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Compression Bolts, Rails and Frames
Frame hardware wears. Tie bolts corrode and gall, carrying bars wear where plates hang, roller assemblies seize and port linings erode.
Tie bolts. The most commonly replaced frame item. Seized or stretched bolts make the pack impossible to tighten evenly, which causes leaks that look like gasket failures.
Carrying and guide bars. Plates hang and slide on these, and worn bars let the pack sag out of alignment. That misalignment shows up as uneven gasket compression.
Custom frames. Where a unit is beyond economic repair or a competitor's exchanger needs replacing, a custom frame can be built to drop into the existing foundation and pipe run, avoiding concrete and piping modifications.
Typical Specification
- Tie bolts: Most commonly replaced frame item
- Carrying bars: Wear where plates hang and slide
- Guide rails: Keep the pack aligned
- Roller assemblies: Ease movement of large plate packs
- Port linings: Protect the frame from erosion and corrosion
- Movable frame: Slides back for pack access
- Custom frames: Drop-in replacement for existing installations
- Symptom: Uneven compression often traces to frame wear
- Identification: By unit serial number
- Inspection: Frame checked at every service
Common FAQs
Not necessarily. Seized or stretched tie bolts and worn carrying bars both cause uneven compression, which presents exactly like gasket failure. Check the frame before regasketing a second time.
Frequently. Custom frames can be built to land on an existing foundation and pipe run, which avoids concrete work and piping modifications. Send the footprint, connection locations and duty.
If they are eroded, yes, because their job is protecting the frame itself. Replacing a lining is far cheaper than repairing a frame that has been eroded through.
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