QSZ submersible drainage pump

High-efficiency submersible axial / mixed-flow pumping unit designed for irrigation, drainage and emergency flood-control in plain areas. The pump combines a dry-type, fully enclosed three-phase asynchronous motor with a vertical, top-drive pump assembly so the motor and impeller are integrated and installed submerged.

Key features

• Integrated submersible design: pump and motor assembled as a single submerged unit for compact installation and minimal civil works.
• Remote or automatic control: supports remote operation and automatic control systems — no dedicated pump room required.
• Simple installation and maintenance: vertical or inclined installation; straightforward access and servicing.
• Reliable, safe operation: fully enclosed motor protects against ingress and reduces downtime.
• Cost-saving: eliminates need for above-ground pump station building and related construction costs.

Typical applications

• Small and medium-sized electromechanical irrigation stations
• Agricultural and municipal drainage systems
• Emergency flood-control and temporary drainage projects

Performance and operating conditions

• Power supply: 50 Hz, 380 V, three-phase
• Water temperature: up to 40 °C
• Liquid pH range: 5.5 – 8.5
• Minimum submerged depth: 0.8 m
• Flow range: 450 – 3,000 m3/h
• Head range: 3 – 10 m
• Installation: can be installed vertically or at an incline

Model coding example

• 300QSZ-5.4-18.5 — where “300” = outlet diameter (300 mm), “QSZ” = submersible axial-flow pump (QSH denotes submersible mixed-flow), “5.4” = design lift (m), and “18.5” = motor power (kW).

Ordering notes

• Specify whether axial (QSZ) or mixed-flow (QSH) impeller is required, required outlet size, design head and duty point to match motor power and impeller selection.
• Provide control and protection preferences (starter, soft-start, level controls, automation interface) so the unit can be supplied ready for site commissioning.