Introduction Of The 4Hs Submersible Pumps Range - Nastec 4HS Installation And Operating Manual

1. Introduction of the 4HS submersible pumps range

4HS is a 4" high speed centrifugal submersible pump for clean water composed by:

high speed three phase asynchronous motor with wet rotor and canned type resin filled stator.

Built-in inverter on board driven by a dedicated control module (CM) positioned outside the well.

High speed multi stage pump entirely made of AISI 304 stainless steel.
Pump driving made by inverter allows:

Modify the pump speed to grant constant the desired pressure regardless water request. In this way the
pump is operated only and when needed thus avoiding unnecessary waste of energy and granting longer
system life.

implement the soft start and the soft stop to increase the system life and reducing the current peaks.

protect the motor from overloading and dry running , overvoltage, undervoltage and possible abnormal
conditions
4HS is used on residential and industrial sectors for water pressurized systems, granting:

Energy saving

Simplified and quick installation

Long life reliability
4HS: submersible pump
CM: control module
3