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Frequently Asked Questions
What does removing every gasket buy?
A much wider operating envelope.
Limits are set by the plate metal, not elastomer.
Temperature and chemical ceilings rise sharply.
Aggressive media become possible.
Recurring gasket replacement disappears.
So does one whole failure mode.
How does it differ from a brazed unit?
It can be opened.
Bolted side panels expose each flow path.
Mechanical cleaning and inspection become possible.
A brazed unit is sealed for life.
Fouling there means replacement.
That access is the whole reason to choose this.
What flexibility is given up?
The ability to change duty later.
A gasketed unit accepts added or removed plates.
A welded block is fixed for its life.
An evolving process should weigh that early.
The answer afterwards is a new exchanger.
Allow margin at purchase if change is likely.
Which duties is it chosen for?
Aggressive chemicals and high temperature.
Solvents that would attack any gasket.
Duties where a gasket failure would be serious.
Chemical processing is the natural home.
Clean benign duties do not need it.
Specify by the media, not the duty.
How is it cleaned?
Mechanically, through the side panels.
Each flow path is reachable once open.
Chemical cleaning in place is also usual.
The welded construction tolerates stronger agents.
Cleaning frequency follows the process.
Access clearance must be allowed around it.
What happens if a plate leaks?
It becomes specialist work.
Plates cannot simply be pulled and replaced.
Specialist welding or replacement are the options.
Lead time can be significant.
Ask about it before committing.
Critical duties may justify a spare unit.
What does a supplier need to quote?
Both media and their full temperature range.
Design and operating pressures.
Material compatibility for the plates.
Fouling expectations and cleaning regime.
Space available including panel removal.
Any code or certification requirement.