Check valve

A check valve, comprising:

• a clevis;
• a hinge pin;
• a hinge configured to be rotatably coupled to the clevis by the hinge pin, the hinge comprising:
• a first hinge member comprising a male interlocking feature;
• and
• a second hinge member defining a female interlocking feature corresponding to the male interlocking feature, the second hinge member configured to be detachably coupled to the first hinge member, wherein the first hinge member and the second hinge member when coupled together define a single opening having a non-circular cross-sectional shape that includes a straight inner wall section and a curved inner wall section;
• and
• a disc configured to be detachably coupled to the hinge,
• wherein the disc comprises a stem portion having a non-circular cross-sectional shape that corresponds to the opening defined by the first and second hinge members such that the disc is prevented from rotating relative to the hinge when secured within the opening, and
• wherein, when the first hinge member is coupled to the second hinge member, the male interlocking feature of the first hinge member is received in the female interlocking feature defined in the second hinge member to prevent angular separation of the first and second hinge members about the hinge pin.