Block & Bleed Valves
Produced by BMT Superlok · Revision R2
Selection guide
Compact double block and bleed and monoflange valve assemblies that combine primary isolation, secondary isolation and bleed/vent functions in one process valve unit.
Technical selection snapshot
Block & Bleed Valves · Revision R2
- Function
- Compact primary isolation, secondary isolation and bleed/vent function in one process valve assembly.
- Series / type
- Double Block & Bleed / Monoflange
- Best used for
- Process and instrument connections where compact hook-up assemblies reduce part count compared with conventional multi-valve installations.
- Typical system location
- Pressure tapping points, transmitter/gauge connections, process isolation points and compact hook-up assemblies.
- Pressure / class
- Catalog includes pressure ratings up to 10,000 psig / 690 bar for listed configurations and flange classes up to CL2500 depending on design.
- Temperature range
- Refer to catalog by material, seat and packing configuration.
Selection note. Use DBB/monoflange assemblies to reduce separate components and connection points compared with conventional multi-valve hook-ups. Do not assume guaranteed leak elimination — verify against system conditions.
Key points
- Double block and bleed configurations
- Monoflange configurations
- Ball and needle valve combinations
- Flanged-threaded and flanged-flanged versions
- Fire-safe design references
- One compact unit reduces separate valve/fitting count
- Materials include stainless steel, carbon steel and duplex options depending on configuration
Reference
Applications & selection guide
Where it sits in the system
- Pressure instrument root connections
- Gauge and transmitter isolation
- Process tapping points
- Compact isolation and bleed assemblies
- Flanged process hook-ups
Typical systems & markets
- Oil & Gas
- Petrochemical and refining
- Offshore and marine
- Process measurement systems
- Energy systems
Selection reason
- Combines block and bleed functions in one unit
- Reduces separate components compared with conventional installations
- Supports compact hook-up layouts
- Monoflange option for space and weight reduction
- Catalog includes DBB and monoflange dimensional data
Need help selecting the right configuration?