N Type Forged DBB

Machined from a single piece upset forging, our “N” Type Double Block and Bleed Valves feature two needle primary and secondary isolating valves and a needle valve. With a range of different operating temperatures and configurations, our Double Block and Bleed Valves are the superior market leader

Enquire Now

Oliver Valves Double Block and Bleed valves provide Metal seating, with 5.4mm bore for many applications without having to resort to traditional single isolate valves

Oliver Valves' standard “N” Type DBB range from 150lb up to 2500lb, but can also be rated to 10,000psi.

Available in Stainless Steel, Carbon Steel, Duplex, Super Duplex and many other materials on request.

Various other connection types and size are available – Flanged, Hub, Threaded, Welded.

Standard Temperature range up to 540 Deg C, depending on materials

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 vs the traditional hook-up, bringing 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 it 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 pipeline interface and is generally overcome by adding more stanchions to support traditional installation, which adds even more weight.

Cost reduction – typically 30% saving over traditional installation, which jumps up to 70% in the case of valves made from exotic materials for more exacting processes!

Cost saving on site – the cost of one factory tested component, as opposed to different piping valves, instrument valves, flanges, connections and flanged seal rings and then the cost to raise purchase orders and expediting department to chase the parts in goods receivable, etc., and then the shipping costs are larger and weightier, specs must all be taken into account, rises in cost can be 30% of the overall cost.

N Type Forged DBB Valve Specifications:
PSI Ratings From 150lb to 10,000PSI
Temperature Up to 540 Deg C
Packing PTFE or Graphite
Connection Size From ½” to 2”
Handle ‘T’ Bar
Seat Metal
Bore 5.4mm
Firesafe BS6755 Pt2, API 607, API 6FA, ISO 10497
 Return to the Forged DBB Valves page

Copyright 2021 © Oliver Valves Limited, Parkgate Industrial Estate, Cheshire WA16 8DX

Privacy Policy