Techniques are presented for a pilot operated check valve for charging and flowing gas for arc process equipment. A solenoid is used to divert process gas (e.g., the gas utilized during an arc process) into a flow of pilot gas that generates a cracking pressure to open the pilot operated check valve and allow the process gas to flow to a torch for an arc process. This arrangement achieves a high valve flow coefficient (Cv) value (e.g., a Cv value greater than 1), and thus, can decrease pressure drops across the valve.
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"Pilot Operated Check Valve for Charging and Flowing Gas for Arc Process Equipment", Technical Disclosure Commons, (April 14, 2021)