Structural Features

The double block and bleed plug valves have commonly been used for primary and secondary tight shut off, in an attempt to provide and ensure system integrity. Previously, the system integrity needed two individual isolation valves, a spool piece and a bleed valve that not only caused extensive costs and weight but also were increasing the risk of emissions due to multiple flanged faces.

These DBB plug valves have a single body with dual Plug valves with a bleed valve installed between the two main line valves and are available bi-directional with metal seat or rubber seat, both in ANSI Class VI.

They replace existing traditional techniques employed by pipeline engineers to generate a double block and bleed configuration in the pipeline.

Note: the size of serial valve connecting flange can be designed according to customers’ requirement.