A procurement team that buys cleaning equipment for medical-equipment exteriors usually gets a brochure, a price and a promise. What it rarely gets is a written statement of what the supplier assumed about the housings, the surfaces, the room and the power. The medical equipment steam cleaning line on our site is deliberately short on promises for exactly that reason, so the questions below are the ones we expect a serious buyer to ask us — and the ones worth putting in front of every supplier before a sample unit is ordered.
Start with the equipment list, not with the machine
"Medical equipment exteriors" is not one job. The outside of a trolley, the casing of a monitoring unit, a bed frame, a wheel set, a wall-mounted dispenser and the housing of a imaging or diagnostic unit all behave differently under heat, pressure and moisture. A supplier who cannot get a list cannot size anything. Send the makes and models you actually have, with a photograph of a typical unit and of the dirt you are trying to remove, and ask the supplier to respond unit by unit.
Ask, in writing, which surfaces the supplier will not recommend steam for. Any answer that names nothing is a warning sign. Sealed electronics, display assemblies, sensor windows, adhesive-mounted labels, bearings, cable entry points and any opening the manufacturer of the equipment tells you to keep dry are the kind of items that should appear on that exclusion list, and it should be attached to the quotation rather than left in a chat message.
What the supplier should ask about the surfaces
A supplier's first set of questions should be about what the steam will touch. Expect to be asked for the enclosure materials, the ingress-protection marking printed on the housings, whether the housings are removable for cleaning or cleaned in place, and what the equipment maker's own cleaning instructions say. If the equipment maker lists specific permitted agents and forbids others, send that page as well — a supplier who ignores it is not doing engineering.
Then come the practical surface questions: how far the housings sit from walls and from each other, whether there are underside overhangs where water collects, whether the equipment is moved by hand so that wet surfaces carry moisture into corridors and lifts, and whether any part of the item is painted, filmed or labelled in a way that a hot jet can lift. Our hand-pushed steam cleaning machine page describes cleaning and disinfecting hospital beds and medical machinery; it does not claim that every housing in a hospital tolerates the same treatment, and no honest supplier will claim it either.
The dry-steam question decides the recommendation
Ask what steam content the machine delivers at the nozzle, and how the machine switches between a drier output and a wetter one. On housings that must stay close to dry, a drier steam output is normally the only sensible choice; a wet jet aimed at a vent is a way of destroying equipment you were trying to keep clean. Our hand-pushed models are specified with dry-steam and wet-steam modes, with a PTC semiconductor heater rated at 4.5 kW and a 50-litre clean-water tank, and a 48 V battery as the working power supply. Those figures describe capacity, not the result in your corridor, and the point of asking the question is to make the supplier commit to which mode is intended for which of your items.
Ask how long the machine needs to reach working temperature, how long it runs at that temperature before it needs a refill or a recharge, and what happens to the output at the end of a shift. A machine that runs out of hot water halfway through a round leaves the last items in the round half-cleaned, and that is the failure mode teams actually complain about.
Pressure, temperature and distance from the nozzle
Ask for the delivered steam temperature and vapour pressure, and then ask what standoff distance and what nozzle the supplier expects the operator to hold. Pressure and temperature are only half of the story; what reaches a plastic housing is controlled by the nozzle, the distance and the time spent on one spot. A supplier who can answer this for your specific housings has probably run a trial. A supplier who recites the machine's rating has not.
Put one question to them in plain words: which of my items would you clean with the nozzle at 30 centimetres, which at a metre, and which would you wipe by hand instead? A useful answer splits the list. A vague answer means the trial will be paid for twice.
How the supplier should handle moisture control
Moisture, not heat, is what damages housings. Ask how the supplier proposes to keep water out of vents, connectors and displays: nozzle choice, a defined sequence that works from the top down, a dry wipe immediately after steam, and a stated drying time before the item is returned to service. Ask who writes that sequence down, and ask for it as a one-page instruction your own staff can follow without the supplier present.
Then ask where the water goes. A steam job produces runoff, and in a clinical or care building the route matters — floor drainage, slip risk, and whether the item is cleaned in place or moved to a designated wash point. That decision belongs to the facility, and a good supplier will ask you about it rather than assume it.
Power, water and the room the machine lives in
A supplier who recommends without asking about the room is guessing. Send the supply situation — available socket rating, whether battery operation is required in occupied areas, cable-run distance from the store room to the items — and the water situation — whether a tap with the right fitting is available, and how the tank is refilled. The hand-pushed model runs on a 48 V battery with a tap-water inlet using a 4-point internal-tooth fitting, which means your side has to confirm the fitting and the fill point, not the other way round.
Ask about the machine's own footprint and travel: our hand-pushed unit is listed at roughly 1150 mm long, 520 mm wide and 1030 mm high. That has to pass the doorways, lifts and corners between the store room and the equipment. Measure with a tape before anyone signs, because a machine that cannot reach the work is a machine that sits unused.
Safety features worth asking about one by one
Electrical and thermal protection is where a supplier either shows their engineering or does not. Ask specifically what the machine does on earth leakage, on short circuit, on overheating, on high voltage, and on water shortage, and ask what the operator sees when each of those happens. Our mobile and hand-pushed listings name leakage, short-circuit, high-temperature, high-voltage and water-shortage protection; the useful follow-up questions are what a protection means in practice — does it stop the heater, stop the pump, or only light an indicator.
Then ask for the commissioning sheet: a single page that lists each protection and a tick box confirming it was demonstrated in your building, with your signature on it. Any supplier who has built equipment for institutional use will have that document; the ones who have not will tell you it is unnecessary.
Who pays for the trial and what it has to prove
Ask whether the supplier will run the machine on your own equipment, in your own room, with your own staff. If they will, fix what the trial has to record before it starts: the time per item, the number of items per tank and per charge, the drying time before return to service, any visible damage or lifted labelling, and what the operators thought of the handling. One round on your list tells you more than any brochure, and it also protects you, because a supplier who refuses to trial is telling you they have not run this job before.
Documentation and after-sales questions
Ask what paperwork arrives with the machine: instructions in the language your staff read, a spare-parts list with the parts that wear out named, warranty terms with the exclusions written out, and the service route — who attends, from where, and in how many days. Ask which consumables and wearing parts you should hold in the building rather than order, because a machine out of service waiting for a small part is what makes a cleaning programme fail quietly.
Ask what training the supplier provides and how many staff can be trained, and ask for the training record to be written down. Institutional equipment fails when only one person knows how to run it.
What the answers tell you about the supplier
The purpose of all these questions is not to find the highest specification. It is to find out whether the supplier has thought about your housings or only about their machine. A supplier who returns a unit-by-unit answer, an exclusion list, a written moisture-control sequence and a commissioning sheet is selling an outcome. A supplier who returns a price and a datasheet is selling a box, and the trial cost falls on you.
If you want the comparison to be fair, give every shortlisted supplier the same equipment list, the same room description and the same power and water facts, and ask all of them the same nine questions above. The answers will differ more than the prices do. Shenzhen PowerDe Automation Precision Equipment has built cleaning and automation equipment in Shenzhen since 2007, and through our contact page we will answer it item by item, including the items we would not put steam near.
