Valves and valve actuation – With correlated flow path – Pipe side
Reexamination Certificate
2006-01-23
2008-12-02
Bastianelli, John (Department: 3753)
Valves and valve actuation
With correlated flow path
Pipe side
C251S216000, C251S332000, C251S900000
Reexamination Certificate
active
07458558
ABSTRACT:
Method and apparatus10for releasing pressure that may have built up behind a plug18in a controlled manner. Environmental and safety regulations mandate that all bleeder valves in a gas and liquid hydrocarbon and chemical service require metal plugs18to be installed downstream of the valve to ensure a positive shut off. Removal of these plugs18can create a hazardous condition if there is not a good seat on the bleeder valve. Pressure can build up behind the plug18and as the bull plug is removed, an uncontrolled pressure release can occur. The apparatus10is a safety device, serving as a plug18and also providing a method for releasing the pressure that may have built up behind the plug in a controlled manner. The device10comprises a carbon steel plug18fabricated with a vent hole20for controlled pressure release and a carbon steel modified hex bolt22having a tapered seat26.
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Bastianelli John
Kroll Michael I
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