Safety heat exchangers

When safety is your number one priority

The range of safety shell-and-tube heat exchangers is based on the ‘three chamber devices’ principle, which was developed
and patented by the company’s founder Karl-Heinz Funke.

Operating principle of a safety heat exchanger

Here with double tubes, double sheets and leak sealing liquid

Operating principle of a safety heat exchanger with double tubes, double sheets and leak sealing liquid

V = volume expansion tank, P = pressure control device, yellow area = safety space

Design Features

Media separated by double tube bundles, media cannot mix
Special sealing liquid for immediate leak indication
Leakage system works independently of the installation position
Leakage detection is possible through process control
Suitable for a wide range of liquid media

Application

Safety heat exchangers are used wherever the highest requirements for product purity in process engineering (e.g., food/pharmaceutical industry) are required, where there is an environmental risk of contaminating cooling or process water, or because mixing of the media can damage the machine or system.

FUNKE offers three versions for different requirements:

SWF/P, SSWF/P (customised)

Design features

Tube bundle fixed (F) or removable (P versions)
Tube side 1-, 2- or 4-pass
Horizontal or upright version

Note

Based on the customised range
(see „Customised“ section)

Different construction regulations, customer specifications and country-specific approvals, as well as materials, can also be taken into account.

Furthermore, larger building sizes (diameter and overall length) are possible compared to the standard model series.

SWF-HE, SSWF-HE

Design features

Tube bundle fixed
Tube side 1-, 2- or 4-pass
Horizontal or upright version

Note

Based on the customised range
(siehe „Customised“ section)

Different construction regulations, customer specifications and country-specific approvals, as well as materials, can also be taken into account.

Furthermore, larger building sizes (diameter and overall length) are possible compared to the standard model series.

Special features

In this version, a double wall tube (made of stainless steel or carbon steel) with an increased contact area between the inner and outer tube is produced via hydraulic expansion technology. This results in a connection with approx. 80% tube-to-tube contact, far more than in comparable systems (significantly increased efficiency and compactness).

Due to the construction-related design, crevice corrosion is not possible.

Compared to the safety heat exchanger versions 1 and 2, no sealing medium is required for this system since the space in between is monitored by means of a vacuum. This heat exchanger can also be used for products that are not allowed to come into contact with liquids.

SWF/P, SSWF/P (Series)

Design features

Tube bundle fixed (F) or removable (P versions)
Material variants

Brass (types SWF/SWP)
Stainless steel (types SSWF/SSWP)

Internal tube measurement (brass):
exterior inner tube 9.5 x 0.8 mm, interior inner tube 7.7 x 0.8 mm
Internal tube measurement (stainless steel):
exterior inner tube 9.5 x 0.8 mm, interior inner tube 7.7 x 0.7 mm
Variable baffle spacing
Tube side 1-, 2- or 4-pass
• Horizontal or upright version with
angle or clamped feet or stand