Water hiding in pressed oil turns it cloudy, shortens shelf life and makes it spit in the pan. Dewatering-cooling combos drive moisture out with staged heating, then chill the dry oil for filtering — 50 to 150 kg per charge, with vacuum-tank versions that dewater at lower temperature to protect color and flavor.
Moisture enters oil from the seed itself and from hydration washing. Dissolved water is invisible when warm — then the oil cools, the water comes out of solution, and the bottle turns hazy. Worse, water accelerates rancidity and makes oil spatter dangerously when heated. Specification-grade oil is dry oil.
The combo machine heats oil gently with banked 1 kW elements until moisture flashes off, then switches to cooling so the dry oil reaches filtering temperature without sitting hot. Vacuum versions pull moisture out at reduced pressure — lower temperature, faster cycles, and no oxidation darkening; a small oil-water separator protects the vacuum pump.
| Model | Charge Range | Heating | Size |
|---|---|---|---|
| 100 jin dewater-cool | 10–40 kg | 6×1 kW | 61×80×172 cm |
| 200 jin dewater-cool | 25–80 kg | 6×1 kW (2 kW option) | 156×105×75 cm |
| 300 jin dewater-cool | 35–120 kg | 6×1 kW | 120×60×200 cm |
| Vacuum tank 100/200/300 jin | to 150 kg | 6×1 kW + vacuum pump | 61–120 cm dia. range |
Moisture removal and cooling happen in sequence on the same machine — no transfers, no waiting tank.
Six 1 kW elements heat evenly without local scorching; elements are individually replaceable.
Vacuum versions boil water off below normal temperature — faster, gentler on color, and oxidation-free.
Pump-equipped versions move oil continuously for quicker, more even dewatering and faster discharge.
Vacuum models ship with an oil-water separator on the pump line — the small part that saves the expensive one.
Cloudiness that appears as oil cools, spattering or foaming in the pan, and shortened shelf life are the classic signs. If hydration washing is part of your line, dewatering afterwards is essentially mandatory.
Vacuum dewaters at lower temperature, protecting color and aroma, and cycles faster — worth it for retail-grade oil. Standard atmospheric versions cost less and suit oil destined for further refining.
Depending on charge size and starting moisture, typically 1–3 hours including the cooling phase. Vacuum versions run meaningfully faster at the same charge.
Brief, controlled heating to drive off moisture has minimal effect — and vacuum versions avoid even that by boiling water off at reduced temperature. Prolonged open-pan boiling is what darkens oil.
After pressing and degumming (hydration), before winterizing or final filtration. The built-in cooling stage hands the oil to your filter at the right temperature automatically.
Tell us your raw material, daily capacity and budget — our engineers will recommend the right configuration and send a factory-direct quote within 24 hours.
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