1. The parts and the soil, before the machine
Start with a physical sample of the part and an honest description of what is on it. Cutting fluid and way oil behave nothing like pressed drawing compound, and nothing like the carbonised residue baked onto a component that has been through a heat treatment or engine run. Ask the process owner three questions and write the answers down:
What was the last fluid the part saw? What is the heaviest soil the process realistically leaves behind, not the cleanest case? And what does the next operation require — a clean surface for welding, bonding, coating, assembly, or dimensional inspection?
These answers determine whether you need high-temperature steam, hot water, or a combination. Industrial steam cleaning equipment works on baked-on grease because the heat, not the water volume, breaks the bond — which is why a steam unit can clean with far less water than a pressure washer. Where the soil is loose swarf and free oil, hot water flushes faster and cheaper. A survey that skips this step is the reason so many cleaning projects stall in trial: the equipment is adequate for the wrong soil.
2. Part geometry, fixtures and blind cavities
Walk the line with the part in hand and note every cavity, drilled passage, thread, blind hole and seam where fluid can be trapped. Automotive parts are full of them. A bore that accepts a steam lance is straightforward; a cored passage the lance cannot reach is not, and it needs flushing, disassembly, or an upstream change. Record whether parts are cleaned loose on a rack, in a basket, on a pallet, or in place on the machine — machine tool steam cleaning in place is often the only option for a large machining centre, but it puts far more demand on containment than taking the part to a wash bay.
Also note what is sensitive. Bearings, seals, electrical connectors, bearings with felt dust covers, glued nameplates and painted surfaces all react badly to direct high-pressure steam. The survey should list every component on or near the part that must be masked, removed or protected, and who is doing that work.
3. Utilities actually available at the point of use
This is the section most often skipped and most often fatal. Measure, do not assume:
- Electrical supply at the socket, not the panel rating — voltage, phase and available breaker capacity. Some units run on a standard 220 V supply; mobile battery-powered machines remove that constraint entirely but trade it for run time.
- Water: is potable tap water available within hose reach, and is the fitting a standard tap connector? Steam units consume surprisingly little water per hour, but they need a continuous supply during a shift.
- Floor space for the machine plus its footprint when handles, hoses and the operator are included, and whether the route from store to line passes doorways, ramps or threshold strips narrower than the machine.
- Drainage: where the run-off goes, and whether it is permitted to carry oil and swarf into the surface-water drain.
For a fixed installation, the Fixed Steam Cleaning Machine PowerDe HW02 runs on a 220 V supply with a 6 kW heating element, an 80 L SUS304 water tank and a tap-water inlet, and switches between dry and wet steam with a vacuum function — a configuration typical of a station in a bay rather than a portable canister. For a shop that cannot run a cable where it needs to clean, the driving-style battery machines in the same range move to the work instead.
4. The constraints: downtime windows, throughput, cycle time
Ask how long the line can actually be stopped. Cleaning a machining centre between shifts is a 40-minute job; cleaning one over a weekend shutdown is a different technology choice. Write down the target cycle time per part or per machine, the number of operators available, and whether cleaning happens in-line, off-line, or in a dedicated bay. Then convert that into a required throughput and check it against what the survey observed, not what the vendor promised.
Drying matters as much as washing here. Parts that must go straight to assembly, welding or coating cannot leave the station wet, and steam has a real advantage in this respect — dry steam carries far less free water than a pressure washer, so parts are workable much sooner. Note the acceptable residual moisture at the next station, and whether compressed air, wiping, or a short dwell is allowed.
5. EHS, containment and the chemicals on the sheet
High-temperature steam is a scald hazard and a slip hazard, and the survey should capture who will be trained, what PPE is mandatory, and how the wet zone will be barricaded and signed. If any detergent will be used alongside steam, take the safety data sheet and check it against your wastewater permit — the whole selling point of steam is often that the detergent can be dropped, so record the current chemical list as the baseline you are trying to reduce.
Capture extraction and ventilation where steam is used in an enclosed space, and note housekeeping access: the machine itself needs cleaning, and a survey that ignores this quietly adds labour.
6. Acceptance criteria agreed before the trial, not after
Put the pass/fail definition in writing before any demonstration: the visual standard, the residue or cleanliness test the quality team will accept, the maximum allowable moisture, and the target time per part. On a wet-steam or in-place job, decide who judges the result and on which parts, including the awkward ones. Then insist on a witnessed trial on your own parts, on your own site, against those criteria. A machine that performs brilliantly in a supplier's showroom on a sample chosen by the supplier has told you almost nothing.
Finally, ask what happens when your product changes. New alloy, new drawing compound, new line layout. A supplier able to re-tool the process — and a manufacturer of PowerDe cleaning equipment with engineering and customisation services behind the hardware — is worth more than a lower quotation that only works on today's part.
The short version
Six items belong in the file before anyone talks price: the part and its worst-case soil; every cavity and every sensitive component; the utilities measured at the point of use; the real downtime window and cycle time; the EHS and containment picture; and a written acceptance test to be run on your parts on your line. Complete that, and the equipment decision almost makes itself. Skip it, and the trial becomes the survey — expensive, slow, and usually decided by whichever vendor got there first.
