What the title actually asks you to decide
"High-temperature steam" is not one setting. On the equipment PowerDe lists, steam temperature and supply voltage are published per model — the fixed PowerDe HW02 steam cleaner page states 160° steam temperature, 0.8 MPa vapor pressure and 220 V working voltage — while other machines in the range carry different duty styles and no published steam temperature at all. Before any guard or housing is exposed to steam, two numbers have to be true at the same time: what the machine can deliver, and what the surface and its neighbours can tolerate.
Confirm the surface, coating and sealing first
Machine guards come in painted sheet steel, powder-coated steel, stainless steel, anodised aluminium, polycarbonate and acrylic sight panels, and mesh with plastic-coated wire. The cleaning questions differ by material, not by the word "guard":
- Coated steel panels — the coating is usually the weak layer. Check for chipping, rust creep at fastener holes, and previously repainted areas where adhesion is unknown.
- Polycarbonate and acrylic windows — steam directed at a sealed edge can force water behind the seal. Clean the panel face, and keep the jet off the edge trim and gasket line.
- Mesh guards with plastic coating — coating that is already cracked lifts under a focused jet, and the exposed wire underneath then rusts.
- Nameplates, labels and cable markers — adhesive and ink are the first things to fail. Cover or mask them before cleaning starts.
Confirm what sits behind and inside the guard
A guard is a cover, not a sealed enclosure. Steam follows the same paths as water and hot air, so the item that gets damaged is usually behind the panel rather than on it. Before cleaning, list what is within reach of the spray: drive cabinets, limit switches, cable glands, conduit entries, bearings and their felt or rubber seals, grease nipples, encoder couplings, sensors and their connector faces. Steam entering a bearing seal displaces grease; steam entering a connector leaves residue that shows up later as an intermittent fault. Where these parts cannot be shielded, clean the panel in sections and stop at the boundary.
Confirm the mode and the machine you are using
The PowerDe cleaning range separates machines by how they are moved and what they produce. The fixed steam cleaning machine HW02 is a 220 V unit with 6 kW heating power, an 80 L SUS304 tank, a tap-water inlet, and switching between dry and wet steam plus a vacuum function — suited to a fixed wash bay with a water supply and mains power. Mobile units are a different decision: the driving style steam cleaner PWD02 and PWD01 and the HMW2 series combine dry steam, wet steam and hot-water modes, and are listed in variants with and without a battery for indoor garages and narrow parking areas.
For guard and housing work, the mode matters more than the headline temperature. Dry steam carries less free water and is the safer choice where the panel has seams, labels or an unknown coating. Wet steam and hot water do the work on heavy soil, but they put real water volume against every opening. Decide which mode you are in before the nozzle touches the machine, and switch modes between areas rather than mid-panel.
Confirm the electrical and safety conditions around the job
Cleaning a guard is a hot-work and wet-work task at the same time. Conditions to settle before the first pass:
- The equipment is stopped, isolated and cool. Steam on a hot surface flashes to a large vapour volume instantly and blows residue into gaps.
- The steam unit's own supply matches the site. The HW02 is a 220 V machine; battery-powered variants exist precisely because some positions have no convenient mains, and those variants change runtime rather than the cleaning physics.
- Protection functions on the machine are working. PowerDe lists leakage, short-circuit, high-temperature, high-voltage and water-shortage protection on several models; treat them as interlocks to verify, not as permission to be careless.
- The operator has gloves that cover the forearm, closed footwear and eye protection. Steam burns at a distance and through clothing.
- Drainage and drying are planned. A guard cleaned standing in a puddle starts corroding within hours at fastener points and hinge hardware.
Run one test on the least visible area
Before committing to a whole line of machines, clean a small area on the inside face of one guard, or on a removed panel, and inspect after it dries. Look for lifting at edges and printed markings, blistering of repair-painted areas, and water at connector entries. That single test tells you whether the coating and the sealing on that particular machine tolerate the setting you chose, which is the decision the title is really about.
If your application involves guards and housings that are not covered by the published figures on the product pages, bring the panel material, the equipment behind it and the soil type to the supplier rather than guessing from a datasheet. PowerDe also lists customised configurations and engineering services alongside its standard cleaning equipment, so a site-specific cleaning setup can be discussed before a purchase is made.
