At Hannover Messe, Bosch Rexroth will present a disruptive innovation for electrically actuating valves in the subsea process industry. The new SVA R2 Subsea Valve Actuator is the world’s first electric actuator that can replace conventional hydraulic cylinders with field-proven safety technology and without taking up additional space. The integrated electric controller offers precise motion control. Thanks to condition monitoring and a safety spring, the SVA R2 satisfies Safety Integrity Level (SIL) 3 in accordance with IEC 61508 and IEC 61511. The use of internationally standardized interfaces throughout means even more standardization in the subsea process industry. The actuator minimizes energy consumption and is geared toward delicate ecosystems. At the same time, the installation and operating costs are reduced. The functions, operating life, and safety of the actuator have already been successfully tested in accordance with international standards. When the SVA R2 is used in subsea factories at a depth
of up to 4,000 meters, hydraulic pipes or power units are no longer required. The electric supply pipes which are already installed for sensors are adequate to ensure the reliable operation of the actuators.
For the agile development of the SVA R2, the Bosch Rexroth team worked closely with several suppliers and operators of offshore installations, as well as international universities. The new module comprises a pressure-compensated container that contains an electric drive, a motion control system, and a safety device – and can replace the hydraulic cylinders previously used on a 1:1 basis. It requires only one cable for the power supply and communication. The SVA R2 is designed to actuate valves reliably with the power supply that is commonly used for subsea sensors.
The Subsea Valve Actuator is designed for high volume production. The electronics for the motion control system are from the automotive division and offer proven robustness and reliability. The SVA R2 is protected by several patents and is designed to operate for 25 years.
