Subsea Control Manifolds

J+S has developed and designed highly configurable Manifold assemblies for subsea use.

High specification components

The use of high specification components and materials enables the operation of the Manifolds in a variety of environments and functions. The Manifolds are suitable for installation within a pressure compensated oil-filled enclosure or open to the external environment up to depths of 3000m.

Port positions, connection type and component layouts are all configurable to enable installation in a variety of orientations to fit the available space. Supply and function lines can be installed with dual pressure transducers for added redundancy should this be required on any of our Manifold designs. The Manifolds can be fully ported or mount onto a base interface. Manifolds can be daisy chained to give increased functionality or to mount clusters of valves closest to their functions thus reducing multiple complex equipment tubing runs.

We can rapidly configure manifolds for a variety of uses.

Initially designed for use in our Subsea Control Module (SCM), the flexibility of designing using Solidworks 3D and Enterprise configuration management software, allows us to rapidly configure manifolds for a variety of uses. The individual Manifolds can be deployed Subsea as part of a range of equipment such as an SCM, intervention tooling package or Subsea Isolation Valve (SSIV) control assembly.

Bespoke designs can also be catered for.


J+S has designed a highly survivable Subsea enclosure.

Maintenance-free and secure

The Subsea Penetrator Manifold is suitable for use as a junction box, electrical termination/distribution module or secure housing for electrical components.

The Subsea Penetrator Manifold provides a maintenance-free and secure subsea enclosure utilising J+S’s extensive capability in high integrity vessel design and manufacture. The Subsea Penetrator Manifold can be used in numerous applications and has a wide range of interfacing options. These include subsea connectors or an over moulded stainless steel penetrator, providing a versatile interfacing solution for multiple subsea connection points.

Key Features

J+S has designed a manifold that mounts direct immersion subsea directional control valves, suitable for single acting actuator functions.

Hydraulic Latching
The SSIV Hydraulic Manifold valves are designed to hydraulically latch when a pulse signal is sent to move to the valve to the open position. The valve will remain latched until a close signal is received or the hydraulic pressure drops below a pre-set value. On close the function line is vented locally. Manifolds can be configured for single or multiple DCV’s. Function line pressure transducers are incorporated mounted directly to the DCV to provide indication of system status.
Key Features

J+S has designed a supply and filter manifold for full immersion and can be used as an independent or combined in-line filter assembly.

Dual redundant inputs
The Supply & Filter Manifold combines dual redundant inputs via an integral shuttle valve through a filter to provide a single clean output. The filter housing contains a stainless steel mesh filter element. Supply line pressure transducers are incorporated to provide indication of system status.
Key Features

J+S has designed a tooling DCV manifold suitable for double acting actuator functions.

The valves are designed to remain in set position until a pulse signal is sent to move to the opposite setting. Manifolds can be configured for multiple DCV’s. The Manifolds can also be combined by connecting in series to give various combinations to meet system requirements. E.g. A 22 DCV system with 4 Manifolds set at different locations on a tooling skid laid out as follows; 4-station + 6-station + 8-station + 4-station.

Key Features

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Phil Reid Managing Director >>
Phil has worked in the oil and gas industry for over 25 years. He started his career with Kvaerner FSSL progressing through a variety of roles in subsea engineering, from manufacturing to leading some of their most complex projects all over the world. He worked with the original J+S for a period before moving on to Genesis Oil and Gas as a Subsea Controls Engineering consultant; during that period he was seconded to Centrica Energy (now Spirit Energy) which led to a permanent role as Lead Subsea Controls & Umbilical Engineer for Developments, Capital Projects and Operated Assets. For almost a decade Phil successfully delivered Capital Projects from concept right through to project close out whilst also looking after the running of their subsea assets.
As part of J&S Subsea limited, Phil will oversee the day to day operations and grow the business both in the UK and globally.
James Morris – Engineering Director
James joined the Royal Navy from school where he successfully completed a 5-year Marine Engineering Apprenticeship. After 10 years’ service he started a career in hydraulic systems design, manufacture and project management.
After 5 years working in the hydraulic service industry James moved to Kvaerner Oilfield Products as a Support Engineer providing engineering support for production and service teams within the controls group. He was also responsible for the design, manufacture and offshore operation of the Control System Well Monitoring Equipment for Shell assets used during well intervention testing.
Whilst at KOP he completed an Open University Postgraduate Diploma home study course in Manufacturing: Management and Technology
He subsequently moved to RRC Controls Services where he was solely responsible for all the mechanical and hydraulic design of the company’s successful diver installable Subsea Control Module. Over 10 years at RRC he designed and built a range of bespoke subsea equipment from electrical and hydraulic Subsea Distribution Assemblies to Chemical Injection Flowmeter housings.
On moving to J+S Ltd as a Senior Engineer James continued to be responsible for design of subsea and renewables equipment including a new design ROV installable Subsea Control Module and next generation Medium Voltage dry-mate connection systems. During his 10-year tenure at J+S Ltd and SEA James has been promoted to Principal Engineer and then to Engineering Manager.
James has a wealth of knowledge in Project Management and design processes, using Solidworks 3D and document management software to produce highly configurable product designs in very short timescales.
As Engineering Director at J&S Subsea Limited, James looks forward to developing the engineering capabilities of the business, providing innovative designs, high quality products and responsive service to the Subsea Energy Industries.
Simon Smith – Business Development Director
Simon has worked in the oil and gas sector for over 20 years. He started his career as a planning co-ordinator for offshore development systems and has since been involved in both surface and subsea operation management both locally and overseas with Wood Group, Plexus Ocean Systems and Cameron’s before joining J+S Ltd in 2012 as a Senior Account Engineer. J+S Ltd then became part of SEA Ltd and the Cohort Group where Simon was promoted to Business Development Manager in 2019 before taking part in the management buyout of the Aberdeen based subsea division of SEA to form J&S Subsea Limited.
Simon initially studied Electronic and Electrical Engineering at Edinburgh University and later Engineering Design at The Robert Gordon University and recently became a Certified Project Management Associate through APM. Simon has experience with on and offshore support along with efficiency and safety control and has utilised this to deliver large scale projects for international clients in the energy industries.
As part of J&S Subsea limited, Simon plans to help grow the Subsea Energy business both in the UK and globally while championing a circular economy focus to help provide a better future.
Simon Smith
Matthew Blair – Executive Chairman
Matt has worked with SEA and previously J+S Ltd for over 10 years and has a wealth of industry knowledge and expertise. Matt works closely with Oil company subsea engineering and production controls departments, supporting their operational assets
Matt worked with Ferranti Computer Systems Ltd in the naval simulation group and through his extensive experience in electronics and sonar, moved into hydrographic survey working with Subsea7, Tritech, and CDL before joining J+S Ltd.

Matt has lead the management buyout of the Subsea Engineering division of SEA for J&S Subsea Limited and is seeking opportunities to transfer technologies and products into the Oil and Gas and marine renewables markets.