A comparison sheet that lists four machines and four prices is not a comparison. It tells you what each unit costs, but not whether any of them will clean your floor, fit through your door, or run a full shift without someone refilling a tank. Before you send a comparison to a purchasing manager or a plant manager, fill in the installation facts that decide whether the machine works in your building: where the water comes from, where the run-off goes, what power is available at the wash point, and how far the operator has to walk.
The sections below are the items I would put in that comparison, in the order they usually cause trouble. They apply whether you are comparing PowerDe cleaning equipment against another supplier or comparing two of your own quotations.
1. What is being cleaned, and how dirty is it really
Start the comparison with the soil, not the machine. Three kinds of build-up behave differently, and the difference changes what temperature and pressure you need. Loose dust and spilled material come off with heat and a little force. Compacted mud and dried slurry need more dwell time. Sintered grease and oil film on a heated surface are the hard case: they need sustained heat to soften before pressure does anything useful.
In the comparison table, write one line per area you intend to clean, naming the soil and how long it has been sitting. A row that says "clean the equipment" gets an answer that is impossible to compare. A row that says "grease film on the drive side of the line, rebuilt between weekly cleans" gets a real one.
Mode switching belongs in this row too. Dry steam carries less free water, which matters near electrical cabinets, bearings, and anything you do not want to soak. Wet steam transfers more heat and flushes lifted soil, but leaves more water behind. If a quotation does not state whether the unit switches between the two, and how quickly, that is a gap in the comparison — not an omission you can fix after delivery.
2. Power supply at the wash point, not in the plant
This is where most installation comparisons fail, because the specification sheet is read in an office and the machine is installed next to a drain. For a fixed unit, confirm the supply voltage against what actually exists at the wash point. The PowerDe HW02 steam cleaner detail page lists a 220 V working voltage and 6 kW heating power, which means a proper fixed supply at the position — not an extension lead run across a wash bay from the far wall.
Battery-powered mobile units remove the cable, and you should compare them as a different installation shape, not as an optional accessory. They move the constraint from the socket to charging space, charging time, and runtime per charge. Runtime and charging figures are not published on every listing; the hand-pushed steam cleaning machine page states the working supply as a 48 V battery and a 4.5 kW PTC heater, but it does not publish battery capacity or runtime. Put that in the comparison as a question to be answered in writing for the exact configuration, with the same wording carried into the purchase order.
3. Water inlet and tank capacity
Ask whether the machine takes a mains water inlet or must be filled by hand. The HW02 page lists a tap-water inlet with a 4-point internal-tooth joint and an 80 L SUS304 tank. Those two facts together decide the plumbing work at your site: an inlet means a run of pipe and a fitting at the wash point, while a fill-only tank means someone carries water on a schedule you have to build into the shift.
Tank size belongs in the comparison as a labour question rather than a number to admire. A smaller tank on a mobile unit is a reasonable design choice; the cost is refill trips, and the cost lands on whoever is operating. When you compare two units, compare tank capacity against the length of the area being cleaned, and note the distance from the nearest refill point to the far end of that area.
4. Drainage and run-off handling
Steam uses far less water than a pressure washer, but the run-off is not clean. It carries oil, grease, grit, and whatever was on the surface. Your comparison should record three facts: where the water goes today, whether that route is allowed for oily run-off in your jurisdiction, and what you would have to build if it is not.
Local discharge rules commonly restrict oil and suspended solids entering a foul or storm drain. Confirm what your site is permitted to discharge before you choose a machine, because an interceptor, a contained wash pad, or a collection tank is a construction cost that dwarfs the difference between two quotations. Where there is no drainage at all, note it as a design constraint: the job becomes smaller sections with tighter water control, and dry-steam mode becomes the working default.
5. Floor, doorways, and the route the operator walks
Walk the route with a tape measure before you compare prices. Steps, ramps, drainage gullies, wet floors, tight aisles, and door widths decide whether a fixed unit, a hand-pushed unit, or a driving-style unit suits the site — and the choice between those shapes changes the installation more than any option on the quotation.
