If your enquiry to a cleaning-equipment supplier cannot answer those three questions with something you can verify on site, the machine will sit idle after delivery. The list below follows the order most factories actually use: scope, technical fit, access, safety, then proof and support.
1. Define the cleaning scope before the machine
Send the supplier photographs of the actual surface, not a generic word such as “machinery”. One line on the machine base, one line on the guide rail, one line on the surrounding floor. A vendor who has cleaned machine tools will immediately tell you which of those three items changes the machine selection.
- Contaminant type: cutting fluid and coolant residue, way oil and grease, mixed dust and chips, or food and sugar residue.
- Substrate: painted steel, stainless, cast iron, anodised aluminium, seals, cable sheathing, display panels.
- Water tolerance: which parts must stay dry, and where wastewater can be collected and discharged.
- Working window: cleaning inside the machine enclosure, during a planned break, or on a weekend shutdown.
This scope decides whether you need a steam-only unit, a hot-water unit, or both. Cutting oil on an enclosure cleans well with heat plus mechanical action. Way oil that has soaked into a machined surface usually needs dwell time before wiping. Mixed dust and chips may require a low-pressure rinse before steam is applied. Ask the supplier to name the sequence for your photographs, not a general cleaning method.
2. Match technical parameters to the cleaning task
Heat, pressure, water volume and power supply are separate controls. They are frequently sold together as one specification, and that is where purchases go wrong.
- Steam temperature does the work on grease. Heat softens the oil film so it releases from the surface instead of smearing. Compare the temperature delivered at the nozzle with the temperature at the boiler; the numbers differ as the unit runs.
- Pressure does the work on residue that has dried or bonded. High steam pressure can push oil into bearings and gaps, so for machine tool steam cleaning, ask which pressure setting the supplier recommends for surfaces near open ways and electrical connections.
- Dry steam or wet steam is the practical difference. Dry steam carries less water, which reduces runoff on a machine that cannot be washed down. Wet steam carries more water and moves debris faster on an open frame or floor.
- Tank volume and duty cycle determine how much work one fill supports. A small tank is an advantage in a tight aisle and a problem on a long machine line.
- Power source must match what is where. A mains-powered fixed unit suits a wash area with a stable supply. A battery-powered mobile unit suits positions without an outlet nearby, and it adds charging and battery-handling routines to the shift plan.
For comparison: the fixed steam cleaning machine in the PowerDe range, model HW02, is published with 6 kW heating power, 160 °C steam temperature, 0.8 MPa vapour pressure, an 80 litre SUS304 tank, and a 220 V supply. Those parameters point to a stationary wash position, not a unit carried along a machine line. A supplier that gives you a specification sheet without stating where the unit is meant to stand has answered the easy half of the question.
3. Check access, mobility and the physical layout
Walk the route with a tape measure before signing anything. Machine cleaning fails more often on geometry than on power.
- Machine footprint and overall height, including handles, against your aisle width and doorway height.
- Hose and wand length against the distance from the parking position of the machine to the far end of the equipment being cleaned.
- Weight and wheel type against floor surface, drainage channels, ramps and expansion joints.
- Whether the unit is pushed by hand, driven, or fixed in place. A driven mobile steam cleaning machine makes sense when the cleaning area moves across a yard or parking area; a hand-pushed unit is easier to control inside a plant.
4. Confirm safety, protection and compliance
A high-temperature unit in a plant with oil residue and electrical equipment is a safety project, not only a cleaning tool. Ask for the protection functions in writing and confirm each one on the delivered machine.
On the PowerDe cleaning machines, the published descriptions list leakage, short-circuit, high-temperature, high-voltage and water-shortage protection, and the HW02 page adds protection against high-voltage explosion. Ask the supplier which function you can test yourself, how the machine behaves when it triggers, and how the operator knows the difference between a fault and a normal stop.
- Required PPE for the nozzle, the steam plume and the hot surfaces after shutdown.
- Rules for using steam near electrical cabinets, sensors, cable trays and open bearings.
- Wastewater route: an oil-skimming or settling step may be needed before discharge to drain.
- Any change to machine cleaning procedures that must be reflected in your maintenance and EHS documents.
5. Demand a cleaning trial with pass criteria you can measure
Do not accept a demonstration on a clean test panel. Ask for a trial on one of your own surfaces, on a dirty machine, with the following recorded: time from cold start to working steam, cleaning time for one defined area, water consumed, residue left after wiping, and any damage to paint, seals or labels.
Write the pass criteria before the trial so the result cannot be argued afterwards. A useful format is one sentence per surface, with the person responsible for the sign-off named. If the supplier will not run a trial, treat it as a technical answer they cannot give.
6. Check consumables, service and lifetime support
- Nozzles, seals, hoses, wands, filters and heating elements: part numbers, stock location and price.
- Water quality requirement and descaling interval. Hard-water scaling is the most common cause of lost steam output.
- Battery and charger replacement terms, where the model uses a battery.
- Warranty scope, response time, and who pays freight for a returned part.
- Operator training in your language, plus a written procedure your team can keep on the machine.
7. Price it as a cleaning operation, not as a machine
Add up labour hours per clean, water and energy, consumables, downtime, and disposal of the rinse water. A unit that costs more to buy but completes one machine line inside one shift change can be cheaper per clean than a lighter unit that needs two people and a second pass. Put the trial numbers into that sheet, because the trial is the only figure in the purchase that comes from your plant rather than the vendor's slide.
Buyer checklist before the purchase order
- Photographs of the actual surfaces sent, and the supplier's cleaning sequence in writing.
- Temperature, pressure, dry/wet steam mode, tank volume and power supply matched to the task and the position.
- Aisle, doorway, hose reach and floor route measured, not estimated.
- Protection functions listed, and the test method for each one confirmed.
- Trial pass criteria agreed before the demonstration.
- Consumable prices, service response and training terms attached to the quotation.
- Model, serial number and full specification sheet named in the purchase order and inspection record.
For a plant cleaning several different machines, it is usually worth asking the supplier to separate the answer into two duties: a fixed wash station for parts that can be removed, and a factory machinery degreasing setup that works on the equipment in place. That split keeps the specification honest, and it stops a single machine being asked to do a job it was never designed for.
