The Ashton Valve Company: Manufacturers of the Ashton Lock-up "pop" Safety Valves for Locomotive, Stationary, Marine and Portable Boilers, Ashton Water Relief Valves, Hydraulic Relief Valves, Cylinder Relief and Snifting Valves, Blow-off Valves, Steam Vehicle Fittings, Ashton Chime Whistles, Ashton Pressure and Vacuum Gages, Also, Revolution Counters, Engine Registers, Locomotive and Marine Clocks, Pressure Recording Gages, Gage Testers, Water Gages, Gage Cocks, Water Columns, Test Pumps, Thermometers, Pyrometers, and High Grade Engine and Boiler Steam Specialties in General
