What “clean” has to mean before you judge any machine
Walk into the back of a brewery and the word “clean” is used in at least three different ways. Operations staff mean that spills are wiped up and drains are clear. Maintenance means that no product is caked on a bracket, valve mount, or frame channel. Quality and audit teams mean something harder to see: that a surface will not carry dried residue into the next brew run, and that the cleaning step itself leaves no film, no standing water, and no debris behind.
That gap is why equipment decisions in brewing so often stall. A machine that satisfies the first definition may fail the third. Before comparing any cleaning technology, write the standard down for each area you intend to clean, and state it in observable terms. For an exterior, that usually means: no visible deposit, no slippery film on the floor around the equipment, no residue left in seams and weld joints, and no water pooled where people or forklifts move.
Step 1: Map the exterior zones you actually have to clean
Brewery equipment exteriors are not one surface. They are a set of very different jobs, and each job should be evaluated on its own:
- Stainless tank shells, fittings, and valve hardware that are sprayed or splashed during transfers and CIP cycles.
- Frame steel, skids, legs, and platform edges that collect dust, malt fines, and dried splashes over weeks.
- Motors, gearboxes, and drive units where any oil or grease film changes what an inspector sees.
- Hoses, cabling, brackets, and the small horizontal ledges where water and debris sit between cleanings.
- Floors, drains, and wall bases immediately around the equipment, which are judged as part of the same visual picture.
Once the zones are listed, the evaluation question becomes concrete. Instead of asking whether a machine is “good for breweries,” ask whether it removes dried sugar and protein residue from a vertical stainless surface without damaging seals, and whether it leaves the floor around it safe enough to walk on.
Step 2: Match the cleaning medium to the soil, not to the habit
Most exterior cleaning in a brewery fails on soil type, not effort. Dried sugary or proteinaceous residue, grease from drives, and mineral scale from hard water all behave differently under heat, pressure, and chemistry. This is the point where high-temperature steam deserves a serious look, because it changes two variables at once: the surface gets heat, and it gets very little water.
For exterior work, the practical value of steam is that it softens and lifts bonded residue so a short dwell and a wipe or rinse replace hard scrubbing. Because the water volume is low, the equipment does not get flooded, and the surrounding floor does not turn into a washdown area. PowerDe’s own positioning for steam equipment points in exactly this direction: cleaning efficiency while reducing water use, labour intensity, and reliance on chemical detergents. For an exterior-only scope, that is usually the deciding argument.
It is equally important to say what steam is not. It is not a substitute for internal CIP. It does not clean inside a vessel, a plate heat exchanger, or a closed circuit. A buyer should treat any proposal that mixes interior process cleaning and exterior housekeeping into one machine claim as a signal to ask for a clearer scope.
Step 3: Score the machine against six practical criteria
The following six criteria are the ones that decide whether a unit survives in a real brewery rather than only on a demo day. Weight them for your site, and test each one on your own worst surface.
- Soil removal on bonded residue. Put the machine in front of a tank shell that has not been deep-cleaned for a month and see whether the deposit lifts without aggressive scraping.
- Mode control. Being able to switch between drier steam and wetter steam, or between steam and hot water, is what lets one operator handle stainless, painted frame steel, and floors without changing equipment. The mobile hot water and steam cleaning machine PowerDe PWD02 is listed with dry steam, wet steam and hot water modes, which is the pattern to look for.
- Water load. Low-volume cleaning protects bearings, electrical enclosures, and the floor. Ask how much water the process actually puts on the surface, not what the tank size is.
- Mobility in your aisles. Brewery layouts are tight, with drains, curbs, and pallet routes in the way. Measure your own aisle widths and turning space before accepting any footprint.
- Safety design. A unit working near water, heat, and electricity should show leakage, short-circuit, high-temperature, high-voltage and water-shortage protection on its spec sheet. PowerDe publishes these protections on several of its cleaning models.
- Service access. Ask what fails, how fast a worn nozzle, seal or hose is replaced, and whether parts are stocked. Downtime is the cost nobody prices at purchase.
Step 4: Run a side-by-side trial on your own equipment
Do not accept a demonstration on a clean test panel. Ask for a trial that compares the candidate machine with your current method on the same surface, on the same soil, on two consecutive cleanings. Record four things: time spent, water used, whether the finish of seals and painted surfaces is unchanged, and whether the floor is usable immediately afterwards. A comparison that only measures cleaning speed will always favour the highest-pressure option and will hide the water and slip cost.
A useful trial also settles the labour question honestly. Steam shifts the work from scrubbing to dwell-and-lift, which changes who can do the job and how long they can do it without fatigue. If your current routine depends on one experienced technician’s muscle, a machine that reduces scrubbing is a staffing argument, not just a hygiene one.
Step 5: Ask the supplier for documentation, not assurances
Any serious evaluation ends with paperwork. Before signing, request the published parameters for the exact model number you are buying: steam temperature, working pressure, heating power, tank volume, power supply, and the dimensions of the unit including handles. Ask what is not on the sheet — hose length, nozzle options, runtime on battery versions — and get those answers in writing. Then ask about the cleaning equipment series as a range, so you know whether a fixed unit, a hand-pushed unit, or a driving-style unit fits the areas you mapped in Step 1.
If your site has unusual constraints — a mezzanine with no floor drain, a brew hall that must stay dry between batches, an exterior that has to be cleaned inside a production window — a manufacturer that builds customized steam cleaning equipment can change the configuration rather than asking you to change the building. That conversation is worth having early, because it is far cheaper to specify a machine than to re-plumb a brew hall.
Shenzhen PowerDe Automation Precision Equipment Co., Ltd, established in Shenzhen in 2007, manufactures steam, hot-water, vacuum and integrated cleaning equipment alongside its automation and process equipment lines, and supplies engineering and customization services around them. For a brewery exterior programme, that combination means one supplier can be asked for the machine, the parameters, and the configuration change in the same enquiry.
Questions buyers actually ask
Will steam damage stainless or painted frames?
Stainless is the easy case, and most of the risk sits with painted steel, decals, cable glands and seals. Test the machine on a hidden section of frame and on one seal before clearing it for general use, and use the drier steam mode on anything electrical.
Can it replace the washdown hose?
For equipment exteriors and surrounding floors, in most breweries a low-volume steam or hot-water unit can take over the routine work. The open hose usually stays for floors that need bulk water removal, and for anything outside the mapped scope.
How do you justify the capital cost?
Do it on the numbers your trial produced: labour hours per cleaning, how many cleanings per week the schedule now supports, water and detergent consumption, and whether a production area can be cleaned inside a shift instead of being shut down. That is the version of the business case a plant manager and a finance reviewer will both accept.
