A system for preserving blood and its components, comprising: a device having: a body defining a chamber; a cover that is hermetically sealable to said body; a source of pressurized xenon; an inlet in fluid communication with the chamber and in fluid communication with the source of pressurized xenon, and being configured to allow pressurized xenon gas to be fed into said chamber from said source of pressurized xenon gas, wherein said inlet includes an inlet duct positioned in said cover, wherein said inlet includes a non-return valve installed into the inlet duct to prevent said xenon gas from exiting said chamber after said xenon gas has passed into said chamber through said inlet, and wherein the non-return valve is formed as a sleeve having at least one aperture in a side wall of said sleeve, and a ring made of elastic material installed in a circular groove arranged on an external surface of said sleeve, the at least one aperture configured to overlap said ring, said sleeve and said ring being located within said cover; and an outlet duct located in said cover, and a lock valve for hermetically sealing the outlet duct, said outlet duct connecting an external side of said cover with an internal side of said cover, wherein said outlet duct includes an inner portion and an outer portion, the inner portion meeting the outer portion at a channel having a cross-sectional area, and said inner portion having a frusto-conical shape with an apex and a base, the channel being located at the apex of the inner portion, and said base opening toward the chamber; a pressure indicator that is configured to indicate pressure in said chamber; and a bag containing blood or blood components, said bag permeable to xenon gas, said bag adapted to be positioned and hermetically sealed in said chamber, said chamber being configured to be filled with pressurized xenon gas so that said blood or blood components in said bag is saturated with said xenon gas. a device having: a body defining a chamber; a cover that is hermetically sealable to said body; a source of pressurized xenon; an inlet in fluid communication with the chamber and in fluid communication with the source of pressurized xenon, and being configured to allow pressurized xenon gas to be fed into said chamber from said source of pressurized xenon gas, wherein said inlet includes an inlet duct positioned in said cover, wherein said inlet includes a non-return valve installed into the inlet duct to prevent said xenon gas from exiting said chamber after said xenon gas has passed into said chamber through said inlet, and wherein the non-return valve is formed as a sleeve having at least one aperture in a side wall of said sleeve, and a ring made of elastic material installed in a circular groove arranged on an external surface of said sleeve, the at least one aperture configured to overlap said ring, said sleeve and said ring being located within said cover; and an outlet duct located in said cover, and a lock valve for hermetically sealing the outlet duct, said outlet duct connecting an external side of said cover with an internal side of said cover, wherein said outlet duct includes an inner portion and an outer portion, the inner portion meeting the outer portion at a channel having a cross-sectional area, and said inner portion having a frusto-conical shape with an apex and a base, the channel being located at the apex of the inner portion, and said base opening toward the chamber; a pressure indicator that is configured to indicate pressure in said chamber; and a body defining a chamber; a cover that is hermetically sealable to said body; a source of pressurized xenon; an inlet in fluid communication with the chamber and in fluid communication with the source of pressurized xenon, and being configured to allow pressurized xenon gas to be fed into said chamber from said source of pressurized xenon gas, wherein said inlet includes an inlet duct positioned in said cover, wherein said inlet includes a non-return valve installed into the inlet duct to prevent said xenon gas from exiting said chamber after said xenon gas has passed into said chamber through said inlet, and wherein the non-return valve is formed as a sleeve having at least one aperture in a side wall of said sleeve, and a ring made of elastic material installed in a circular groove arranged on an external surface of said sleeve, the at least one aperture configured to overlap said ring, said sleeve and said ring being located within said cover; and an outlet duct located in said cover, and a lock valve for hermetically sealing the outlet duct, said outlet duct connecting an external side of said cover with an internal side of said cover, wherein said outlet duct includes an inner portion and an outer portion, the inner portion meeting the outer portion at a channel having a cross-sectional area, and said inner portion having a frusto-conical shape with an apex and a base, the channel being located at the apex of the inner portion, and said base opening toward the chamber; a pressure indicator that is configured to indicate pressure in said chamber; and a bag containing blood or blood components, said bag permeable to xenon gas, said bag adapted to be positioned and hermetically sealed in said chamber, said chamber being configured to be filled with pressurized xenon gas so that said blood or blood components in said bag is saturated with said xenon gas.