User Guide
|
Plate Type Heat Exchangers, Single plate & Semi-welded - Installation, Commissioning and Maintenance
© Danfoss | DCS (ms) | 2019.07
BC172686461130en-000201 | 7
Description
(Continued)
Right (R)/ Left (L) plates
Plates are designed in such a way that they can
be used both as right and left plates by
alternately turning them 180°. Semi-welded
cassettes are not turned.
Right and left plates, Single plates:
On a right plate the flow runs from porthole 2 to
3 or reverse from porthole 3 to 2.
On a left plate the flow runs from porthole 1 to 4
or reverse from porthole 4 to 1.
The opening of the corner portholes is described
in a “plate code index”. For instance 1234 means
that all corner portholes are open. Every plate
can be identified by the gasket configuration, the
plate code index, and the plate geometry (e.g.
thermal short or thermal long geometry).
Fig. 5. Single plates: Left and Right plates and flow
Fig. 6. Semi-welded plates (cassettes) have no Left and Right plates. Refrigerant always flows in port 1 and 4
1
2
4
3
R
L
R
1
2
4
3
Cassettes x N
(total number of plates 2xN+2)
Connections:
1, 4: Refrigerant side, *Ring gasket high
2, 3: Brine side, *Ring gasket low
Flow arrows shown are only indicative
Connections:
1, 4: Brine 1
2, 3: Brine 2
Flow arrows shown are only indicative
Head
Brine flow
Field gasket
Follower
Ring gasket
Refrigerant flow
Ring gaskets h/l*
First plate:
Single plate
with no gaskets
Last plate:
Single plate
without portholes
Single plates x N
Follower
Last plate:
plate without
portholes
Each plate rotated
180° relative to plate
before/after
Standard gasket
Used on all plates
except first
First plate:
Special gasket
All portholes gasketed)
Head
