Start with the duty cycle, not the catalogue page
Heavy-duty transport trucks are not washed the way a sedan is. Mud packs the chassis frame and wheel wells, grease and road film sit on the fifth wheel and landing gear, and tanker or bulk bodies carry residue that a cold rinse simply smears. Before you compare any two machines, write down your own numbers: how many trucks a day, how many of them arrive with caked-on load, how long the wash bay or yard lane is available, and whether water can run off where you work. Those four answers narrow the shortlist faster than any specification sheet.
Question 1: What is actually on the truck, and how thick is it?
Road dust comes off with pressure and detergent. Compounded grease on axles, springs and kingpins does not. When your fleet includes tankers, mixers or construction haulers, ask a supplier how their heavy-duty steam cleaning machine handles set grease, and whether the machine supplies sustained high temperature alongside pressure. Hot water loosens grease so the operator spends fewer passes on the same panel. On PowerDe's fixed unit HW02, that capability is expressed as dry and wet steam modes, which let the operator switch between a hotter, drier pass on greasy surfaces and a wetter pass on open panels.
Question 2: Does the supply match where the trucks are washed?
A 220 V mains-fed unit is straightforward in a covered bay with a proper circuit. If washing happens in a yard, under a canopy, or at a loading dock without fixed plumbing, the same requirement becomes an obstacle, and mobility decides what the crew can realistically reach. Compare the commercial steam cleaning equipment in the range by mode of movement: the driving style PWD01, PWD02 and HMW2 units are built to be moved under their own power through narrow garages and tight outdoor parking spaces, and each is listed both with and without battery, so a battery-less variant can stay near supply while a battery version covers a longer route. The hand-pushed HMW3 moves on foot instead, which suits a fixed wash pad.
Question 3: How are the tanks, water inlet and consumables handled?
Ask how much clean water the machine carries, what the tank is made of, and what the inlet needs. The HW02 page lists an 80 L SUS304 tank and a tap-water inlet with a 4-point internal-tooth joint, so the site either has a hose run or the crew refills. Ask the same questions for every model before you compare them; if a supplier cannot state tank volume, material and inlet fitting in writing, treat that as a gap in the offer, not an oversight.
Question 4: What happens when the crew, not the machine, is the weak link?
On a night shift with two operators and a queue of trucks, an unfamiliar machine costs more than a slightly lower output rating. Ask for a live demonstration on your own dirtiest truck, and time it. Watch how long it takes to switch between modes, how heavy the gun and wand feel after thirty minutes, and how the unit is started, refilled and shut down. Ask what protection functions exist for electrical and water faults; PowerDe's product pages describe leakage, short-circuit, high-temperature, high-voltage and water-shortage protection on several models, and you should still confirm the exact set for the model you are quoting.
Question 5: Which numbers on the sheet can you verify?
For the fixed HW02, the detail page publishes 6 kW heating power, 160° steam temperature, 0.8 MPa vapour pressure, a footprint of 1,200 × 800 × 1,200 mm including handles, and 220 V working voltage. Use those figures as a worked example of what to request for every candidate: heating power, steam temperature, delivered pressure, tank capacity, dimensions and power supply. Then ask how each was measured and whether an independent check is available at your site. Do not accept a specification that is not written down, and do not assume a figure from one model transfers to another.
Question 6: What is the supplier's role after delivery?
Fleet washing schedules rarely match a catalogue configuration. Ask whether the manufacturer can alter the configuration, and how they handle spare parts and fault support for a machine that has to run six days a week. Shenzhen PowerDe Automation Precision Equipment presents itself as a manufacturer of intelligent cleaning equipment with customized configurations and technical support behind it, which is worth testing directly: describe your bay, your truck mix and your shift pattern, and ask what changes they propose and what they quote for them.
Score the answers side by side
Put the six questions into a simple table and give every supplier the same truck to clean. Record passes per panel, minutes per truck, water and power used, and operator feedback at the end of a real shift. The PowerDe cleaning equipment range is worth putting through that test against competing offers, because a machine that fits a heavy-duty duty cycle is decided by measurement on your own yard, not by brochure wording.
