CONTROL RELIABLE PNEUMATIC ENERGY ISOLATION VALVE WITH SOFT START FUNCTION
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United States of America Patent
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app pub date -
Mar 13, 2014
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
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Abstract
A valve assembly includes a valve including an inlet and an outlet, and a soft start valve in a normally closed position and located upstream of the valve. The soft start valve opens when a percentage of an outlet pressure at the outlet of the valve to an inlet pressure of the inlet of the valve reaches a predetermined percentage to allow fluid to flow through the soft start valve to the valve.
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