J B Valves

Process Interface

Double Block & Bleed Valves.


Subsea process interface Double Block & Bleed Valves have been developed to allow for seamless integration between the piping system and instrumentation.  Within this range hybrid fire safe designs have been developed to allow for severe service applications.  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. From 1/2” to 3”, ASME Cl 150 to Cl2500, API 3K to 10K,

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. 


  • Full Bore ports, up to 13mm (10mm Standard).

  • JIC, NPT, BSP & Medium Pressure Ports available as standard (other connection types available upon request).

  • 3000m (10,000 ft) water depth.

  • Up to 1375 Bar (20,000) psi working pressure (dependant  on port type).

  • Proof Tested at 1.5 x Design Pressure (1.65 x Working Pressure) allows system testing including pressure relief valves.

  • Non wetted threads on both bonnet and stem eliminate crevice corrosion and contamination.

  • Cartridge style head unit allows quick change out, reducing maintenance down time.

  • Multiple ingress seals on stem and body-bonnet joint provide extra protection against water ingress.

  • Symmetrical non-rotating tip design, ensures primary   sealing and back seat feature are equally effective.

  • Glandless bonnet utilising pressure energised, multi  element chevron stem seals, eliminates the requirement for routine adjustment.

  • Nitronic stem as standard, increases resistance to wear and galling, resulting in superior cycling endurance.

  • Available in single Block & Bleed & Double Block & Bleed Variants.

  • Colour coded, powder coated, stainless steel handles in Conventional X, Y & T bar styles, provide clear visual identification for diver operation.

  • ROV paddle operator available.

  • Threaded mounting holes as standard, provide multiple options for mounting.


Subsea Process Interface Valves
Pressure Ranges ASME Class 150 - 2500
API 3K, 5K & 10K
Size Range 1/2” to 3”
Valve Configurations Single Isolation
Single Block & Bleed
Double Block & Bleed
Valve Types Available Subsea Glandless Needle Valve, Hybrid Firesafe Design
Temperature Ratings -45 °C to 180 °C
Flange Types RF (Raised Face)
RTJ, (Ring Type Joint) API Flanges to be specified by purchaser
Connections JIC, SAE, NPT, BSP & Medium Pressure (other connection types available upon request)
Bore Size 10mm (13mm Option)

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.