Holland Hydraulics B.V. has provided turnkey hydraulic systems for control equipment for three projects in the offshore wind industry. These NMS (Noise Mitigation System) systems are used to reduce the noise generated during the piling process of offshore wind turbine foundations. The hydraulic installations control handling functions that ensure a more efficient and faster working process and are installed on the inside of the tool.

NMS6000

The first project was for the NMS6000. The system can be used in foundation piles with a diameter up to 6 meter. The system consists of a hydraulic manifold, with a capacity of 3300kW and a flow of 4400L/Min. This manifold ensures an optimal positioning of the foundation pile and for the control of 3 rotating drives to be able to turn the foundation pile, if necessary. A pneumatic manifold is used for damping during piling. The electrical control system is also supplied with the system.

NMS8000

The 2nd project was for the NMS8000 The system can be used in foundation piles with a diameter up to 8 meter .The system contains a hydraulic manifold, which controls 6 hydraulic cylinders. These cylinders take care of the clamping of the foundation pile. The manifold also controls 3 hydraulic cylinders, in combination with 3 rotating drives, to be able to rotate the foundation pile. This project also includes a pneumatic manifold, which is used for the damping during piling, and the electrical control system.

NMS8800

The 3rd project was for the NMS8800. The system can be used in foundation piles with a diameter up to 8.8 meter. This system consists of 2 hydraulic manifolds. The first manifold controls 6 hydraulic cylinders for clamping the foundation pile and controls 3 hydraulic cylinders in combination with 3 rotating drives to rotate the foundation pile.

The second manifold controls 16 hydraulic cylinders which ensure a controlled movement of the NMS during lifting, after the installation of the foundation pile has been completed. This project also includes an electrical control sytem and a pneumatic manifold.

The systems of the three projects operate with the highest precision to prevent damage to pipes and NMS, with pressures up to 420 bar. The stainless steel piping of the systems, was prefabricated in our workshop in Hengelo and then, after the FAT test, installed on site by our commissioning team. After successful SAT-tests the three projects were completed.

Holland Hydraulics provided the entire turnkey solution, from advise, engineering and development to installation and commissioning on site.