Ask a maintenance manager which cleaning method they use on a factory floor and you usually get two answers: pressure washers and degreaser, or a rag and time. Both work. Both are slow in ways that never show up on the quote, because the cost hides in labour hours, machine downtime and the number of passes it takes to finish one bay. The comparison below is the one we suggest running before anyone changes a method: same zone, same deposit, both methods, timed.
What each method is actually doing to the deposit
Manual degreasing is a chemistry-first method. A spray or wipe puts solvent or alkaline cleaner onto the surface, the chemical needs a few minutes to break the bond between grease and metal, and a brush or pad supplies the mechanical action that lifts it. Manual degreasing works well on small, accessible parts and on deposits that a jet would simply spread, such as dust mixed with oil on an electrical enclosure.
Steam is a heat-first method. An industrial steam cleaner puts high-temperature vapour into the deposit, which softens it and breaks its adhesion; pressure then moves the loosened material off the surface. On the PowerDe HW02, the published figures are 160° steam at 0.8 MPa with 6 kW of heating power, which is why a short dwell on old grease is often enough: the heat does the slow part of the work, the water pressure only has to sweep the result away.
That difference is what decides which method wins on a given task. A deposit that has baked on over weeks responds to heat far faster than to solvent. A deposit that is loose but spread across a wide area responds to water volume, not to chemistry.
Set up the comparison so it can be believed
The mistake most plants make is comparing a good day with one method against a bad day with the other. To get a result a purchasing manager will accept, run the two methods side by side, in the same zone, on the same shift, with the deposit in a comparable condition.
- Pick two areas on the same machine or the same line that carry a similar level of soil, and photograph both before anything starts, with a reference object in frame.
- Use your current method on one area and steam on the other, with the same number of operators and the same starting equipment for each.
- Record every minute, including preparation, product protection, dwell time, the wait for a surface to dry, and clean-up. Preparation is where manual methods usually lose, and it is the number most people leave out.
- Note rework: how many areas had to be treated twice, and how long the second attempt took.
- Record the consumables each method used, so the comparison includes what you buy each month, not only what you pay in wages.
Two timed rounds on paper give a plant a comparison no supplier claim can match, and they expose the parts of the current method that everyone has simply learned to live with.
Time and labour per task
On heavy, baked-on grease the manual route runs: apply, wait, scrub, wipe, rinse, repeat. Each cycle costs minutes and physical effort, and the number of cycles is set by the deposit, not by the operator’s enthusiasm. Steam shortens that loop because the dwell is doing the work a brush would otherwise do; the operator holds the wand closer and moves it slower than they would with a cold jet, works in overlapping passes, and the deposit releases in fewer passes.
On loose contamination the opposite is often true. A machine covered in dry swarf and cutting-fluid mist needs the bulk debris removed first; steam onto loose swarf turns it into a paste that travels into the places you are trying to protect. In that case manual removal plus vacuuming stays in the workflow, and steam becomes the second stage rather than the whole job.
Chemical handling, storage and disposal
A manual degreasing programme carries a supply chain nobody budgeted for: the drum, the storage area, the safety data sheets, the training on handling, the gloves and respirators, the spill kit, and the waste stream that the used solvent becomes. Each of those has an owner and an audit date. Steam degreasing equipment shifts most of that burden: tap water goes in, and the run-off still carries the grease and has to be collected and disposed of through the site’s waste-oil route, but there is no chemical inventory to manage and no solvent vapour in the room.
For plants working to ISO 14001, REACH or customer audit requirements, the reduction in chemical inventory is often the argument that closes the decision, independent of the time saving.
Water use and drying time
A cold pressure washer puts litres on a floor; dry steam puts a fraction of that. The HW02 runs from an 80 L tank and switches between dry steam and wet steam, so an operator puts heat into a vertical or overhead surface with the drier mode and rinses with the wetter mode only where it is needed. On a shop floor that has to be walked, the practical benefit is drying time: a surface that received steam rather than a hose flood returns to use sooner, and the slip hazard window shrinks accordingly.
Where the plant has no drainage at the cleaning point, low-water cleaning becomes a requirement rather than a preference, and that constraint alone usually decides the method.
Surface and component safety
Both methods have surfaces they damage, and the risks are different. Solvent attacks paint, plastics, seals and adhesives, and it can be applied with precise control. Heat and pressure attack the same class of components in a different way: they lift labels, blister coatings, find their way past seals and into electrical housings, and can drive water into a bearing.
The discipline for steam is written down and trained: close doors and way covers before spraying around them, keep the nozzle away from encoder scales, wipers, bearing seals and electrical enclosures, cover anything in the splash zone, and test a small inconspicuous area on any surface the machine has not cleaned before. A rag costs nothing to control; a wand at 160° costs a great deal if it is aimed badly.
Downtime, not minutes, is the number that matters
Cleaning minutes only matter if the machine is stopped for them. Manual wipe-down can be done around a running cycle, which is why it survives in plants that cannot afford a shutdown. A steam task with protection, run-off containment and a drying wait usually needs a window. The comparison therefore has to be run against your real idle minutes, not against an ideal day.
Where the plant has fixed power, tap water and drainage, a fixed steam cleaning machine can sit at the wash point and be used in short planned sessions. Where the crew has to work along a line or across several bays, a mobile unit from the cleaning equipment series avoids dragging hoses and cables across aisles, which is where most of the hidden time in a steam trial actually goes.
Cost: put it per square metre, not per machine
Compare the two methods on the same basis: cost per square metre cleaned, including labour minutes, consumables, protection and clean-up, and the downtime the task consumed. A steam machine has a capital cost and an energy cost against a 6 kW heater, offset by the consumables and waste handling a chemical programme carries each month. A manual programme looks cheap per shift until the rework hours, the sick days and the audit time are counted.
Keep the figure sheet from the trial. It is also the document you hand to the equipment supplier when a duty cycle, a tank size or an accessory needs discussion, because it tells them what your plant actually consumes.
Which method to choose, task by task
A practical answer, based on what the deposit is rather than on what the plant already owns: loose debris and dust, remove mechanically first, always. Light oil film on guarding and machine exteriors, either method works; choose whichever fits the idle window. Baked-on grease, cutting-fluid residue and oil stained floors, steam usually wins on time and on chemical handling. Electrical enclosures, sensor housings and anything with an open seal, controlled manual cleaning. Long runs of floor and bay, steam, because drying time keeps the area walkable.
Most factories end up with both: a low-water method for the machine surfaces and a fixed or mobile steam unit for the heavy work that used to run on solvent and a brush. If your trial shows that split, customized cleaning equipment can be specified around your line layout and duty cycle. Send the photographs and the timing sheet to the contact page and ask for a configuration quote rather than a catalogue page.
