Monoflange SBB Double Block & Bleed Valve – Flange x Thread – OS&Y 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 – OS&Y 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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Delivery Time:

6 - 8 Weeks

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Monoflange SBB Double Block and Bleed Valve – Flange x Thread with OS&Y isolation and needle drain provides dual isolation with visual valve position indication and safe venting.

Executive Summary

The Monoflange SBB Double Block and Bleed Valve – Flange x Thread with OS&Y isolation and needle drain is a compact valve designed for oil and gas systems requiring dual isolation and safe venting. It is used for instrument and gauge isolation, chemical injection, and sampling, providing reliable pressure control and safety.

The OS&Y design allows clear visual indication of valve position, and the integrated needle drain safely vents pressure between the isolation points.

This configuration reduces potential leak paths, supports safe and precise operation, and simplifies maintenance in critical piping systems.

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

  • Flange x Thread connections for versatile installation.
  • Simplifies installation and saves space.
  • Provides reliable dual isolation in a compact assembly.
  • Reduces number of joints and potential leak paths.
  • Offers flexibility in material selection for corrosive or high-pressure environments.

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Detailed Description

The Monoflange SBB Double Block and Bleed Valve with Flange x Thread connections features an OS&Y isolation valve and a needle drain, providing dual isolation in a single compact assembly. It is designed for oil and gas applications where safe venting of trapped pressure between isolation points is required, such as instrument or gauge isolation, chemical injection, and sampling lines.

The valve’s monoflange design integrates both isolation and venting functions in one unit, reducing the number of joints and potential leak paths while saving space and simplifying installation. The OS&Y isolation valve offers clear visual indication of open or closed status, allowing operators to quickly verify valve position. The needle drain provides controlled venting of pressure trapped between the isolation points, ensuring safe operation during maintenance or sampling procedures.

The valve is suitable for flange sizes from 1/2” to 2” and pressure classes from 150 to 2500, with options for reduced or full bore depending on process requirements. It is available in a variety of materials including stainless steel 316, 316L, duplex, super duplex, Hastelloy, Inconel, and Monel, and can be manufactured to meet NACE MR-0175 standards. The design complies with recognized standards such as ASME B16.34, API 6D, and ISO 17292, and is tested to low emission requirements.

This configuration is ideal for oil and gas operations requiring reliable dual isolation, precise venting, and compact installation in critical piping systems.

Engineering Data