DBB Valves
FLOWKS Double Block & Bleed (DBB) valves provide dual isolation with bleed verification in a single compact body. Replacing traditional multi-valve installations, FLOWKS DBB valves reduce weight, space and potential leak paths. Available in bolted bonnet, all-welded and expanding gate designs per API 6D and API 607.
Specifications
| Design Standard | API 6D, API 607, API 608, ASME B16.34, ISO 15848 |
| Size Range | 2" - 24" |
| Pressure Class | Class 150 - 1500 |
| Material | Carbon Steel (A216 WCB), Stainless Steel (A351 CF8M), Duplex (A890 4A), Alloy (Inconel 625, Monel 400) |
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Product Range
Full Bore DBB Valve
Full bore passage with double block and bleed capability. Flanged or butt-weld ends. Reduces pipeline inventory and maintenance cost.
Reduced Bore DBB Valve
Compact reduced bore design for space-critical installations. Provides double isolation and bleed verification in a single valve body.
Flange End DBB Valve
Flanged connection DBB valve for easy installation and maintenance. Bolted bonnet design with metal-to-metal seats for fire-safe service.
All-Welded DBB Valve
All-welded body DBB valve with extended bonnet for buried pipeline service. Zero external leakage design per ISO 15848.