BWT Bewamat

Size: Bewamat 75A | 11325
Sale price€2.044,43


Intelligent quantity-dependent regeneration

The simplex water softeners Bewamat 75A / 25A are equipped with a device that disinfects the ion exchange resin during the regeneration. Spring-loaded non-return valves protect all water connections on the inlet side of the unit.

The systems comply with all relevant national and international standards.

Technical Specifications

 Bewamat Type 25 A 75 A
Product no. 11324 11325
Nominal connection width DN 32 (G 1 1/4“ AG) 32 (G 1 1/4“ AG)
Nominal pressure (PN) bar 10 10
Operating pressure bar 2.5-8.0 2.5-8.0
Nominal flow according to EN 14743 m3/h 1.4 1.8
Pressure loss at nominal flow rate bar 1.0
Max. flowrate m3/h 1.4 2.5
Nominal capacity according to EN 14743 m3 x °d (mol) 25 (4,5) 75 (13,4)
Regenerative consumption per regeneration, ca. kg 1.2 3.5
Regenerative water requirement, ca. Liter 55 128
Quantity of resin Liter 8 21
Quantity of regenerative, max kg 15 50
Power supply V/Hz 230/50 230/50
Power in watts Watt 20 20
Unit voltage V/AC 18 ~ 18 ~
Permissible voltage peaks, max. KV 1 1
Protection class IP53 IP53
Water/ambient temperature °C 5 - 30 / 5 - 40 5 - 30 / 5 - 40
Humidity non condensating non condensating
Height H x Width W, ca. mm 640 x 390 1090 x 390
Depth D1 / D2, ca. mm 460 / 560 460 / 560
Connection height mm 500 960
Height of overflow mm 280 650
Connection width mm 60 60
Min. sewage system connection DN 50 50
Approx. operating weight kg 40 100

Scope of Delivery

Bewamat A water-softening unit, with:

  • Manifold control valve with microprocessor controller
  • Brine valve
  • Softening column with ion exchanger
  • Cover
  • Storage area for regenerative
  • Brine cavity
  • Softened water output
  • Hard water inlet
  • Flushing water connection
  • Overflow
  • Power supply unit with cable and mains plug
  • 2 m flushing water hose
  • 2 m overflow hose 18 x 24
  • Fixing material


Intended Use

Bewamat A is suitable for partial softening of drinking and service water, to protect the water pipes and the connected fittings, appliances, boilers etc. from malfunctions and damage caused by lime incrustation.

The product size must correspond to the expected conditions of use. Information on this can be found in DIN 1988-200 and in the technical data in Chapter 12 of these Installation and Operating Instructions.

If the product is intended for commercial use, it must be checked / approved by a BWT consultant.

Operation of the product with regular functional checks as well as the execution of the necessary maintenance measures for the safe operating condition in compliance with the operating conditions on which the planning and installation are based.


The unit operates according to the principle of intelligent regeneration.

Intelligent quantity-dependent regeneration: When the unit is started, the available supply of softened water is programmed (depending on the hardness of the drinking water).

At a user-defined time (e.g. at night), the unit checks whether the remaining supply of softened water is sufficient for the following day.

If not, the softening column is regenerated in order to refill the supply of softened water up to 100%.

In the event of a power failure, the data and the time are kept (about 1 year).

The unit is equipped with a device that disinfects the ion exchange resin during the regeneration. Spring-loaded non-return valves protect all water connections on the inlet side of the unit.

Automatic activation of regeneration: If the capacity is not used up within four days, the electronic system triggers a regeneration.

The system complies with all relevant national and international standards.

Bewamat 75 A only: Two capacity levels can be set on the controller, making the unit suitable for larger applications.

The unit is preset. In case less performance is necessary, this can be set by after-sales service.

Feed water

The hard water to be fed into the unit must always meet the specifications of the Trinkwasserverordnung (German drinking water ordinance) or EU Directive 98/83/EC. The total dissolved iron and manganese may not exceed 0.1 mg/l.

The hard water to be fed into the unit must always be free of air bubbles. Install a bleed device if necessary.

If the treated water is intended for human consumption as defined in the Trinkwasser-verordnung (German drinking water ordinance), the ambient temperature must not exceed 25 °C. If the treated water is intended for industrial purposes only, the ambient temperature must not exceed 40 °C.

The unit’s maximum operating pressure must never be exceeded (see technical specifications). If the network pressure is higher, a pressure reducer must be installed upstream of the unit.

The unit requires a minimum operating pressure to function (see chapter 12, Technical specifications).

During pressure fluctuations and surges, the sum of the pressure surge and the standing pressure must not exceed the nominal pressure. The positive pressure surge must not exceed 2 bar and the negative pressure surge must not be less than 50 % of the self-adjusting flow pressure (see DIN 1988- 200/3.4.3).

Continuous operation of the water softener with water containing chlorine or chlorine dioxide is possible if the concentration of free chlorine/chlorine dioxide does not exceed 0.5 mg/l.

Continuous operation with water containing chlorine/chlorine dioxide will cause premature ageing of the ion exchange material. A water softener reduces the concentration of free chlorine and chlorine dioxide. In other words, the concentration in the outflow of a water softener is generally considerably lower than in the inflow.


BWT Bewamat Installation and Operating Instructions 

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