With the DBB valve, the smaller unit versus the traditional hook-up brings the piping and instrumentation isolation into one unit. This means there is less weight, which is a significant benefit on the top side of the platform when you combine the pressure from the instrument take-offs. With a typical installation, the weight is reduced from 33kg to 7kg, a weight reduction of 75%. Weight reduction is also an issue when take-off is horizontal; this instils a bending moment and could cause critical fracture of the pipeline-interface. Generally, this is overcome by adding more stanchions to support traditional installation, which adds even more weight.

The Cost reduction benefit of DBB valves is typically a 30% saving over traditional installation. This jumps up to 70% in the case of valves made from exotic materials for more exacting processes! The cost of one factory tested component, as opposed to different piping valves, instrument valves, flanges, connections and flanged seal rings, is much lower.  Then there’s the cost to raise purchase orders and expediting department to chase the parts in goods receivable, etc., as well as the shipping costs which are larger and weightier; specs must all be taken into account, rise in cost can be 30% of the overall cost.