Block and Bleed Valves
Operational safety and precise control
Certified valves that ensure reliable isolation, controlled venting and maximum leak tightness in industrial instrumentation systems.
Block and Bleed Valves (SB, DB, BB and DBB) are essential in industrial instrumentation systems, especially in sectors such as Oil & Gas, petrochemicals, chemicals and power generation. They ensure safe isolation and controlled venting, and reduce leak points. These valves combine isolation and bleed functions in a single body, replacing traditional combinations of several valves. This allows a more compact installation, reduces system weight and optimises space. They also make maintenance easier, even in high pressure applications or with aggressive fluids. At Lexier, we help you select the most suitable isolation valve for your process, ensuring efficiency, operational safety and reliability. Our offer includes: single block valves (SB), block and bleed valves (BB), double block valves (DB), double block and bleed valves (DBB) and medium pressure versions for critical applications up to 1379 bar. Our range ensures safe isolation, effective venting and reliable maintenance, meeting international standards and current regulations.
Technical Features
Sizes
Up to 1"
Pressure
- Up to 20,000 psig (1,379 bar) in needle valves (15BN/20BN)
Materials
- 316 stainless steel (standard for medium pressure series)
- A105 carbon steel (on certain models)
- Other alloys available on request (Duplex, Super Duplex, Inconel, Alloy 625, etc.)
Certificates
- Factory testing according to API 598
Options:
- Fire Safe (API 607)
- Anti-static design (EN 12266-2)
- NACE MR0175 compliance for H₂S environments
Benefits
- Significant leak reduction: Fewer joints and connections than traditional multi-valve configurations.
- Space and weight savings: Compact designs that simplify mounting on instrumentation, skids and control panels.
- Lower installation and maintenance costs: Fewer components, less complexity and shorter assembly time.
- Safe isolation and venting: They allow the line to be isolated and downstream pressure to be vented to replace pressure gauges, analysers or sensors without stopping the process.
- Guaranteed leak testing: Every valve is tested according to API 598 to ensure reliable performance.
- Options for critical service: Available with fire-safe (API 607) and anti-static (EN 12266-2) designs and NACE MR0175 compliance for corrosive applications.
- Configuration versatility: Wide range of single block, double block, needle or ball valve versions, medium pressures and multiple geometries to suit any installation.
- Longer service life: High strength materials, non-rotating stem (on needle valves), metal or PEEK seats and stainless steel bodies to withstand high pressures and temperatures.
- Reliable operation over repeated cycles: The robust design of stem, seats and packing reduces wear and maintains the seal over the long term.
Our range of Block and Bleed Valves
Additional Instrumentation
Applications for our range of Block and Bleed Valves
Our Partners
Our alliances with world-leading valve and component manufacturers enable us to offer our customers the highest quality, reliable and durable products.
How can we support your project?
If you have any questions, please fill out the form below and we will contact you.
We reply within 24 working hours.
Phone: +34 931 71 31 01 · Email: lexier@lexier.es