What builds up, and why it matters
On this kind of work the problem is carbonized product, fat, starch, sugar residue and burnt-on build-up. Dry ice leaves no chemical residue on a food contact surface, and no water in a place where standing water is a sanitation problem. That is the whole reason it is used in food production.
Cleaning is usually scheduled around sanitation and production windows. The people who call us about meat processing equipment are usually sanitation and plant managers, and the thing they are actually worried about is a chemical residue finding its way onto product.
The method
Why dry ice and not the alternatives
- Non-abrasive
The pellet is soft and sublimates on impact, so the work is thermal rather than mechanical. Machined faces, plating, paint and gaskets survive it.
- Low moisture
No standing water in a harness, a bearing or a cabinet, and no dry time before the equipment goes back into service.
- No secondary waste
Sand, soda and walnut shell all have to be swept and hauled. Dry ice leaves only the contaminant it removed.
- Often no teardown
Much of this work is done in place, which is usually where the real saving is. The labor is in the disassembly, not the cleaning.
More food work
Related jobs we get called for
Questions we get asked first
Will it damage the surface underneath?
On most substrates, no. The pellet is soft and sublimates on impact, so it does thermal work rather than mechanical work. We still test an inconspicuous spot first on anything unusual.
Do you have to take the equipment apart for meat processing equipment?
Usually far less than you would expect, and often not at all. Cleaning in place is where most of the saving comes from, because the labor is normally in the teardown and reassembly.
How much mess does it make?
Far less than the alternatives, because the blasting media disappears. What is left is the contaminant itself, which we contain and clean up.
Do you come to us?
Yes. The whole rig is mobile. Compressor, hose and operator arrive at your shop, plant, driveway or dock, anywhere across South Florida from Miami out to roughly a hundred miles.
What does a job cost?
It depends on the equipment, the contaminant and the access, so we will not throw a number at you over the phone without understanding the work. Describe the job and we will give you a real figure.
How soon can you look at it?
Send photos and a short description and one of the owners gets back to you. If you have a shutdown or a deadline, say so up front and we will tell you honestly whether we can hit it.
The comparison
Why not just pressure wash it
- Media blasting
Grit removes material to do its job, so a machined face or a plated part pays for the cleaning.
- Pressure washing
It is fast and it is wet, which is fine outdoors and unusable on anything with a winding in it.
- Solvent and degreaser
Softens the contaminant but leaves a film, fumes and a disposal problem, and attacks finishes you meant to keep.
- Hand scraping
Fine on a patch, hopeless on a machine, and the blade leaves its own evidence.
- Dry ice
The deposit shrinks away from the surface it is stuck to and releases. The ice is gone before it can do any harm.
What comes off
What comes off, and why
If it is bonded to the surface rather than part of it, there is a good chance this takes it off. The list below covers most of what we are called out for.
- Paint and coatings
Removed selectively where the substrate underneath has to survive, which rules out most abrasive approaches.
- Salt and corrosion product
A constant in South Florida. Removing it without stripping the protective finish is the whole trick.
- Ink and printing residue
Ink and coating on anilox and press rollers, surfaces where changing the texture changes the print.
- Food residue
Carbonized product build-up in a plant where neither standing water nor a chemical film is acceptable.
- Grease and oil
Oil film is the layer everything else sticks to. Remove it and half the job is already done.
- Carbon and soot
Baked carbon on a manifold, oven or weld fixture. Thermal shock is exactly the wrong thing for the bond holding it on, which is why this works.
- Adhesive and sealant
Cured sealant, old gasket, tape glue and sound deadening, the residue left when something was removed but its bond was not.
How a job runs
Nothing about this should be a surprise
Nobody should have to guess what they booked. This is every stage of a job in the order it happens.
- We blast, then clean up
The ice is gone on impact. What is on the floor afterward came off your machine, and clearing it is ours to do.
- You look before we pack up
A second pass while everything is still connected is free in every sense. A return trip is not.
- You describe the job
The machine, the deposit and the downtime you can afford. Those three things decide the whole job, and we would rather know all of them before quoting.
- We look at access and containment
The layout decides the method more often than the contaminant does. We work out reach and containment before quoting anything.
- We test a small area
An out-of-sight patch comes first so pressure and pellet size are proven before anything that shows. Soft alloys, older paint and bare metal each want different numbers.
What to expect on site
We cover what should not be hit before anything gets blasted. It takes minutes and saves arguments.
Solid carbon dioxide leaves no residue at all. What it does do is displace air, so an enclosed space gets ventilated as part of the job rather than as a precaution added later.
The process is loud. Hearing protection is standard for anyone in the working area, which is why you will see ear defenders in most of our photographs.
Cold surfaces are the one aftereffect. Depending on the piece that is either a few minutes of patience or some condensation while it returns to room temperature.
Send us the job.
Tell us what the machine is, where it is and what is on it. A photo or two speeds it up. One of the owners calls you back.