Oil dehydrator, a system for dehydrating oil comprising an oil dehydrator and a method for dehydrating oil with an oil dehydrator

A method for dehydrating oil with an oil dehydrator, wherein the oil dehydrator comprises a vacuum chamber;

• a vacuum pump arranged at an upper end region of the vacuum chamber for establishing a negative pressure within the vacuum chamber and for fluid transportation of water and air out from the vacuum chamber through an outlet opening;
• a pipe for fluid transportation of oil into and/or out from the vacuum chamber, and where the pipe is connected to a lower end region of the vacuum chamber;
• where the vacuum chamber at the lower end region has at least one flow channel fluidly connecting the vacuum chamber and the pipe;
• and wherein an orifice check valve is arranged between the vacuum chamber and the pipe for controlling the flow of oil into and out from the vacuum chamber through the at least one flow channel, the method comprising:
• applying a negative pressure to the vacuum chamber with the vacuum pump and switching an operational state of the orifice check valve to a closed mode, in which oil is prevented from flowing out from the vacuum chamber,
• drawing oil into the vacuum chamber from an oil reservoir through the pipe and the at least one flow channel, and transporting water and air out from the vacuum chamber with the vacuum pump through the outlet opening,
• stop applying the negative pressure to the vacuum chamber with the vacuum pump and switching the operational state of the orifice check valve to an open mode, wherein oil is flowing out from the vacuum chamber through the at least one flow channel.