Article

Koso Kent Introl (KKI) has reached a pivotal milestone with the completion of its development and qualification program for the Series 1275 dynamic subsea control valve range. This breakthrough is poised to revolutionize subsea processing, carbon capture utilization and storage (CCUS), and hydrogen storage sectors—areas where precision control has historically been elusive.

Traditionally, subsea systems relied on rudimentary choke mechanisms that, while functional, often compromised accuracy and operational efficiency. Such limitations become critical in applications like subsea separation, boosting CCUS injection, and hydrogen storage, where precision directly impacts infrastructure effectiveness.

The Series 1275 valve range emerges as a sophisticated solution to these challenges. KKI drew upon decades of expertise in topside process control valves, adapting proven designs into a robust subsea format. Each component, from the mechanical operator to the sealing system, is engineered to endure the harsh realities of subsea environments.

The rigorous qualification testing involved collaboration with leading oil and gas operators to ensure that the final product met or exceeded real-world expectations. KKI undertook one of the most extensive endurance testing programs for subsea control valves, adopting a conservative, safety-first philosophy that acknowledges the high costs and complexities of subsea maintenance.

General testing protocols incorporated hydrostatic pressure trials, seat leakage checks, and API 6A PSL 3G gas testing. More specialized qualifications included hyperbaric testing per API 17D and ISO 13628 standards, and endurance testing defined in partnership with clients. KKI's significant investment in upgrading its in-house test facilities not only expedited the project but also positioned the company for future advancements in subsea technology.

The Series 1275 brings several groundbreaking features, including a low-friction mechanical operator that utilizes an inverted planetary roller screw (IPRS) for enhanced positioning accuracy. The operating torque is reduced to less than 25% of typical subsea choke operators, which is complemented by advanced stem hard coating for improved wear and corrosion resistance. Moreover, the new gland seal packing system accommodates the extensive stem movement typical in subsea operations, ensuring long-term sealing integrity.

KKI's legacy in subsea valve innovation dates back to 1986, when it delivered its first subsea control valves for the Argyll field in UK waters. Since then, the company has continually evolved its subsea capabilities alongside the industry's growing interest in comprehensive seabed processing systems. KKI has introduced numerous innovations, such as deep-water retrievable chokes and lightweight choke inserts, establishing a global reputation with over 1,000 subsea choke valves supplied worldwide.

With the launch of the Series 1275 dynamic subsea control valve range, KKI reinforces its leadership in subsea flow control technology. As the energy sector accelerates towards subsea processing, CCUS deployment, and hydrogen storage, the demand for reliable, precision-engineered subsea control valves becomes increasingly critical.

This new range not only addresses a historical technology gap but also offers operators a proven, qualified solution that enhances efficiency while withstanding the harshest subsea conditions. Qualified for water depths of up to 3,048 meters and made from corrosion-resistant alloys, the Series 1275 is set to meet diverse operational requirements, whether operated remotely or electrically.