Travel stop for diaphragm regulator valve

A diaphragm type regulator valve including a first and a second casing and an elastomeric diaphragm separating said casings;

• a pusher post in said first casing and operatively coupled to one side of said diaphragm for travel therewith;
• valve means for regulating flow in a flowpath, said valve means comprising a movable valve disc and linkage means coupling said valve disc to said pusher post, said linkage means comprising an axially movable valve stem connected to said valve disc and a pivotably mounted flat, sheet metal lever coupling said valve stem and said pusher post for transmitting forces between said diaphragm and said valve disc, both said pusher post and said lever having bifurcated portions forming legs, the legs of said lever extending between the legs of said pusher post, and further including a pin joining the legs of said pusher post and operatively engaging the legs of said lever;
• and
• stop means mounted in said first casing for limiting the stress on said linkage means in the event of an excess pressure condition in said first casing, said stop means comprising a pair of stop ears on said pusher post and a retainer supporting said lever for pivotal movement and having stops blocking the travel path of said stop ears for positively restraining travel of said pusher post beyond a predetermined point.