The Ashton Valve Company

Henry Ashton, inventor of the locked “pop” safety valve, founded Ashton’s Lock Safety Valve Co. in 1871 in Boston, Massachusetts.

Ashton lock valve patent, 1871

The Ashton Valve Company’s steam valves and gauges were very successful in the marketplace and won many medals at international expositions and world’s fairs. The company absorbed the Boston Steam Gage Company in 18982, and was active in Boston and Cambridge through the first half of the twentieth century, with business peaking in the 1920s and 1930s. It merged with the Crosby Steam and Gage Company in 1948.


Ashton Valve & Gauge Ad, 1913

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