Three-phase drainage pumps, designed to pump large volumes of water. The spiral shape of the pump casing, an air & water channel around the motor & the air-release valve, all combine to provide smooth, anti-clog pumping.
| Discharge bore mm | 250 (mm) |
| Motor output kW | 75,0 |
| Head max. m | 52,0 |
| Capacity max. l/min | 12500 |
| Max. solid handling ø mm | 25 |
| Discharge bore mm | 250 (mm) |
| Motor output kW | 75,0 |
| Head max. m | 38,0 |
| Capacity max. l/min | 17500 |
| Max. solid handling ø mm | 25 |
| ø Discharge bore mm | 250 |
| Discharge Connection | JIS 10K Flange |
| Impeller | Closed type impeller |
| Shaft Seal | Double mechanical seal |
| Bearings | Shielded ball bearings |
| Impeller | Stainless steel casting DIN X5CrNi18-10, Chromium iron casting |
| Casing | Grey iron casting EN-GJL-200 |
| Shaft Seal | Silicon carbide in oil bath |
| Type of Fluid | Spring water, Rain water, Ground water, Sand carrying water |
| Temperature | 0-40°C |
| Type, Poles | Induction motor, 4 poles, IP68 |
| Insulation | Insulation class E |
| Phase / Voltage | 3-phase / 400V / 50Hz / s.d. |
| Motor Protector (built-in) | Miniature protector |
| Lubrication | Turbine oil (ISO VG32) |
| Casing | Grey iron casting EN-GJL-200 |
| Shaft | Stainless steel EN-X30Cr13 |
| Cable | Rubber, NSSHÖU |
| Model | A | A1 | B1 | D | H | W1 | d |
|---|---|---|---|---|---|---|---|
| GSZ2-75-4 | 1050 | 850 | 655 | 708 | 1733 | 510 | 250 |
| GSZ2-75-4L | 1050 | 850 | 700 | 739 | 1778 | 730 | 250 |
The GSZ-series is a submersible three-phase cast iron high head and high volume heavy-duty drainage pump driven by a 4-pole motor. The side discharge, spiral design allows smoother passage of the sucked solid matters. The motor is cooled by a water jacket that assures efficient motor cooling even when it operates with its motor exposed to air. The pump incorporates seal pressure relief ports that prevent the pumping pressure from applying to the shaft seal.
A large open pit coal mine used to install dewatering pumps from European manufacturers and had issues with pumping water during heavy rain events and snow season when the water became mudy and loaded with solids. When the water became loaded with abrasive material a lot of problems started.
