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GB635891A
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Improvements in and relating to metallic coating of metal articles such as valves and valve seats
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GB601158A
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Improvements relating to plug valves
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GB579008A
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Improvements in and relating to valves
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US2398444A
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Plug valve closure
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US2381447A
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Fluid pressure operated valve
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GB554976A
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Improvement in and relating to pressure balanced plug valve
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US2286689A
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Lubricated valve
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GB550835A
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Improvements in and relating to plug valves and method of finishing same
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US2302370A
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Fluid operated check valve
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US2280925A
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High temperature valve
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US2319943A
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Pressure balanced plug valve
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US2307443A
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Valve
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US2204440A
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Valve
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US2272313A
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Automatic sampler
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US2282493A
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Lubricated valve
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US2268723A
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Method of lapping valve plugs
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US2255182A
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High temperature valve
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US2233220A
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Lubricated plug valve
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US2208394A
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Nongalling plug valve
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US2206370A
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Low temperature alloy and valve or the like
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