J B Valves

Slimline Double Block & Bleed Valves.

Slimline DBB


Monoflange valve solutions for Single Isolation, Single Block & Bleed, and Double Block & Bleed configurations. Monoflange solutions offer the greatest cost, weight, and space saving with isolation and venting valves incorporated into the process interface with simplified installation. Monoflange valves are offered in Flange by Flange or Flange by Thread configurations.

Monoblock multi valve isolation assemblies are designed to reduce leak paths & improve operational safety factors. Monoblock solutions are designed to replace conventional multi valve constructions. Fatigue and strain from large assemblies is reduced significantly by using close coupled manifold systems.

Process Connections

JB Valves manufacture to client specifications. API, ASME, ANSI, DIN, & threaded connections can be manufactured to order.


316, Duplex, Super Duplex, Inconel 625, Incoloy 825, Monel, 6Mo, LF2, other materials available on request. 


Pressure Ranges ASME Class 150 - 2500
API 3K, 5K & 10K
Valve Configurations Single Isolation
Single Block & Bleed
Double Block & Bleed
Valve Types Available Screwed, Bolted & OS&Y
Temperature Ratings -54 ° C to 538 ° C (Graphite)
-40 °C to 235 °C (NON Graphite)
Flange Types RF (Raised Face)
RTJ, (Ring Type Joint) API Flanges to be specified by purchaser
Bore Size 5mm

Contact J B Valves

We can build powerful solutions, which are more advanced than ever. If you are interested working with our forward thinking & dynamic team call us on +44 1484 509 888.