4HS
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4” variable speed submersible pumps E HIG AV

4HS is a range of 4” electric submersible pumps for well applications, featuring: ■ Three-phase, water-filled, permanent magnet synchronous motor with encapsulated resin stator, fully constructed of AISI 304 stainless steel. ■ Built-in integrated inverter controlled by CM control module. ■ Multistage pump made of AISI 304 stainless steel. An inverter allows 4HS to: ■ Change pump speed to maintain set-pressure regardless of water demand. Consequently the pump is operated only when and as needed without wasting energy, thereby extending pump life. ■ Starts and stops pump gently, thus reducing...

4HS pumps are made entirely of AISI 304 stainless steel to ensure the long life of their components Pump, motor and hydraulic components are easily disassembled for simple maintenance and replacement operations. Centrifugal pump Impellers and diffusers in stainless steel. Built-in no-return valve. Motor Permanent magnet motor. Resined and incapsulated stator made of AISI 304 stainless steel. Water-cooled rotor. Kingsbury thrust bearing. Built-in inverter module (MINT) Completely resin-filled. Removable power cable.

CM control module, mounted above-ground, manages the pump operation by changing pump speed to maintain the desired pressure in the system regardless of water demand. Simply connect the pressure transducer, supplied as standard, and perform a quick setup of the sensor to configure the pressure range for the system. During operation, the CM control unit continuously monitors the electrical, hydraulic and thermal parameters providing complete protection against surges, undervoltage, overload and dry running. The waterproof junction between the pump lead and drop cables is made using a kit...

To set up the system in a constant pressure application simply install the 4HS pump, connect the CM control module and wire the pressure sensor A small pressure tank is normally used to compensate for water loss while the pump is not running. The control module receives the pressure signal from the pressure transducers and varies pump speed to maintain a constant set pressure regardless of water demand. In addition to the constant pressure control, CM can also manage the following control modes: ■ fixed frequency ■ constant flow ■ constant temperature 1 4HS pump 2 Control Module 3 No return...

Pump selection Variable speed allows 4HS to cover a wide range of water flow and heads with just a few models; selecting the proper pump model for an application will help maximise performance and overall efficiency. Use the diagram below to select the most suitable 4HS pump model for your application. Energy saving If the water demand decreses, 4HS will reduce the speed (proportional to the frequency) to maintain constant pressure. As you can see from the chart, a speed reduction corresponds a significant decrease of the power consumption. For example, maintaining constant the 6 bar (197...

Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover

Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover

Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover Technical specifications Rated input voltage 1 x 190 - 265 VAC * Max external diameter including cable and cable cover

4HS pump can be installed both vertically and horizontally, as long as the outlet is never lower than the horizontal axis. To ensure proper cooling if 4HS is not installed in a 4” well, it is necessary to use a cooling sleeve.

Nastec srl Via della Tecnica 8 36048 Barbarano Mossano Vicenza - Italy tel +39 0444 886289 fax+39 0444 776099 info@nastec.eu GR000860_rev2 01.2019 Nastec reserves the right to modify the technical features contained in this document without notice.