PowerDe lists a working steam pressure of 0.8 MPa for only one machine in the Cleaning Equipment Series — the Fixed Steam Cleaning Machine PowerDe HW02. Every other steam model in that series publishes dimensions, heating power, tank volume and cleaning modes, but no steam-pressure figure at all. That gap is not an accident, and it is the single most useful thing to notice before you put a number into a specification sheet or a purchase order.
As a buyer, you are not supposed to take a published number on faith. The steps below are the ones we would follow ourselves when a purchaser asks us what "published specification" actually means, and where a number has to be confirmed in writing.
What counts as a published specification
A published specification is a value printed in the Specification table of a product page, in the language and on the domain you are buying from. For the powerde.net English catalogue, that table sits under the Overview, characteristic and Appearance sections on each product page. Values in the Overview prose, in a blog post or in a sales e-mail are supporting material — they are not the same thing as a line in the specification table, and they are usually harder to trace back later.
On the HW02 page the table records steam temperature 160°, vapor pressure 0.8 MPa, heating power 6 kW, tank volume 80 L in SUS304, tap-water inlet with a 4-point internal-tooth joint (1/2 inch), dry steam and wet steam modes with a vacuum cleaner, and 220 V working voltage. Those are the values you can quote. Note that the page writes "vapor pressure", not "working pressure" — that wording difference matters, and we come back to it below.
Step 1: Find the exact model page, not the series page
The Cleaning Equipment Series listing opens on the model names, and model names in this catalogue are not unique identifiers. The fixed machine at Fixed Steam Cleaning Machine PowerDe HW03 is titled "HW03", while the Overview on that same page calls the machine "PowerDeHMW3 (220V)". Its Specification block, in turn, carries the same dimensions, heating power and tank volume as Hand Pushed Steam Cleaning Machine PowerDe HMW3 (without battery), with the difference sitting in the power-supply line: 220 V on one page, a 48 V battery on the other.
Two practical conclusions. First, record the product URL and the model string exactly as printed, because a purchase order that says "HMW3" could point at a battery model or a mains model. Second, when a name and a specification block disagree, send the disagreement back to the supplier and ask which one is correct. A supplier who cannot answer that question in writing is not going to answer harder questions about pressure and temperature later.
Step 2: Read the units and the wording carefully
0.8 MPa is about 8 bar, or roughly 116 psi. If your own team or your local reseller works in bar or psi, write the conversion down next to the original figure instead of replacing it — a dispute is much easier to settle when the supplier's original unit is still on the page.
Ask, and get an answer in writing, where that pressure is measured: at the boiler, at the pump, or at the nozzle after the lance and hose. The published specification table on the HW02 page gives the value but not the measurement point, and the difference between boiler pressure and nozzle pressure is normally large. The same applies to the 160° figure: the page does not state whether that is the steam generation temperature or the temperature delivered at the nozzle, and steam cools as it leaves the machine. Nothing in this article replaces that confirmation.
Step 3: Match pressure to the duty you actually have
Pressure is not the deciding parameter on its own; the machine's published pressure has to sit inside the range your own cleaning duty needs, and the supplier has to confirm that fit. If you have no written cleaning specification, write one before you ask for a quotation. It does not need to be long:
- The surfaces: painted bodywork, engine compartment, workshop floor, exhaust hood, machinery housing — each behaves differently under hot steam.
- The soil: loose road film, baked-on brake dust, cutting oil, cooking grease, or biological residue. Grease and oil respond to temperature far more than to pressure alone.
- The volume: how many units per shift, and how many minutes per unit.
- The utility you can actually supply: socket rating, water inlet, floor drainage, and whether a fixed 220 V machine can be parked where the work happens.
For the cleaning duty the HW02 page describes — vehicle exterior at fuelling stations and parking lots, interior vacuuming and disinfection, and engine-compartment work — the published pressure and temperature are stated values on a machine built for that duty. For any duty outside that description, request confirmation from the manufacturer rather than transferring the figures across.
Step 4: Do not borrow a number from a similar model
This is where most purchasing mistakes happen. The Driving Style Steam Cleaning Machine PowerDe PWD01 (including battery) adds a hot-water mode to the dry and wet steam modes, runs on a 48 V mobile battery, and publishes dimensions of L2500 × W900 × H1050 mm, 4.5 kW heating power and an 80 L clean water tank — with no pressure row and no temperature row at all. The same is true of the hand-pushed HMW3 page. So if a quotation offers you a mobile or hand-pushed machine and quotes 0.8 MPa because that is the figure printed elsewhere in the catalogue, you are comparing against a number that page does not publish.
The right question is blunt: "What steam pressure does this exact model produce, measured where, and where is it documented?" If the answer arrives as a revised datasheet, good. If it arrives as "same as the other model", treat it as an unconfirmed claim and ask for it to be written into the offer.
Step 5: Ask for the documentation that backs the number
For a published specification, ask the supplier for:
- A datasheet or drawing that carries the same pressure value as the page, with the model string from the order on it.
- The pressure-relief and safety devices fitted to the machine, and the setting of the relief valve.
- Which protections are on the unit. The HW02 page lists leakage protection, short-circuit protection, high-temperature protection, high-voltage protection, water-shortage protection and high-voltage explosion protection. Ask for them item by item rather than accepting a count.
- The acceptance method you will both sign: what you will measure on arrival, with what instrument, and what reading passes.
A supplier running its own machine development and testing work should be able to produce the first two items without difficulty; the PowerDe catalogue carries the machine series under PowerDe cleaning equipment, and engineering work such as hardware testing and customised equipment work is offered alongside it.
Step 6: Confirm the number in the order, not in the chat
Put three things in the proforma invoice or contract: the exact model string and product URL, the steam pressure and temperature with units and measurement point, and the acceptance test that confirms them. A specification that never reaches the contract is a marketing line, and the buyer carries the difference.
One last habit worth keeping: archive the page you read. Take a dated copy of the product page you quoted from. Catalogue tables get revised, and the archived page is what settles a later argument about what was published at the time of purchase.
If you want the published figures checked against the duty you are planning, send the surface list, the soil type and the shift volume to the PowerDe sales team at sales@powerde.net and ask them to reply with the datasheet for the exact model, including where the steam pressure is measured. If a pressure figure is missing from a page you are reading, that is not a reason to assume it — it is a question to put in writing before the order is placed.
