Environmental Product Declaration
Environmental Product Declaration
Brazed plate heat exchanger
Flow principle of a brazed plate heat exchanger
Alfa Laval endeavours to perform its own operations as
cleanly and efficiently as possible, and to take environmental
aspects into consideration when developing, designing,
manufacturing, servicing and marketing its products. It does
this by identifying the significant environmental impacts of its
products and operations and taking appropriate measures
to reduce them. This work is supported by implementing
environmental management systems (normally certified to
ISO 14001) in all its manufacturing operations.
This Environmental Product Declaration is made in accordance
with ISO 14021. For more information, Life Cycle Assessment
and Sustainability Reports are available on request.
The product
A brazed plate heat exchanger consists of a pack of thin
corrugated metal plates. A thin copper foil is placed between
each plate. The assembly is placed in a high temperature fur-
nace in which the copper foil melts and brazes two adjacent
plates together. The melted foil also seals the channel formed
between two plates. In order to retain high internal pressure,
two thicker front and end plates are normally brazed to both
sides of the plate pack. Connections for media are either
brazed or welded to the front plate.
The size of the unit and the number of plates are determined
by the requirements of the particular application and duty.
Each individual brazed plate heat exchanger is optimised for
its duty and as a result, the usage of materials is kept to a
minimum.
Construction materials
Plates and connections
Both the corrugated plates and the thicker front and end plates
are made of stainless steel type 304 or type 316. The degree
of recycled material in stainless steel 316 is typically between
60-90%. Connections are normally made of stainless steel
type 304 or 316, but may also be made of carbon steel.
Packing
Packing material consists of wood, plastics, cardboard boxes
and, in some cases, metal straps. Alfa Laval enforces strict
environmental demands on suppliers for all types of packing
material.
Brazing material
The brazing material is copper with 99.9% purity. For a complete
brazed heat exchanger, the copper constitutes around 10% of
the total weight.