Pressure compensator for a subsea device and manufacturing method

A method of manufacturing a pressure compensator for a subsea device, the pressure compensator providing pressure balancing between a chamber of the subsea device and the surrounding environment when the subsea device is installed at a subsea location, the method comprising:

• providing an intermediate compensation chamber by providing a compensator enclosure, sealed against the subsea environment, the compensator enclosure including a bellows portion that is deformable to change the volume of the intermediate compensation chamber;
• providing a flexible hose inside the intermediate compensation chamber, wherein a volume inside the flexible hose between two open ends of the flexible hose provides a main compensation chamber;
• providing a flow connection between the main compensation chamber inside the flexible hose and the chamber of the subsea device;
• and
• sealing the main compensation chamber inside the flexible hose from the intermediate compensation chamber in a liquid tight manner, the flexible hose being deformable to change the volume of the main compensation chamber to accommodate volume changes of a liquid contained in the chamber of the subsea device.