Double Block & Bleed Valve – Flange x Flange – Ball x Ball with Needle Drain – 1/2” to 2” – Class 150 to 2500 – ASME B16.34 / API 6D / ISO 17292

Block and Bleed Valve

Also known as:

DBB, Double Block and Bleed Valve

Double Block & Bleed Valve – Flange x Flange – Ball x Ball with Needle Drain – 1/2” to 2” – Class 150 to 2500 – ASME B16.34 / API 6D / ISO 17292

Block and Bleed Valve

Also known as:

DBB, Double Block and Bleed Valve

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Delivery Time:

6 - 8 Weeks

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The Double Block & Bleed Valve provides dual isolation and safe venting for downstream protection in industrial and oil and gas systems.

Executive Summary

This Double Block & Bleed Valve – Flange x Flange – Ball x Ball with Needle Drain is designed for high-integrity isolation in oil and gas operations. It is available in sizes 1/2” to 2” and pressure classes 150 to 2500.

Built to ASME B16.34, API 6D, and ISO 17292 standards, the valve provides secure double isolation with a bleed function for safe maintenance, leak testing, and pressure relief. Its compact design reduces leak paths, improves safety, and ensures reliable performance across upstream, midstream, and downstream applications.

Technical Specifications

Flange Size Range 1/2” to 2”
Pressure Rating Class 150 to Class 2500
Bore Options Reduced Bore, Full Bore
Standards Compliance EEMUA 182, API 6D, ISO 17292, ASME B16.34
Configurations Needle-Needle-Needle, Ball-Needle-Ball
Materials Available Stainless Steel, Duplex, Hastelloy, Inconel
NACE Compliance NACE MR-0-175 materials available on request
Testing Low Emission Standards
Ball Options Trunnion Ball, Floating Ball
Vent Valve Options Needle, Ball, Globe OS&Y

Features and Benefits

  • Needle valve for bleed/drain function.
  • Compact flange design minimizes space requirements.
  • Low operating torque allows smooth actuation.
  • Flange x Flange end connections compatible with standard piping.
  • Allows quicker installation and easier maintenance.

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Detailed Description

The Double Block & Bleed Valve – Flange x Flange – Ball x Ball with Needle Drain is a high-performance isolation and venting solution designed specifically for oil and gas applications. This valve combines two independent ball isolation valves and a centrally located needle drain valve within a single, compact body, ensuring reliable double isolation and safe pressure relief or venting.

Manufactured in compliance with ASME B16.34, API 6D, and ISO 17292 standards, it offers assurance of global quality and safety benchmarks. The design accommodates line sizes ranging from ½” to 2”, with pressure ratings from Class 150 up to Class 2500, making it suitable for both standard and high-pressure operations.

The flange x flange connections provide secure installation and easy integration into piping systems, while the ball x ball configuration guarantees tight shut-off. The needle drain allows for controlled venting, sampling, or pressure equalization, enhancing operational safety and efficiency.

The valve is well-suited for critical applications such as pipeline isolation, meter calibration, instrumentation, and maintenance operations in oil and gas facilities. Its compact, space-saving design reduces potential leak paths compared to conventional multi-valve assemblies, lowering installation costs and improving reliability.

Engineering Data