CSN® flow heater type 97/AS

Our CSN® instantaneous water heater 97/AS is a modular heater, ideal for low volume flows and temperatures up to 100°C.


The CSN® flow heater 97/AS is specially designed to efficiently heat single or multi-pass liquids and gases. Its design, consisting of an aluminium flow tube with individually replaceable screw-in heating elements, offers flexibility and enables easy maintenance. Thanks to a carefully customised configuration, we guarantee not only a long service life but also a high level of efficiency.

Product advantages

  • Also suitable for low volume flows
  • Compact screwed aluminium design
  • Modular design
  • In accordance with Pressure Equipment Directive 2014/68/EU
  • Highly compressed U-shaped bent CSN® tubular heating elements

Technical data


Liquid and gaseous media up to max. 100°C


0.5 to 100 kW


110 to 690 V

Ambient temperature range

Standard +5 to +35°C

Process data

Medium, pressure and temperature according to specification

Process connection

Internal thread DIN ISO 228

3/4" to 1 1/2"

Flanges DN32 to DN65

Heating elements

Tubular heating elements

Materials Heating elements

1.4404 (AISI 316L); 1.4541 (AISI 321); 1.4571 (AISI 316 Ti);

1.4876 (Incoloy 800); 2.4858 (Incoloy 825)

Installation length screw-in heater

300 to 3500 mm

Flow tube

Single or multi-tiered in U-shape

Flow tube materials


Temperature monitoring

Temperature controller,

temperature limiter,

Safety temperature limiter,

PT100 or thermocouples

Operating pressure

0 to 10 bar

Protection class

IP00 to IP65

Customised versions on request

The following certifications are available on request:

Your contact persons

Your request

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