Double Block & Bleed

Double Block and Bleed is available on any size and pressure class.  A simple change to the core, adding a seal on both ends, will isolate the body cavity.  The body can then be vented and checked for pressure buildup verifying the double block.  In the event that a valve has trapped body pressure the self-relieving feature will equalize with the upstream side of the valve.  An important differentiation between the Chromatic DBB and a standard ball valve is how it relieves this pressure.  The standard double block and bleed valve is designed with self-relieving seats to the downstream side.  If a standard ball valve has a leaking upstream seat then upstream pressure can continually pass downstream.  The HCV maintains its Reliable Mechanical Wedge Seal on the downstream side providing a more effective seat.

Available in the following Products:

HCV Valve

The HCV valve (HEMI cartridge valve) is an innovative design that incorp...

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EBV Valve

The EBV valve (Extended Body Valve) is a simple and innovative extension...

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