Floating Ball Valve DBB - Flanged 2/3 Piece Design

Our Flanged Style Double Block & Bleed Valves are available in both two and three piece body designs and contain three valves in one single unit - thus reducing weight and saving space across the installation. The two piece design is available in Oliver standard lengths up to ASME Class 300 and in accordance with ASME B16.10 lengths for ASME Class 600 and above. For the three piece design, all valves are the shortest overall length.

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Available up to 3" full bore and 4" reduced bore
Floating Ball design with robust lever operation
Flanged connections in accordance with ASME B16.5 or API 6A, hub connectors or welded ends also available.
Integral vent valve with threaded outlet connection.

Various other bleed valve options are available and we can work with our customers to adopt a technical project focused approach to ensure complete compatibility.

2/3 Piece Bolted Construction

The 2 and 3 piece bolted construction provides conventional through bolting of the flanged end connections, plus the option of hub or welded ends. The overall lengths of the valve are kept to a minimum and offer considerable cost, weight and space savings over conventional piping methods of double block and bleed, using separate ball valves and spool pieces.

AMSE B16.10 overall length (ASME Class 600 and above) – 2 piece body

Allows the replacement of single isolate ball valves with the increased safety of true double isolation, without the need for expensive pipework modifications.

Full Through Bore

Valves are available with full bore sizes in accordance with API 6D, ensuring maximum flow for increased production rates and allowing pigging of the pipe line.

Floating Ball Design

The floating ball construction ensures maximum weight and space savings, whilst providing reliable and safe isolation up to and including ASME Class 2500

Floating DBB Valve Specifications:
Pressure Rating ASME Class 150 to 2500, API 6A up to 5,000 API
Temperature Range -50 deg c to 240 deg C
Design Standards ASME B16.34, API 6D, ASME VIII, ASME B16.5
Firesafe Standards API 607, API6FA, ISO 10497
Seat Materials Soft Seats: PEEK, PTFE & Metal Seats: Tungsten Carbide and Chrome Carbide
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