Double Isolation & Bleed

Double Isolation and Bleed (DIB) is defined as “a single valve with two seating surfaces, each of which, in the closed position, provides a seal against pressure from a single source, with a means of venting/bleeding the cavity between the seating surfaces.” The Chromatic DOV is designed to provide two mechanical wedge seals to perform the DIB function. The body cavity of the DOV is equipped with a relief system that will allow body pressure to relieve and equalize with the upstream side of the valve. Other options are available for the DOV relief system to include pressure gauges or leak off tubes for draining the body.


  • Provides a seal against pressure from a single source
  • Two mechanical wedge seals
  • Additional options for gauges and leak off tubes

Comes Standard with the following Products:

DOV Valve

The DOV valve (Double Offset Valve) extends the technology from the HCV ...

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