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We’ve been using the ETZ series for a few years now to dry heavy hardwoods, and the vacuum system is really what makes teh difference — the 4.5m diameter chamber can customiezd to your length, and the design temperature spans from 100°C up to 240°C with a working pressure of 0.3 to 0.4MPa. It’s built from 304 stainles steel with 80mm insulation cotton wrapped in galvanized sheet, so heat stays inside where it’s supposed to, and the inflatable silicone seals usually last a year or two before needing replacement.
What it basically does is pull a vacuum down to -0.098MPa, which drops the boiling point of water enough that you can dry dense wood at lower temperatures without the cracking or shrinkage that plagues conventional kilns. Most buyers bring in oak or walnut boards that are tricky to dry, and they find the forced circulation cooling and spray water system help keep everything even — the PLC controls let you adjust temperature and humidity per species, though you’ll still want to experiment a bit with your own recipe.
Also, the door mechanism is a manual or electric dual opening setup, which is handy when you’re loading a full track that can hold over 12 tons on the 12th rail. The safety features include a double-door interlock and pressrue alarms, so we’re not too worried about operator error, though you should confirm the ASME U, U2, NB, or PED certification matches your local code before ordering.
Lead time is usually 6 to 8 weeks or so, depending on whether we have a unit in stock — we sometimes do, but it’s not guaranteed. The heating method is electric with conducting oil, and the system includes a circulating fan for heat distribution, so you won’t get hot spots in the chamber. 10 kilns or more may get you a discount, but check with us on MOQ for custom lengths.
Anyway, this isn’t meant for small softwood jobs like pine studs where a standard kiln works fine — it’s overkill for that and you’d just waste the vacuum capability. You’ll want a COA from the batch to verify the stainless steel gauge and weld quality, as some offshore units skimp on that detail.
We can start with a single unit for the ETZ Series. Our MOQ is typically one machine, but we’ll work with you on trial orders if needed.
Lead time depends on your length and diameter specs, but we usually deliver within 45 to 60 days from order approval. Custom builds take a bit longer for fabrication.
Yes, we can supply ASME U, ASME U2, NB, and PED certification paperwork. Just let us know which standard your project requires when placing the order.
Absolutely, the 4.5m diameter is our standard max, but we can go larger to fit your specific logs or lumber sizes. Let us know your required diameter so we can adjust the design.
The silicone seal works well for maintaining vacuum down to -0.098MPa and typically lasts 1 to 2 years. You’ll want to check it annually for wear; replacement is straightforward and doesn’t require special tools.
