4. Valves and valve actuation
  5. With friction detent

A. Y. McDonald Mfg. Co.

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Angled dual check valve

Fluid handling – Removable valve head and seat unit – Retained by bonnet or closure
Reexamination Certificate

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Auxiliary gas connection for meter sets

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent

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Ball valve construction

Valves and valve actuation – Limit stop – Rotary valve
Patent

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Meter bar and metering system

Fluid handling – Systems – Flow path with serial valves and/or closures
Reexamination Certificate

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Meter bar and metering system

Fluid handling – Systems – Flow path with serial valves and/or closures
Reexamination Certificate

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