Oliver D Type Double Block & Bleed Valve – Flanged, Forged Duplex Body
Rp123000.00
The D Type Double Block & Bleed (DBB) Valve by Oliver Valves is a compact, forged-body manifold featuring two in-line ball valves for primary and secondary isolation and a heavy-duty needle valve for venting. Engineered for critical service applications, this valve significantly reduces installation weight, space, and leak paths compared to conventional assemblies.
Designed for use in pressure instrument take-offs, sampling, chemical injection, and drain lines, the valve ensures reliable double isolation and venting while maintaining compliance with international safety and performance standards, including firesafe and NACE certifications.
Technical Specifications
Parameter | Specification |
Manufacturer | Oliver Valves |
Model | D Type Double Block & Bleed (DBB) |
Valve Configuration | 2 Ball Valves in-line + 1 Needle Valve (Vent) |
Body Design | One-piece drop forged body, grain flow controlled |
Body Material | ASTM A182 F51 (Duplex Stainless Steel) |
Flange Material | ASTM A182 F51 |
Size Range | DN15 to DN80 (1/2” to 3”) |
Pressure Class Range | Class 150 to 2500 |
Seat Material | PTFE |
Seal & Gland Packing | PTFE / Graphite |
Ball Valve Bore Options | 10mm (CV 6.3), 14mm (CV 11.7), 20mm (CV 27.9) |
Operation | Quarter-turn lever, half-turn for vent |
Vent Connection | 1/2” NPT Female |
Outlet Connection | Flanged or threaded (configurable) |
Certifications | Firesafe (API 607, API 6FA, BS 6755 Part 2), NACE MR-01-75 |
Safety Features | Blok-Lok anti-disassembly system, optional handle locking |
Applications | Pressure instrumentation, sampling, chemical injection, drain, compact hook-ups |
