Since its inception in 1949, Solon Manufacturing has engineered products for industry worldwide. Sound engineering resulting in practical answers is the basis upon which Solon designs and manufactures all of its products.This philosophy has been evident since the beginning of Solon Relief Valves that incorporate Solon engineered Belleville Springs. Solon Relief Valves were used most notably on John Glenn's spacesuit on his historic orbit of the earth in 1962.