Leak rate reducing sealing device

A method of controlling flow of a fluid via a sealing assembly, the method comprising:

• engaging a flow control body of the sealing assembly with a sealing device of the sealing assembly to prevent fluid flow through the sealing assembly, the sealing device including a primary engagement feature configured to contact the flow control body upon engagement of the sealing device with the flow control body, the primary engagement feature having a front surface exposed to the fluid, the sealing device including a secondary engagement feature disposed behind the primary engagement feature relative to the exposed surface, the primary engagement feature and the secondary engagement feature forming a first cavity therebetween, the sealing device further including a third engagement feature disposed behind the secondary engagement feature, the third engagement feature forming a second cavity successive to the first cavity, wherein the first cavity and the second cavity have different volumes;
• injecting the fluid into a component and preventing flow of the fluid through the sealing assembly by the primary engagement feature, the fluid applying an external pressure to the primary engagement feature;
• and
• based on a leak of the fluid through the primary engagement feature into at least one of the first cavity and the second cavity, causing a reduction of fluid pressure in at least one of the first cavity and the second cavity relative to the external pressure.