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Dr. Hartmann GmbH & Co. KG

Water treatment system for compounding and extrusion plants

For sale is a complete industrial water treatment system for supplying a compounding or extrusion plant with softened and fully demineralized process water. The system consists of pre-filtration, a dual softening unit, a reverse osmosis unit, a 3,000-liter permeate tank, and a frequency-controlled dual booster pump unit.

The system is particularly suitable for closed-loop cooling water circuits and for applications where a consistently high water quality and a reliable supply to the production plant are required.

System configuration

Pre-filtration and protection

Backwash filter for mechanical impurities
Flow rate: 7.5 m³/h at a pressure drop of 0.5 bar
Automatic, time-controlled backwash
System separator with a KVS value of 12 m³/h
Connection size: R 1"
Pressure regulator with a DIN flow rate of 5.3 m³/h
Safety module
Connection block with integrated bypass and sampling valve
Flexible pressure hoses, length 1,000 mm, Rp 1", up to 10 bar

Dual softening unit

Dual softening unit for continuous operation
Nominal flow rate: 2.9 m³/h
Capacity: 200 m³ × °dH each
Resin disinfection system
Salt deficiency switch with potential-free alarm or low-level signal
Sampling group with pressure gauge and sampling valve
Hardness control unit for wall mounting
Installation fitting for 1" pipe

Due to the dual design, one softening column can be regenerated while the second column continues to supply softened water.

Reverse osmosis unit

Reverse osmosis unit with vertically arranged high-performance modules, permeate recirculation, and automatic concentrate flushing.

Technical data:

Permeate flow rate at 15 °C: approx. 450 l/h
Recovery rate: approx. 75 %
Salt rejection rate: approx. 98.5 %
Required inlet pressure: 2–6 bar
Feed water connection: DN 25
Permeate connection: DN 20
Concentrate connection: DN 15
Supply voltage: 3 × 400 V / 50 Hz
Dimensions: approx. 1,800 × 610 × 810 mm (H × W × D)
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Permeate tank

Black PE storage tank
Capacity: 3,000 liters
With level control and various connections
Dimensions: approx. 1,750 × 995 × 2,450 mm (H × W × D)

Dual booster pump unit

Pre-assembled and electrically wired booster pump unit on a stainless steel frame, ready for connection. Equipped with two pumps and integrated frequency converters for constant and demand-based pressure supply.

Technical data:

Nominal flow rate per pump: 2.0 m³/h
Nominal head: 43.6 m
Flow rate with one pump: approx. 0.6–3.0 m³/h
Flow rate with two pumps: approx. 1.2–6.0 m³/h
Delivery pressure at maximum flow rate: approx. 2.5 bar
Zero flow head: approx. 6.7 bar
Factory-set constant pressure: 4.0 bar
Pre-pressure of the diaphragm expansion tank: 3.5 bar
Measuring range of the pressure sensors: 0–10 bar
Diaphragm expansion tank: 8 liters
Permissible water temperature: 1–30 °C
Permissible ambient temperature: 1–40 °C
Suction connection: DN 65 / PN 10, loose flange
Pressure connection: 50-mm socket
Supply voltage: 3 × 380–500 V
Motor power: 2 × 1.1 kW
Nominal current per pump: 2.2–1.9 A
Dimensions: approx. 950 × 700 × 858 mm
Dry weight: approx. 55 kg

Technical specifications based on available documentation. Subject to prior sale and errors. An inspection of the system is possible by prior arrangement.

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