L Type Instrument DBB Valve
L Type Instrument DBB Valve

L Type Instrument DBB Valve

Machined from the forged bar, our “L” Type Double Block and Bleed Valves feature two inline ball pattern primary and secondary isolating valves and a ball valve vent. Our Double Block and Bleed Valves are the superior market leader with a range of different operating temperatures and configurations.The Double Block and Bleed valves provide Soft seating, with 10mm, 14mm, or 20mm bore isolation valves for many applications without having to resort to traditional single isolate ball valves.

Oliver Valves’ standard “L” Type DBB range from ¼” up to 1”. L Type Instrument DBB Valves are available in Stainless Steel, Carbon Steel, Duplex, Super Duplex and many other materials on request. With various other connection types and sizes are available, such as Hub, Threaded, Welded. They have a Standard Temperature range of up to 120 Deg C to 200 Deg C– Soft Seated. All NPT connection threads are Single Point CNC machined.

All Oliver products have material traceability and pressure test certificates to BS EN 10204 3.1. A unique code is stamped on all valve bodies linking them to their material and chemical analysis certificates.

 

A smaller unit versus the traditional hook-up brings both piping and instrumentation isolation into one unit. This means less weight, which is significant on the top side of a platform when you combine all the pressure instrument take-offs. Typical installation 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. This is generally overcome by adding more stanchions to support traditional installation, which adds even more weight.

Cost reduction can typically be a 30% saving over traditional installation, which jumps up to 70% in valves made from exotic materials for more exacting processes! Cost-saving onsite compared to the cost of one factory tested component, as opposed to different piping valves, instrument valves, flanges, connections and flanged seal rings. 

The cost of then raising purchase orders and ensuring to chase the parts in goods receivable, etc., plus the shipping costs are higher and weightier; specs must all be taken into account, rise in cost can be 30% of the overall cost.

L Type Instrument DBB Valve Specifications:
Bore 10mm/14mm/20mm
Connection Size From ½” to 1.”
Firesafe Standards BS6755 Pt2, API 607, API 6FA, ISO 10497
Handle Lever and ‘T’ Bar
Packing PTFE or Graphite
Psi Ratings From 6,000PSI to 10,000PSI
Seats Soft (PCTFE/PEEK)
Temperature Up to 240 Deg C (soft seat)

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