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Radial-directed fluid-pressure-loaded all-metal-sealed gate valv

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Reciprocating expandable gate valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Retractable-gasket valve having two stiffnesses

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Retracting ring seal valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotary barrel gate valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Reexamination Certificate

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Rotary disk valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotary flow control apparatus

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotary plug valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotary valve

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotary valve with pressure urged sealing member

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Rotor valve and seal

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Reexamination Certificate

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