13
ITEM
A-03-343
DATED
NOVEMBER 2012
SUPERCEDES
MARCH 2011
Term
Explanation
BY frame.
An especially stable frame design, which also allows a high number of heat exchanger plates.
Backflushing.
A cleaning process in which the direction of flow is reversed. Reversing the direction of flow
flushes the particles of contamination from the heat exchanger.
Carrying beam
(aka the upper beam).
The top component placed between the fixed plate and support leg, which guides or supports the
upper edge of the heat exchanger plates. In CY frames the carrying beam guides the heat exchanger
plates but does not support the weight of the plates. In BY frames, the heat exchanger plates hang
from the carrying beam.
CY frame.
A compact frame design of the heat exchanger. The number of heat exchanger plates that can be
stacked is lower in a CY frame than in the corresponding BY frame.
CIP process (Clean-In-Place).
A cleaning process in which the flow channels of the closed heat exchanger are flushed with
specific cleaning solutions.
Compression dimension
“a” Dimension
(“a max.”/“a min”).
Dimension referring to the depressurized plate heat exchanger. Tighten the heat exchanger plate
pack placed between the frame plates to this dimension. Going below the “a min” dimension can
damage the heat exchanger plate pack.
Connection (pipe).
The pipe connections on the fixed pressure plate. The pipe connections have different designs
according to each application.
Data plate.
A label permanently attached to the fixed plate of the PHE frame which identifies the serial
number, design conditions, and other information.
Fixed pressure plate.
The base component of the plate heat exchanger frame. The fixed plate is an unmovable frame
plate. Normally, the pipes are connected to this component.
Flow-through media.
The term for the media that are responsible for the heat transfer in the plate heat exchanger.
Frame plates.
The fixed pressure plate and the loose pressure plate of the plate heat exchanger frame.
Gasket of the heat exchanger
plates.
A component for sealing and separating the heat exchanger plates from each other. These are
attached to the heat exchanger plates before the plates are installed in the heat exchanger frame.
Guide beam (aka the lower
beam).
Component that guides the heat exchanger plates and the pressure plate at the bottom. In CD frames
the heat exchanger plates rest on the guide beam.
Heat exchanger plate pack.
The collective term for all of the heat exchanger plates and gaskets located between the
frame plates.
Heat exchanger plates.
A component that keeps the flow media separated from each other and transfers the heat.
PHE.
Plate Heat Exchanger.
Loose pressure plate.
A movable frame plate suspended from the carry beam of the heat exchanger frame. This frame
plate compresses the heat exchanger plate pack.
Shroud.
A safety device attached to the heat exchanger plate pack, covering the edges of the plate pack to
prevent leaking media from hitting the operator. Aurora generally recommends attaching a shroud
when using hazardous media.
Support leg.
A fixed component of a PHE frame to which the beams are attached.
Tie rod assembly.
The frame component for compressing the heat exchanger plate packs. It consists of tightening
bolts, nuts and washers.
TECHNICAL TERMS