Why the comparison starts at your own wash bay
Most feed haulers already have a pressure-wash setup when they start looking at feed truck cleaning equipment. The practical question is therefore not which method is better in general, but whether adding steam to an existing routine earns its cost on your own yard, in your own wash window, on your own tankers. A fair comparison is built around the conditions you can measure: the soil that actually builds up on your equipment, the time between loads, your water and drainage situation, and how you will prove the result.
What each method does in a tanker wash
Conventional cleaning in this context means cold or hot high-pressure washing, with detergents where the site uses them. A pump delivers water volume at pressure; the jet loosens material and the water volume carries it off the surface. A hot-water unit helps with oily film, but the mechanism is still water volume doing the flushing.
Steam cleaning works mainly through heat. A steam machine boils a small amount of water under pressure, and the released steam softens bonded residue so it can be wiped or flushed away with far less water. As an example, the PowerDe HW02 fixed steam cleaning machine is listed at 160°C steam temperature, 0.8 MPa vapour pressure, 6 kW heating power and an 80 L stainless (SUS304) tank on a 220 V supply, with a switch between dry and wet steam. Its product page covers vehicle exterior and engine-compartment cleaning; feed tankers are not listed there, so confirm suitability for tanker surfaces and fittings with the manufacturer before you plan around this model.
Start with the soil you are actually removing
Soil on feed tankers usually falls into three groups, and each group responds differently:
- Loose feed dust and spillage along the top edges, hatches and ladder. This rinses off easily with water volume.
- Caked organic residue where damp feed has clung to panels and seams. Protein and moisture bind it to the surface until heat softens it.
- Road film and grease around hinges, locks, discharge fittings and the chassis.
Write down which group dominates on your fleet. If loose dust is the main problem, a pressure washer is doing the right job and steam adds little. If caked organic residue is what your crews re-wash repeatedly, heat is the variable that changes the result, and that is where animal feed tanker cleaning equipment with a steam mode is worth testing. Dry steam also leaves surfaces nearly dry, which matters around door hardware and electrical connections where a hose leaves standing water.
Six criteria for a fair comparison
Score both options against the same six points, using your own site conditions:
- Wash window. Time how long each method takes on one representative tanker, from start to sign-off. A method that finishes cleaner but misses the dispatch cut-off is not cleaner.
- Water and drainage. Pressure washing consumes volume and produces a large wet run-off. A steam machine boils from a tank, so the HW02's 80 L tank sets the working cycle between refills, and the run-off volume is much smaller. Wherever grease traps or discharge rules apply, confirm what your local authority accepts for either method.
- Surface tolerance. Painted steel, galvanised panels, aluminium and stainless are all common on tankers. Ask the equipment supplier which surfaces and coatings each method suits, and test on a small area before committing a fleet to it.
- Drying time before reload. A wet tanker needs time to drain before it can be loaded again. Low-moisture steam shortens this step; record it as part of the total cycle rather than treating cleaning as finished at the last spray.
- Verification. Agree one acceptance method both sides must pass: a white-cloth wipe over fixed reference points, plus before-and-after photographs taken from the same positions.
- Training and safety. Steam at 160°C needs gloves, face protection and a trained operator; a pressure wand needs hearing, footing and spray-back protection. Include the training time in the comparison, not just the equipment price.
Where each method fits in one wash routine
In practice the two methods divide the work rather than replace each other. A routine that uses both usually runs in this order:
- Dry removal first: sweep or blow loose feed off the top edges and walkways before any water touches the tanker.
- Heat on the crusted areas: apply steam, or hot water where steam is not available, and give it a short dwell time to soften the crust instead of forcing the jet closer.
- Overall wash: work top-down so softened residue is carried off the surface rather than pushed onto panels that are already clean.
- Details: dry steam on hinges, locks, handles and seams where a hose leaves water standing.
- Dry and inspect: a drying wipe, then the agreed white-cloth and photograph check.
Run one side-by-side day before you decide
A single day of comparison on your own yard settles most of this debate. Pick two tankers with similar soil. Wash one with your current method and leave it as the reference. Wash the other with the steam-assisted sequence above. Time each stage, record water use and staff hours, and compare the two results under oblique light with the white-cloth test. If the steam side passes the check in less total cycle time, including drying, the case for adding it to your routine is proven on your numbers, not on a brochure.
What neither method covers
Neither a pressure washer nor a surface steam machine cleans the inside of the tank; that follows your feed-safety and loading rules. Neither one decides wastewater disposal, which stays a matter for the local authority. And do not treat steam as a disinfection step by assumption: ask the equipment supplier to confirm what the method achieves, and how, before you write it into a procedure. If you want a written answer on your tanker surfaces and wash conditions, contact PowerDe with your soil description and site details.
