The present invention relates to a pressurization device, in particular of the type used for high hydrostatic pressure. More particularly, the present invention relates to a pressurization device (1) comprising a casing (4) provided with a closure (3) and housing a pressurization chamber (15), the device (1) being provided with pressurization means for putting the pressurization chamber (15) under pressure, characterized in that the pressurization chamber (15) is sealed by means of a plurality of annular seals (19a, 19b, 19c) arranged in series on the lateral surface of the pressurization chamber (15) at predetermined relative distances (D1, D2) which are correlated with the coefficient of compressibility of the liquid filling the pressurization chamber (15).