Check valve ball stop having gasket compression stand off

A check valve comprising:

• a valve housing;
• a valve cover;
• a gasket that seals between the valve housing and the valve cover;
• a ball that fits within the valve housing;
• and
• a ball stop comprising a disc that engages both of the valve cover and the valve housing to limit compression of the gasket as the valve cover is tightened with respect to the valve housing,
• wherein the ball stop engages a ledge formed in the central bore of either the valve cover or the valve housing,
• wherein the ledge positons the ball stop such that the ball stop extends beyond any part of either the valve cover or the valve housing in which the ledge is formed.

A check valve comprising:

• a valve housing;
• a valve cover;
• a gasket that seals between the valve housing and the valve cover;
• a ball that fits within the valve housing;
• and
• a ball stop comprising a disc that engages both of the valve cover and the valve housing to limit compression of the gasket as the valve cover is tightened with respect to the valve housing,
• wherein:
• a ledge is formed in the valve housing,
• the ball stop engages the ledge,
• the valve housing includes a flange,
• the flange includes a flat annular surface that engages the gasket and against which the gasket compresses and seals, and
• the ledge positions the ball stop such that the ball stop is circumferentially surrounded by the flat annular surface and the ball stop extends beyond the flat annular surface to engage the valve cover.

A check valve comprising:

• a valve housing;
• a valve cover;
• a gasket that seals between the valve housing and the valve cover;
• a ball that fits within the valve housing;
• and
• a ball stop comprising a disc that engages both of the valve cover and the valve housing to limit compression of the gasket as the valve cover is tightened with respect to the valve housing,
• wherein:
• a ledge is formed in the valve cover,
• the valve cover includes a flange,
• the flange includes a flat annular surface that engages the gasket and against which the gasket compresses and seals, and
• the ledge positions the ball stop such that the ball stop is circumferentially surrounded by the flat annular surface and the ball stop extends beyond the flat annular surface to engage the valve housing.