corrosion resistance), and extended service life (premium materials and advanced sealing technologies).
PUMP SPECS
| TYPE | STAGE | FLOW(m3/h) | SPEED(rpm) | HEAD(m) | POWER（kw） |
| D6 | 2~12 | 6 | 2950 | 50~600 | 3~55 |
| D12 | 2~12 | 12 | 2950 | 50~600 | 5.5~75 |
| D25 | 2~12 | 25 | 2950 | 60~600 | 11~110 |
| D45 | 3~12 | 45 | 2950 | 60~600 | 15~160 |
| D85 | 2~9 | 85 | 2950 | 90~1000 | 37~450 |
| D120 | 2~9 | 120 | 2950 | 100~450 | 55~220 |
| D150 | 2~10 | D150 | 1480~2950 | 60~600 | 45~450 |
| D280 | 2~10 | 280 | 1480 | 86~650 | 110~900 |
| D360 | 2~10 | 360 | 1480 | 80~400 | 132~630 |
| D500 | 2~10 | 500 | 1480 | 114~570 | 250~1250 |