Behncke PWT 510 Instrucciones De Operación página 70

Heat exchanger PWT 510 / PWT 910 / Operation
7.6 Cleaning and replacing the plates
To clean and degrease the new seals and receptacles, you need to use acetone. It is very important that
the cleaning product has completely evaporated before new seals are inserted.
7.6.1 Replacing
To replace the seals correctly, you must do the following:
• Pull the seals out of their receptacles (they are not glued down).
• Clean the plate edges.
• Insert the new seals. Should this process prove to be difficult, you can lift the folded plate edge
slightly using a small spatula.
Replacing the seals is really easy with bossed and embossed plates.
7.7 Mounting and assembly
This process can be carried out without any special equipment (torque wrench or similar) and without
strictly adhering to "closing rates". The special design of the plates allows the closing rate (F) to be varied,
depending on the age of the seals and the thermal loads to which the heat exchanger is exposed. The
permissible tolerance range for this measurement comes from the technical data table.
The plates and seals must be carefully inspected before assembly. The plates must be clean, and the
seals must not be soiled with grease or other substances. Sand or any granules on the seals may cause
leaks and damage to the seals. For embossed plates, the seals must always be facing the top of the heat
exchanger. If seals have been replaced or if the heat exchanger has only just been delivered, you must
check whether the device has been assembled in accordance with the minimum spacing specified in the
table on page 3.
During assembly, you must make sure that the fixed plate and the loose plate are parallel. That's why it is
recommended that you measure the distance between the two plates at the top and bottom on both sides.
You must observe the points below when tensioning (see figure 7):
Tighten the nuts in the following order:
PWT 510 1.) 1 – 6 – 3 – 4
2.) 2 – 5
Repeat the process until the desired closing rate has been reached.
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IMPORTANT!
Solvents are dangerous. Do not breathe them in.
Wear suitable protective equipment!
PWT 910
WARNING!
Tensioning too tightly damages the seals and may lead to the expansion
screws breaking. This entails a not-insignificant potential for injury.
WARNING!
Do not stand in front of the drawbars when tensioning.
1.) 1 – 10 – 5 – 6
2.) 2 – 9 – 4 – 7
3.) 3 – 8