AGC ProFlow Pro3-XP, Operation And Maintenance Manual, Page: 11 / 20

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Figure 8
Tightening Location and Sequence
Measure top and bottom as well as front and back. The heat exchanger is designed operate at its
top efficiency when it is closed to a metal to metal condition. This means the rubber plate gaskets are fully
compressed and the plates contact points are fully engaged with each adjacent plate. In this condition, the
plate gap is uniform and the plate is fully supported. To maintain this condition all tiebolts should be
tightened equally and in sequence. Following the sequence shown in figure 8, tighten each tiebolt in small
increments so the follower remains parallel to the fixed end. As the press approaches the start dimension
smaller increments at each bolt will make for easier closing.
After the press is closed and all connections are made to the heat exchanger the unit is ready to be
pressure checked. Consult the onsite plant engineer or project manager for the correct procedure on
pressure testing the press.
Opening the Heat Exchanger:
Before opening this or any other heat exchanger you must verify the temperature in the unit is
below 90° F and that the unit has been relieved of all internal pressure. Failure to follow this safety warning
could result in serious injury to the operator or damage to the plates and gaskets. All pipes/connections
should be disconnected from the heat exchanger before the tiebolts are loosened.
Prior to opening the press, inspect the tiebolts to ensure they are free from dirt or excessive dust
and that lubrication is present on each. Opening or closing the tiebolts without lubrication may cause
permanent damage to the tiebolt. Small increments on each bolt will make the process easier and prevent