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CA2144753A1
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Valve with safety lock plate
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US5546973A
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Threaded valve with safety joint
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US5368066A
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Valve with safety lock plate
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US5323805A
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Valve with safety lock-out
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US3741523A
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Seat for ball valve
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US3696695A
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Method and apparatus for finishing spherical surfaces
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US3675420A
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Valve actuator
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US3647178A
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High-pressure low-torque valve assembly
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US3647179A
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Split body valve assembly
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US3667725A
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Unstressed seats for between flange valves
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US3455534A
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Valve and two-piece seat assembly
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US3462118A
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Ball valve for use between flanges
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US3460803A
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High temperature and pressure valve seat
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US3401916A
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Dual ring valve seat
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US3408038A
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Flexible valve seat
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US3411746A
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Welded ball valve construction
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US3486736A
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Snap-in ball valve seals
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US3405910A
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Valves having differential area seals therein
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US3446475A
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Ball valves with retained seals
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US3401913A
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Between flange valve structure
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