Masdaf - Circulation pumps (GenIO INM)
GenIO INM — a single-stage linear centrifugal pump with a dry rotor and a frequency converter mounted directly on the motor. Flow rate from 2 to 520 m³/h, head from 2 to 105 m, suction and discharge flanges DN 40–DN 200 of the same diameter, speed range 1,000–3,600 rpm. The pump complies with DIN 24255 within the rated flow range.
How does the GenIO INM differ from a wet-rotor pump?
The difference lies in the position of the motor’s rotor. In wet-rotor pumps, as ModulA RED, the rotor rotates in the fluid being pumped, which simultaneously lubricates the bearings and cools the motor. In the GenIO INM, the rotor is dry and separated from the fluid by a mechanical face seal.
The difference lies in the range. A wet-rotor pump has a head of up to 18 metres and a flow rate of several tens of cubic metres per hour. The GenIO INM operates over a wider range: a head of up to 105 metres and a flow rate of up to 520 m³/h.
Selection rule: for a head of up to 18 m and a moderate flow rate, a wet rotor is sufficient; it is quieter and does not have a seal as a wearing part. Above this range, a dry rotor is required.
What are the benefits of a frequency converter on a motor?
The converter is mounted directly onto the motor, so there is no need for a separate drive cabinet, and the length of the power cable between the drive and the motor is kept to a minimum.
When operated at variable speed, the pump runs more efficiently than at a constant speed. This is because, rather than throttling off excess head using a valve, the pump reduces its speed and generates no excess head at all.
A single drive can control two pumps. Provision is made for connecting sensors for automatic control and monitoring, as well as protection against dry running.
GenIO INM Technical Specifications
| Parameter | Value |
|---|---|
| Type | linear centrifugal, single-stage, dry rotor |
| Regulation | frequency converter on the motor |
| Capacity | 2–520 m³/h |
| Pressure | 2–105 m |
| Revolutions | 1,000–3,600 rpm |
| Suction flange | DN 40–DN 200 |
| Discharge flange | DN 40–DN 200 |
| Medium temperature | −25…+120 °C |
| Pressure at the discharge flange | not exceeding 16 bar |
| Compliance | DIN 24255 |
| Minimum Efficiency Index | MVE ≥ 0.4 |
For applications with pressures exceeding 16 bar, a special version is required on the discharge flange.
What does MVE ≥ 0.4 mean?
MVE, or MEI — the minimum efficiency index — was introduced by the Ecodesign Directive 2009/125/EC through Regulation 547/2012. It applies to pumps with a maximum shaft power of 150 kW or less at the largest impeller diameter.
For the INM series, the index is at least 0.4. The MVE value is stated on the pump’s nameplate and is indicated on the performance curves.
MVE applies to centrifugal water pumps, whilst EEI applies to wet-rotor circulation pumps. These are different indicators from different regulations, and they cannot be compared with one another.
Where is GenIO INM used?
The series is designed for water supply networks and pressure-boosting systems, irrigation, sprinkler systems and drainage, filling and emptying of reservoirs and tanks, circulation of hot or cold water in heating and cooling systems, condensate pumping, water circulation in swimming pools, sanitary and hygiene facilities, industrial and public facilities, as well as the transfer of fresh and seawater on vessels.
The three areas in which this series is most commonly used are: water supply and pressure boosting, automatic water control and distribution systems, and installations where there is a requirement to reduce electricity consumption.
What are the requirements for the fluid being pumped?
The pump is designed for clean or slightly contaminated water — liquid, non-abrasive, free from large solid particles and fibrous inclusions.
The characteristic curves have been plotted for water with a density of 1 kg/dm³ and a kinematic viscosity of 1 sSt. For liquids with different densities or viscosities, the characteristics will differ, and the selection must be agreed separately. For media with different chemical or physical properties, separate approval is required.
Selection and service from Steiner Ukraine
A built-in inverter only delivers energy savings if the pump is selected to match the actual characteristics of the mains supply. A pump chosen with a margin operates continuously at a reduced frequency and falls outside the range of highest efficiency.
We determine the design flow rate and head at the operating point, the system resistance characteristics, the medium temperature, the available inlet head, discharge pressure and the control scheme — single pump, two pumps driven by a single drive, or operation based on a pressure or differential pressure sensor. Based on this, we determine the model size, flange diameter and drive configuration. Next come supply, service and spare parts. Steiner Ukraine has been operating in the industrial equipment market since 2006.
The following helps to identify where energy is being lost in the existing system Energy audit of pumping stations. Other items — in the section Masdaf pumps and in the catalogue industrial pumps and hydraulic systems.
