Monoflange SBB Double Block & Bleed Valve – Flange x Thread – Ball Isolation 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

Monoflange SBB Double Block & Bleed Valve – Flange x Thread – Ball Isolation 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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6 - 8 Weeks

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Monoflange Single Body Double Block and Bleed Valve provides dual isolation and venting in a single flange connection for oil and gas instrument and gauge applications.

Executive Summary

Monoflange Single Body Double Block and Bleed Valve provides dual isolation and safe venting in a single compact flange-to-thread connection. It is used in oil and gas and process systems for instrument isolation, gauge protection, chemical injection, and safe venting between the two isolation points.

The valve features ball isolation for reliable shut-off and a needle drain for controlled cavity venting. Its monoflange design reduces weight, footprint, and potential leak paths compared to traditional multi-valve assemblies.

Manufactured to ASME B16.34, API 6D, and ISO 17292 standards, this valve is suitable for Class 150 to 2500 service and sizes from 1/2” to 2”, ensuring robust performance in high-pressure 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 Ball Isolation with Needle Drain
Materials Available Stainless Steel, Duplex, Hastelloy, Inconel
NACE Compliance NACE MR-0-175 materials available on request
Testing Low Emission Standards
Ball Options Floating Ball
Vent Valve Options Needle

Features and Benefits

  • Monoflange single body design.
  • Needle drain for controlled cavity venting.
  • Enables safe venting between isolation points.
  • Simplifies installation and maintenance.
  • Can be used in high-pressure and corrosive environments.

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Detailed Description

The Monoflange Single Body Double Block and Bleed Valve combines two isolation points and a vent in a single compact body, providing safe and reliable isolation in oil and gas and process systems. It features a ball isolation mechanism for leak-proof shut-off and a needle drain to safely vent the cavity between the isolation points. This design is particularly suitable for instrument or gauge isolation, chemical injection, sampling, and piping interface applications, where compact size and reduced leak paths are critical.

It's monoflange construction reduces weight, footprint, and the number of potential leak points compared to traditional multi-valve assemblies. The valve accommodates sizes from 1/2” to 2” and pressure classes from 150 to 2500, with both reduced and full bore options to suit different process requirements.

Manufactured from high-quality materials including SS 316, SS 316L, Duplex, Super Duplex, Hastelloy, Inconel, and Monel, the valve can be supplied with NACE-compliant materials for corrosive environments. All units are designed, tested, and certified in accordance with EEMUA 182, API 6D, ISO 17292, and ASME B16.34 standards and are factory tested to ensure reliable dual isolation and controlled cavity venting.

Engineering Data