Monoflange DBB Needle Valves

Double isolation and bleed in a single compact assembly, engineered for maximum process safety on flanged connections

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What Are Monoflange DBB Valves?

Indra Monoflange DBB valves are engineered to ensure maximum process isolation and safety by integrating double isolation and bleed functions into a single compact assembly. Available in Flange/Flange and Flange/Threaded configurations, these monoflange valves can be supplied in standard or fully customized designs, engineered by Indra’s technical team to satisfy the most demanding customer specifications and critical service conditions.

All Monoflange DBB valves can be equipped with a safety locking provision, supporting both padlockable handles and locking pins to prevent unauthorized or accidental operation. Connection options, flange faces, and outlet configurations follow the same flexibility as the SBB/SB range, with the addition of double isolation capability for services requiring maximum integrity.

✓Double isolation and bleed in one forged body, maximum process safety, minimal footprint

Technical Specifications

Pressure Rating

ASME 150 | ASME 300 | ASME 600 | ASME 900 | ASME 1500 | ASME 2500 | API 10000 | API 15000

Design

DBB (Double Block & Bleed)

API Size Ranges

Up to 1" 13/16

Flange Face

Raised Face (RF) | Ring Joint (RTJ)

Connection In

1/2" | 3/4" | 1" | 1½" | 2"

Connection Out

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

Vent

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

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 body, providing maximum process safety for critical service conditions.

Fully Customizable

Available in standard or fully customized designs, engineered by Indra's technical team to satisfy the most demanding specifications and critical service conditions.

Safety Locking

All Monoflange DBB valves can be equipped with padlockable handles and locking pins to prevent unauthorized or accidental operation.

Low Temperature & Cryogenic Versions

Engineered with specific design features and materials to withstand extreme conditions and ensure safe and efficient operation in cryogenic service.

Configuration Options

Distribution Monoflange DBB Needle Valves can be customized to meet your specific requirements:

Design

• DBB (Double Block & Bleed)

End Connections

• Flange/Flange (FLxFL)
• Flange/Threaded (FLxF)

Special Features

• Raised Face (RF)
• Ring Joint (RTJ)

Where Monoflange DBB Needle Valves Excel

Distribution Monoflange DBB Needle Valves are the ideal choice for:

Critical process isolation requiring double block and bleed capability on flanged instrument connectionsconnections, replacing multi-valve assemblies with a single compact body

High-integrity services in Oil & Gas, LNG, and Hydrogen where a single isolation valve is insufficient by procedure or regulationinstallation would exceed available footprint or weight limits

Space-constrained installations where a separate DBB valve assembly would exceed available footprint or weight limits

Low temperature and cryogenic service, engineered versions available for LNG, LIN, LOX, and similar extreme-condition applications

Need single isolation?

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

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