Softening unit on-site

Softening units for removal of hardness

The softening units are used for reduction of calcium and magnesium in the water using a cation exchanger. Calcium and magnesium are exchanged for sodium through ion exchange.

Softened water is used for steam boiler plants, district heating plants, laundries, cooling towers, rinse processes, washing, dishwashing etc.

Why water softening?

Softening prevents calcium deposits in e.g. piping, steam boilers, district heating installations, hot water units, heat exchangers, and cooling towers. Traditional use of chemicals for calcium binding can be avoided. In other words, softening can optimize energy use in boilers and hot-water units, minimize chemical usage and prolong the life of installations and plants. 

Application of softening units

Designed for maximum reliability

The softening plant type SMP is specifically designed for applications which demand high reliability of operation. The construction of the plant and the pipe system result in a low pressure loss and consequently less energy consumption. 

The SMP is available in Simplex, Duplex and Triplex versions. The plants are equipped with automatic, pneumatically actuated ball valves – if supply of electricity and air is not available, the valves are closed.

Download leaflet to read more about the features of the softening plant SMP. 

Download leaflet 

Softening unit SMP for high reliability

Anti-corrosion tanks

The filter tanks are of steel and therefore less susceptible to changes in pressure. The tanks are coated with polyethylene. Thus, the filter tanks combine the strength of steel with the strong anticorrosion property of synthetic material. 

Fail-safe valve

Our patented five-cycle valve is made of high-quality synthetic material and has few movable parts. Taken together, this endows the valve with reliable operation, long life and minimum maintenance. 

Pipe system

As standard, the pipe system is supplied as PVC or PP with the quality of being corrosion-proof and resistant to chemicals. The pipe system can also be customized in several other plastic types or stainless steel. Steel is a robust material that endures very high temperatures. 

Standard control

Each softening plant comes with a standard PLC control. Our controls are purpose-made and individually programmed by our own engineers. The simple user interface facilitates check of configuration parameters and control of operation and regeneration.   

Product overview

Our product range comprises a wide number of standard plants, all engineered and manufactured in-house. The starting point is our modular-built standard system ensuring high flexibility, high reliability in operation, and short delivery time. Each solution can be customized and built according to the specific application by adapting the choice of material, instrumentation, and control system - based on our combined know-how. 

Plant design
Standard plants are available as one-tank or two-tank units for continuous water production. Each tank has individual valves to ensure reliable operation. All plant types come with a brine tank. 

Several of the plant types are available for treatment of both cold (max. 35 oC) and hot water (max. 85 oC). The plants for hot-water softening is especially suited for sanitary installations.


Contact your local sales and service office for more information, data sheets or instructions. 

Contact us

Softening unit SM SG

Flow up to 3.6 m3/h

Product type:SM / SG
Temperature:Cold or hot
Pipe system:PVC or 
galvanized steel
Softening unit SF SFG

Flow up to 9 m3/h

Product type:SF / SFG
Temperature:Cold or hot
Pipe system:PVC or 
galvanized steel
Softening unit SMH SMP

Flow up to 30 m3/h

Product type:SMH / SMP
Pipe system:PVC or PP
Softening unit SFH SFHG

Flow up to 32 m3/h

Product type:SFH / SFHG
Temperature:Cold or hot
Pipe system:PVC or 
galvanized steel

Softening unit STFA for high flow rate

Flow up to 150 m3/h

Type: STFA
Temperature: Cold
Pipe system: PVC or PP

As standard design, STFA softening plants are supplied with a nozzle plate. It ensures optimum utilization of salt and an even distribution of water both during operation and backwash. All STFA plants are also supplied with a brine maker for automatic production of brine. 

See how the nozzle plate operates

Options - for a reliable production

Brine maker

A brine maker is an automatic system for production of large quantities of brine. Typically, fewer salt fillings are needed. At the same time, an inexpensive salt type can be used. It is possible to choose a brine maker for several of the plant series. 

Brine maker

Automatic quality test

The quality of the softened water can be monitored by a Online Hardness Control analyzing the residual hardness in the water. The Online Hardness Control is set to an actual hardness limit. Exceeding this limit will release an alarm and start a regeneration.

Testomat for automatic quality test

Manual test kit

Monitoring of softened water can also be done manually with our Durognost test kit. An easy and quick solution for testing the residual hardness after softening. 

Manual test kit for water softening

Salt tablets for water softening

The quality of the salt used for regeneration can influence the performance of your softening unit. EUROWATER salt tablets are produced under controlled production conditions and are tested in our own plants. Our product is approved for food processing applications and contains typically 99.8% of sodium chloride (min. 99%).

For more information download our leaflet about high-quality salt from EUROWATER.

Download leaflet

10 kg

Plactic bag with handle


Salt tablets for water softening in 10 kg. bag

25 kg

Plastic bag

Salt tablets for water softening in 25 kg. bag

1000 kg

A pallet with 40 bags


Pallet of salt tablets for water softening


Water saving

Certain softening plants are supplied with conductivity meters that continuously measure the actual conductivity in the rinse water. When the ion exchanger is clean, the regeneration stops, thereby minimizing rinse water consumption.

Odense Universitetshospital is one of the largest hospitals in Denmark. The hospital chose a softening unit with conductivity meter to minimize operational cost and water consumption.  

Read more

Softening unit at hospital

Get the optimum softening solution 

Read more about softening and our softening units in this leaflet, where we have collected all about reliable softeners.

Download leaflet

Leaflet on water softening and softening units

Get the optimum solution

Selection of unit depends on application, water quality, and water consumption. We are at your service to ensure the optimum solution based on our combined know-how. Fill in the form and let us get back to you.

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