A pressure reducing device (7) for reducing pressure in a fluid, in particular a liquid (L) such as water, preferably for use in an irrigation device, comprises: a) at least one passage element (14) for passage of the fluid (L) between at least one inlet orifice (32) and at least one outlet orifice (38), b) at least one orifice element (19) and c) at least one resilient element (12), d) wherein the passage element (14) and the orifice element ( 19) are movable relative to each other in such a way, that, preferably in a feedback-loop, the inlet orifice (32) is decreased by moving the passage element (14) and the orifice element (19) towards each other in a decrease movement (DM) when the pressure of the fluid (L) is in a first pressure range and/or equal to or above a given pressure threshold, and that the inlet orifice (32) is increased by moving the passage element (14) and the orifice element (19) away from each other in an increase movement (IM), when the pressure of the fluid (L) is in a second pressure range below the first pressure range and/or below the pressure threshold, e) wherein the at least one resilient element (12) supports or causes with its resilient force, in particular upon stretching or compressing deformation, the increase movement (IM) between the passage element (14) and the orifice element (19), f) wherein at least one resilient element (12) is formed as a first bellows (12) having several folds (112), g) wherein an interior space (22) of the first bellows (12) forms a passage for the fluid (L), the folds (112) forming a closed or sealing wall or casing of the interior space (22) impermeable for the fluid (L), h) wherein the first bellows (12) is mechanically connected with the passage element (14) or is mechanically connected with the orifice element (19) or forms at least a part of the passage element (14).L'invention concerne un dispositif de réduction de pression (7) permettant de réduire la pression dans un fluide, en particulier un liqu
