Hemiwedge can provide a valve that meets the pipeline description of Double Block and Bleed and meet testing requirements established by API 6D for both Double Block and Bleed and Double Isolation Block. By converting the stationary core into an extended upstream seat, we are able to provide two independent seats/seals that can provide a verifiable bubble-tight/provable seal repeatedly.

This design configuration was developed for a customer in requesting a Double Block and Bleed valve for the specialty gas industry. Their final testing requirements included subjecting the valve to API 6D DBB parameters, after 200 cycles, with Helium. The valve held bubble-tight.

Contact us to discuss your demanding valve requirements.