A maintenance or purchasing manager comparing cleaning options usually gets quoted very different numbers. One vendor sells a pressure washer. Another sells a high-temperature steam cleaning machine. A third offers a chemical bath plus a manual wipe line. Before any of those quotes are comparable, you have to pin down what is being cleaned, what the residue actually is, and what happens to the machine the moment cleaning stops.
The question set below is the one we suggest putting to every supplier of factory machinery degreasing equipment. Each question has a specific answer you should be able to write down and compare line by line.
1. What is the residue, and how thick is it?
"Grease" covers a wide range of material. Light cutting oil, hardened way oil, mixed grinding sludge, and baked-on lubricant from a heat-treating line all behave differently under heat and pressure. Ask your supplier what the machine is rated to remove, and give them a sample condition: how long the grease has been sitting, whether it has been re-heated, and whether it carries abrasive fines.
A supplier who answers with a single product name instead of a residue discussion is not qualifying your job. On our side, we ask for photos of the fouled surfaces and the machine layout before we recommend a model, because that decision changes both the steam mode and the operator workflow.
2. What temperature and pressure can the machine hold at the nozzle, not in the boiler?
Nameplate figures for a tank are easy to print. The number that matters is what reaches the surface after the hose, the wand, and a long cleaning session. Ask for steam temperature and vapor pressure as published specification values, and ask how they are measured.
For reference, the published specification for the Fixed Steam Cleaning Machine PowerDe HW02 lists 160° steam temperature and 0.8 MPa vapor pressure, with 6 kW heating power and an 80 L SUS304 tank on a 220 V supply. Those are the figures we publish for that model; you are entitled to the equivalent line from any vendor and should hold all of them to the same standard.
3. Dry steam, wet steam, or hot water — and can one machine switch between them?
Grease needs heat to release. Surfaces then need enough water volume to carry the released grease away. Dry steam supplies high heat with low moisture, which suits electrical enclosures, panels, and areas where you do not want standing water. Wet steam and hot water supply the flushing volume that clears sludge from a frame or a base plate.
Ask whether the machine offers both modes and how the operator changes between them. A mode switch that takes a shutdown and a hose change costs you cycle time on every job; a mode switch at the gun or the panel is a normal part of the workflow.
4. How much water does the job consume, and where does the run-off go?
Water volume is a hidden cost in plant cleaning. It is hauling, drainage, floor drying, and sometimes a permit question. Steam-based low-water steam cleaning equipment works with far less liquid than an open hose wash, and the resulting run-off is a smaller volume of concentrated grease rather than a large volume of diluted wash water.
Ask each supplier: liters per hour at the working mode you intend to use, and how they expect you to contain and dispose of the run-off in your facility. If your plant has no floor drain in that bay, that answer decides the equipment class.
5. Does the method touch bearings, electrical parts, and ways?
The failure mode of aggressive washing is not a dirty machine; it is water driven into a bearing, a way cover, or a connector. Ask the supplier what they advise for bearings, guideways, control cabinets, and encoder areas, and whether their guidance is written down in an operating procedure.
A supplier who tells you exactly what to avoid, and gives the operator a sequence for those zones, has thought about your machine. A supplier who only tells you how fast the spray removes grease has not.
6. What is the machine's own downtime between cleaning jobs?
Compare heat-up time to reach working temperature, tank capacity, and how the machine refills and recovers. A unit that reaches working temperature slowly between two short cleaning windows costs more operator time than a unit that is slightly more expensive to buy.
Ask for the tank volume and the heating power together. Those two numbers, plus your shift plan, tell you how many machines a plant needs.
7. What safety protections are built in?
A steam unit combines high temperature, pressure, and electricity. Ask which protections are fitted and how they are specified: leakage protection, short-circuit protection, high-temperature protection, high-voltage protection, and water-shortage protection. The HW02 page lists these protection items together with high-voltage-explosion protection.
Put the protection list in writing next to each quotation. If a low quote omits protections that every other bidder includes, the price difference is the missing hardware.
8. Mobile, hand-pushed, or fixed — which fits this plant?
Cleaning several machines in one bay with a fixed unit means hose length, cable length, and the operator walking back to the machine. A fixed unit on a 220 V supply suits a repeatable cleaning station. A hand-pushed unit covers a wider floor area without installation work.
Ask the supplier which configuration they would install at your layout, and why. If the answer does not mention your bay dimensions, drainage, or power supply, request a re-quote against a drawing of the area.
9. Is the supplier the manufacturer, and what do they do with your test data?
Ask whether the equipment is built in-house, and what happens if your residue does not clear with the standard configuration. Shenzhen PowerDe Automation Precision Equipment is an intelligent cleaning equipment manufacturer that also offers equipment customization, engineering services, and hardware testing — which means a non-standard fouling case can be tested and configured rather than sold as-is.
A trading vendor who cannot test your sample will still sell you something. Ask for the test result in writing.
10. What does the cleaning procedure look like after the sale?
The machine is one line in a budget. The other lines are operator training, a written cleaning sequence for each machine type, spare-nozzle stock, and service response. Ask which of these are included and which are extra.
A useful closing question: "Show me the cleaning procedure an operator follows on day one." If the vendor cannot produce something concrete, you will be writing it yourself while your equipment is idle.
A comparison sheet you can fill in on one call
Write these ten values down for every quotation: published steam temperature; vapor pressure; heating power; tank volume; working voltage; water consumption in the mode you will use; available steam modes; protection list; machine footprint and movement type; and what is included for training and service.
Two quotations that look far apart in price usually converge once these ten values are side by side. The differences that remain are real engineering differences, and at that point they are worth paying for.
If you want your own fouling case tested and configured rather than guessed, send photos of the machine and the residue to PowerDe and request a configuration proposal for your layout: contact PowerDe.
