Due to age and corrosion, the main gas shut-off valve in up to 10% of California homes is frozen so tight that the average homeowner cannot move it to the closed position, according to a Public ...

Pacific Gas and Electric employees tried to stop the flow of natural gas into the pipeline but they couldn’t reach the manual valve. The gas wasn't shut off for 90 minutes. San Bruno Assemblyman Jerry ...

Design and development of an electrohydraulically actuated gas sampling valve is presented for use in auto engine combustion studies. The valve was developed with particular emphasis on sampling ...