Use published dimensions rather than assuming. The HMW3 hand-pushed listing gives L1150 × W520 × H1030 mm, which is enough to test against a doorway or an aisle on the floor. A unit that fits the doorway but cannot be pushed over a ramp with a full tank is not a fit. Note in the comparison whether the wash area must stay in service during cleaning, because that changes the route as well.
6. Surfaces and components that must stay dry
Every installation comparison should carry a list of items that are excluded from steam. Sealed bearings, belts, laminated nameplates, painted panels, optical sensors, linear guides, ball screws, encoders, and electrical cabinets all need shielding or a different method. Hollow frames, breather-equipped gearboxes, and horizontal guideways trap water and can flash-rust on machined surfaces, so the comparison must also include the drying or re-lubrication step that follows cleaning.
Write the exclusions into the document, not into someone's memory. If the machine is later moved to a new line, that list is the reason the move is safe or unsafe. Confirm ingress protection ratings and permitted surface temperatures with the equipment owner's documentation before you decide what can be sprayed.
7. Protection functions and operator safety
High-temperature steam is a trained tool. Steam escaping a lance can injure an operator in seconds, and a wet floor is a fall hazard for everyone else in the area. List protection functions by name — leakage, short-circuit, high-temperature, high-voltage, and water-shortage protection appear on these listings — and ask for confirmation in writing that they apply to the configuration being quoted.
Then put the commissioning test in the comparison: each protection function is verified on your machine at your site, before sign-off, with the result recorded. A protection function you have never tested is a line in a brochure.
8. Downtime, spares, and service response
Ask what happens when the machine is down, and write the answer into the comparison before you sign. Which consumables and wear parts do you hold on site — hoses, nozzles, seals, heating elements, brushes? How long does a spare take to arrive in your country, and who is allowed to open the machine without voiding support? If cleaning is on the critical path for a shift change or a vehicle turnaround, one week without support has a cost that should sit alongside the purchase price.
9. The trial that settles the comparison
Ask for a trial on your own soil, on your own surface, with your own operator. Take one representative panel that has been allowed to build up to the worst condition you actually see, and clean it with the method you are considering. Record four things: the time from cold start to a usable lance, the time to clean the panel, the water used, and what the operator changed without being told to. Before-and-after photographs from the same position at the same lighting are worth more than any data sheet.
Define what "clean" means for each area before the trial, so the result can be judged rather than debated. For some areas a visual pass is enough. For others you will want a wipe test, a white-glove check, or a documented hygiene requirement agreed with whoever owns that standard at your site. A cleaning machine removes soil; it is not by itself a disinfection or sterilisation procedure, and if a customer or auditor sets a hygiene standard, get it in writing and agree the inspection method with them.
10. What to send the supplier before they quote
A comparison is only as good as the information the supplier started from. Send the following with your enquiry, and the quotations you receive will be comparable:
- The areas to be cleaned, the soil in each, and how long it accumulates
- Photographs of the wash point, including the drain and the nearest power outlet
- Supply voltage available at the wash point and the distance to it
- Whether a mains water inlet is available, and where run-off currently goes
- Door widths, aisle widths, steps, and ramps on the route to the work
- Time allowed per clean, per shift, and who will operate the machine
- The items that must not be sprayed, and any hygiene standard you must meet
With those facts, a supplier can recommend a machine shape — fixed, hand-pushed, or driving-style — instead of guessing. If your site needs something outside a published configuration, that is a configuration question for the supplier's engineering team rather than a modification to bolt on afterwards; customized steam cleaning equipment starts with a written brief of the conditions above.
The line items that matter most
If you only have space on the sheet for five rows, use these: what soil each machine must remove; the power and water actually available at the wash point; where run-off goes and what it costs to treat; the route and the machine shape that fits it; and what happens on the day the machine is down. Price belongs at the bottom of a comparison like this, because it is the one item that can be negotiated after the others are settled.
Shenzhen PowerDe Automation Precision Equipment Co., Ltd. publishes its cleaning-equipment listings, application pages, and contact details on its site, along with engineering services covering product development, hardware testing, and equipment customization. Use the published parameters for a first pass, and put every number your decision depends on into the trial record.
