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’s career started when he joined the Royal Navy from school as an Artificer Apprentice. After a 5-year Marine Engineering Apprenticeship he served in surface ships HMS Glamorgan, HMS Edinburgh, and HMS Glasgow and at Rosyth as part of an engineering support team. 

Moving into the Oil & Gas Industry in 1992, over the next 26 years he gained a wealth of experience within large and small companies on operation, design and project management of subsea control systems and equipment. This period started with several years as a Project Engineer for a family run hydraulic services company Grampian Hydraulics followed by 5 years as a Support Engineer at Kvaerner Oilfield Products.  James joined RRC Controls Services ltd in 2001 before finally moving to J+S Ltd in 2010. At J+S his dedication and technical capabilities were rewarded with several promotions until becoming a member of the management buyout team. 

He has designed an extensive array of subsea equipment from basic cable penetrators to complete subsea control modules. 

James thrives on providing solutions for client’s problems. 

As Engineering Director, James will ensure that the company provides clients with timely, cost effective and technically sound solutions and services. 

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 Blair is Chairman of J+S Subsea which was formed in October 2020 through a management buyout of the Subsea Engineering Division of Systems Engineering and Assessment Ltd. 

With J+S Subsea and SEA for over 14 years, Matt has a wealth of industry knowledge and expertise.  Matt works closely with Oil company subsea engineering and production controls departments, supporting their subsea operational assets. 

Previously an Electronics Engineer with Ferranti Computer Systems Ltd specializing in sonar and command systems, Matt moved into hydrographic survey working with Subsea7, Tritech, and CDL before joining J+S Subsea.  

He is Vice Chair of the Decom Leadership Group of Decom North Sea and in that role has facilitated industry and academic studies on potential for reuse and repurposing of decommissioned equipment.   

Matt is seeking further opportunities to update and transfer Oil and Gas technologies and products into the Marine Renewables markets and help to develop the broader circular economy.