Flap valve with improved retainer

A pump dispenser comprising:

• a tube body, wherein the tube body comprises a first locking aperture and a second locking aperture, opposite the first locking aperture;
• and
• a flap valve situated within the tube body and comprising
• a first portion comprising:
• a circumferential wall;
• an internal valve flap hingedly connected to the circumferential wall, wherein the circumferential wall is spaced from and surrounds the internal valve flap;
• and
• a retaining mechanism comprising a first prong extending upwardly from the circumferential wall and a second prong extending upwardly from the circumferential wall, opposite the first prong;
• and
• a second portion comprising:
• an at least partially annular valve seat;
• a first leg extending upwardly from the valve seat and comprising a first lug extending outwardly therefrom;
• and
• a second leg extending upwardly from the valve seat, opposite the first leg, and comprising a second lug extending outwardly therefrom,
• wherein:
• the first portion is rotatable relative to and the second portion are connectable to configure the flap valve in assembled condition in which at least a portion of the first portion is fit within at least a portion of the second portion for installation in the tube body;
• in the assembled condition, the internal valve flap spans the valve seat;
• and
• in the assembled condition, the circumferential wall and the retaining mechanism are located radially inward of the first leg and the second leg;
• with the flap valve installed in the tube body of the dispenser, the first lug is located within the first locking aperture of the tube body and the second lug is located within the second locking aperture of the tube body;
• and
• with the flap valve is installed in the tube body of the dispenser, the first prong resists radially inward displacement of the first leg and removal of the first lug from the first aperture and the second prong resists radially inward displacement of the second leg and removal of the second lug from the second locking aperture.