J B Valves

Couplers, Check & Vent.

Couplers, Check & Uni Directional Vent Valves.


Our range of couplers, subsea check valves and uni-directional vent valves are developed with peace of mind at their core.  Subsea couplers, check valves, & uni-directional vent valves utilise metal to metal & soft sealing technologies. 

uni-directional vent valves can be used in applications to prevent pressure lock whilst mating umbilicals & venting of actuators and many others. 5psi Cracking pressure, up To 20,000 psi CWP, and down To 3000 meters water depth.

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 Coupler, Check & Vent
Pressure Ranges ASME Class 150 - 2500
API 3K, 5K & 10K,
20,000psi (1375 Bar)
Size Range 1/4” & 1/2”
Vent Valve Options Screwed, Bolted & OS&Y
Temperature Ratings -40 °C to 235 °C
Connection JIC, SAE, NPT, BSP & Medium Pressure
(other connection types available upon request)
Flanged options available on Check and Vent Valves

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.