Shuttle valve stabilization through pressure differential and shuttle valve with hollow poppet with weep hole

A shuttle valve comprising:

• a valve body comprising:
• a first valve seat defining a first fluid inlet,
• a second valve seat defining a second fluid inlet, and
• a center portion that is connected to the first valve seat and the second valve seat,
• wherein the center portion defines a fluid outlet and a bore;
• and
• a moveable member that is moveable within the bore between a first position against the first valve seat and a second position against the second valve seat, wherein when the moveable member is in the first position, the second fluid inlet is in fluid communication with the fluid outlet and when the moveable member is in the second position, the first fluid inlet is in fluid communication with the fluid outlet, and wherein the moveable member comprises:
• a shell that defines a hollow interior, wherein the shell is configured to have a unitary construction formed of a single component that comprises a first head portion, a second head portion, and a barrel portion disposed between the first head portion and the second head portion, wherein the shell comprises at least one longitudinal groove formed in an exterior surface of the shell.