Centrifugal Pumps
Single-stage volute casing centrifugal pumps in back pull-out design. Ratings and main dimensions comply with EN 733. A closed radial impeller, replaceable casing wear rings and a mechanical seal to EN 12756 ensure long-term reliable operation.
Thanks to their wide flow and pressure range, they are used in many applications — from water supply systems to heating, cooling and air-conditioning circuits, fire-fighting, irrigation and swimming pools. Cast iron, ductile iron and cast bronze casing options adapt them to a variety of needs, from clean water to seawater.
Main Applications
- Clean fluids and fluids that are not chemically or mechanically aggressive to the pump materials
- Water supply systems
- Cooling circuits
- Heating systems
- Air-conditioning systems
- Swimming pools
- Fire-fighting systems
- General and sprinkler irrigation systems
- Drainage systems
Technical Data
| Max. flow rate | 2321 m³/h |
|---|---|
| Min. flow rate | 1.5 m³/h |
| Max. head | 160 m |
| Min. head | 2 m |
| Max. operating pressure | 16 bar |
| Discharge nominal pressure | PN 10 / PN 16 (ASME CL 125 / CL 150) |
| Fluid temperature | -30 °C … +140 °C |
| Mains frequency | 50 Hz / 60 Hz |
| Mains voltage | 220 V … 690 V |
| Connection | Flanged (EN 1092, ASME optional) |
| Drive | Electric motor or combustion engine |
| Suction type | Normal suction |
| Standard | EN 733 |
Material Options
| Component | Material options |
|---|---|
| Casing – cast iron | EN-GJL-250 (ASTM A48 CL 35B) |
| Casing – ductile iron | EN-GJS-400-15 (ASTM A536 GR 60-40-18) |
| Casing – bronze | CC480K (ASTM B30 C90700) |
| Impeller | Grey cast iron EN-GJL-250 (JL1040) |
| Shaft | Steel E335 or heat-treated steel C45 |
| Casing wear rings | Grey cast iron or asbestos-free material |
| Shaft seal | Standard: single mechanical seal (EN 12756); optional: double mechanical seal or gland packing |
Which material? Cast iron is recommended for clean water, heating and cooling circuits; ductile iron for lines requiring higher mechanical strength; bronze casing for seawater and brackish water.
Advantages
Energy Efficiency
- High-efficiency hydraulic design; the impeller diameter is trimmed to the duty point as standard.
- Energy savings of up to 60% with variable speed control.
- The efficiency requirements of the ErP Directive (MEI ≥ 0.4) are significantly exceeded.
Operating Reliability
- Low NPSH values and optimum suction characteristics.
- Confined casing gasket for increased tightness.
- Large stud diameters (M12/M16) ensure secure connections.
- The shaft protecting sleeve protects the pump shaft from wear.
Wide Range of Options
- Single and double mechanical seal and gland packing options.
- A large variety of materials to suit different fluids.
- EN 1092 flanges, ASME bolt hole pattern optional.
Ease of Service
- Back pull-out design: coupling, bearing bracket and impeller can be removed without disconnecting the pump casing from the piping.
- Easily replaceable wear rings reduce wear at the impeller and casing cover.
- Forcing screws on the casing cover make dismantling easier.
Smart Monitoring
- Optional temperature and vibration monitoring system.
- Optional pump performance monitoring.
High-Efficiency Motor
- IE4/IE5 efficiency class motor option with frequency inverter.*
* The IE5 efficiency class (IEC/TS 60034-30-2) motor option is available up to 15/18.5 kW. Please contact our sales team to check suitability.
Design and Construction Features
- Single-stage, volute casing, back pull-out design
- Ratings and main dimensions to EN 733
- Closed radial impeller with multiply curved vanes
- Replaceable casing wear rings
- Single or double mechanical seal to EN 12756; replaceable shaft protecting sleeve in the shaft seal area
- Conical seal chamber prevents internal circulation and improves venting and flushing
- Motor mounting dimensions to IEC 60072, envelope dimensions to DIN V 42673
- ATEX-compliant version available for explosive atmospheres
To choose the right model, send us your required flow rate, head, fluid type and temperature via the Request a Quote form; our technical team will specify the most suitable pump.
How to Choose
- Determine the flow rateThe total fluid demand of the system (m³/h) determines the pump size and impeller diameter.
- Calculate the headAdd static height, pipe and fitting losses and the required outlet pressure; the duty point should lie in the efficient range of the pump curve.
- Define the fluid and temperatureClean water, hot water or seawater; the operating temperature between -30 °C and +140 °C affects casing material and seal selection.
- Select material and driveCast iron, ductile iron or bronze casing depending on the fluid; a speed-controlled high-efficiency motor for energy savings.
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