Monoblock DBB & DB Needle Valves

Double isolation and bleed in a single compact assembly, engineered for critical and high-pressure applications requiring maximum process safety

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What Are Monoblock DBB & DB Valves?

Indra Monoblock DBB and DB valves are engineered to ensure maximum process isolation and safety by integrating double isolation and bleed functions within a single compact assembly. Designed for critical and high-pressure applications, they provide superior reliability while minimizing system size, weight, and potential leak points.

The one-piece forged body provides superior strength and durability rated up to 15,000 PSI, eliminating the complexity of traditional multi-valve assemblies and “Christmas tree” configurations. The same exceptional connection flexibility as the SBB/SB series is available, threaded, flanged, butt-weld, socket-weld, and hub options including mixed inlet/outlet combinations.

✓Double isolation and bleed in one forged body, maximum safety, minimum footprint, up to 15,000 PSI

Technical Specifications

Pressure Rating

ASME 150 | ASME 300 | ASME 600 | ASME 900 | ASME 1500 | ASME 2500 | 6,000 PSI | 10,000 PSI | 15,000 PSI (optional) | API 10000 | API 15000 | Pipe Rating (BW/SW ends)

Design

DB | DBB

Connection In

1/4" (NPT or Welded) | 1/2" (NPT or Welded) | 3/4" (NPT or Welded) | 1" (NPT or Welded) | 1/2"–2" Flanged

Connection Out

1/4" (NPT or Welded) | 1/2" (NPT or Welded) | 3/4" (NPT or Welded) | 1" (NPT or Welded) | 1/2"–2" Flanged | Integral for tubing connection

Vent

1/4" NPT-F (optional) | 1/2" NPT-F | Integral for tubing connection

Flange Face

Raised Face (RF) | Ring Joint (RTJ)

Materials

C.S. A105 | C.S. A350 LF2 | SS 316/316L Dual Grade | Duplex F51 | Superduplex F53 | Superduplex F55 | Inconel 625 | Incoloy 825 | Monel 400 | Hastelloy C276 | Titanium | On demand, NACE-compliant versions available upon request

Seal

PTFE | Graphite | On demand

Key Features

Double Isolation and Bleed

Two independent isolation valves plus bleed function integrated in a single compact forged body, providing maximum process safety for critical service conditions.

One-Piece Forged Body

Superior strength and durability rated up to 15,000 PSI, eliminating internal weld points and ensuring pressure boundary integrity under extreme conditions.

Minimized System Size and Weight

Significantly reduces system size, weight, and potential leak points compared to equivalent separate valve assemblies for double block and bleed service.

Hub Connection

Compact, clamp-style mechanical interface designed for high-pressure and subsea service, providing significant weight reduction and superior vibration resistance.

Configuration Options

Distribution Monoblock SBB & SB can be customized to meet your specific requirements:

Design

• DB (Double Block)
• DBB (Double Block & Bleed)

End Connections

• Threaded (FxF, MxF)
• Butt Weld (BWxF, BWxBW)
• Socket Weld (SWxF, SWxSW)
• Flanged (FLxF, FLxFL)
• Hub

Special Features

• Extended bonnet for high temperature service (Monoblock DBB Monoflange with Extended Bonnet)
• OS&Y operators (Monoblock DBB High Pressure BW x NPT)
• Integral compression fitting for tubing connection (Monoblock DBB Dual Flange with Extended Bonnet)
• Padlock / locking device

Where Monoblock DBB & DB Needle Valves Excel

Distribution Monoblock DBB & DB Needle Valves are the ideal choice for:

Critical process isolation requiring double block and bleed capability, Oil & Gas upstream and midstream services where single isolation is insufficient by procedure or regulation

High-pressure applications up to 15,000 PSI where a compact DBB assembly replaces a multi-valve “Christmas tree” configuration

Subsea and offshore service, hub connection option provides weight reduction and vibration resistance for demanding installation environments

LNG & Cryogenic and Hydrogen service, engineered versions available, designed for reliable operation under extreme temperature and pressure conditions

Need single isolation?

Explore our Monoblock SBB & SB valves for a more compact solution where double block is not required.

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