Volume compensating connector part of a connector unit

1. A connector part for a connector unit, the connector part comprising:

at least one volume compensating arrangement with at least a first flexible layer and at least a first chamber,

wherein the at least first flexible layer at least partially encases the at least first chamber, wherein the at least first flexible layer comprises at least one thermoplastic material,

wherein a surface of the at least first flexible layer that faces the at least first chamber comprises at least one coating.

2. The connector part according to claim 1 ,

wherein the at least first flexible layer has a thickness of about 0.2 millimeter (mm) to 2 mm.

3. The connector part according to claim 1 ,

wherein the at least first flexible layer is embodied as a thermoplastic diaphragm, and/or

wherein the at least first flexible layer is embodied as a flexible bellows, and/or

wherein the at least first flexible layer comprises at least two axially compressible sections arranged in axial direction of the connector part one after the other.

4. The connector part according to claim 1 ,

wherein the at least first flexible layer is arranged basically perpendicular to an axis of the connector part.

5. The connector part according to claim 1 ,

wherein the at least first flexible layer is arranged basically in parallel to an axis of the connector part.

6. The connector part according to claim 1 ,

wherein the volume compensating arrangement comprises at least a second flexible layer, and/or

wherein the at least second flexible layer partially encases the at least first chamber.

7. The connector part according to claim 1 ,

wherein the volume compensating arrangement comprises at least one security volume that is arranged directly adjacent to the at least first flexible layer of the at least first chamber in a direction basically coaxially to an axis of the connector part.

8. The connector part according to claim 1 , further comprising:

at least a receiving chamber, and/or

at least two volume compensating arrangements, and/or

wherein the at least two volume compensating arrangements are connected in parallel to the receiving chamber.

9. The connector part according to claim 1 , further comprising:

at least a receiving chamber, and/or

wherein the at least first flexible layer and a wall of the receiving chamber at least partially encase the first chamber, and/or

wherein the at least first flexible layer comprises at least two compressible sections, wherein one compressible section and a wall of the receiving chamber at least partially encase the first chamber and/or the other compressible section and a wall of the receiving chamber at least partially encase an at least second chamber of the volume compensating arrangement.

10. The connector part according to claim 1 ,

wherein the connector part is embodied as a male part and/or as a female part of the connector unit.

11. The connector part according to claim 1 ,

wherein the at least first flexible layer has a thickness of about 0.75 mm to 1.25 mm.

12. The connector part according to claim 1 ,

wherein the coating has a thickness of about 0.75 μm to 1.25 μm.

13. The connector part according to claim 1 ,

wherein the coating has a thickness of about 0.2 micrometer (μm) to 2 μm.

14. The connector part according to claim 13 ,

wherein the at least one coating comprises at least one corrosion resistant material.

15. The connector part according to claim 13 ,

wherein the coating is applied by one of the following methods: Physical vapour deposition (PVD), coating, high velocity oxygen fuel spraying (HVOF) and plasma spraying.

16. The connector part according to claim 13 ,

wherein the at least one coating comprises at least one metal.

17. The connector part according to claim 13 ,

wherein the at least one coating comprises titanium.

18. The connector part according to claim 1 ,

wherein the thermoplastic material is a Polytetrafluoroethylene (PTFE)-based material.

19. The connector part according to claim 18 ,

wherein the thermoplastic material comprises Polychlorotrifluoroethylene (PCTFE).

20. A connector unit for use in a subsea environment, the connector unit including

a connector part having a volume compensating arrangement comprising a flexible member at least partially defining a chamber for receiving a lubricant displaced when a male part of the connector unit is mated into a female part of the connector unit, the connector unit characterized by:

the flexible member comprising a thermoplastic material, and

a coating applied on a chamber side of the thermoplastic material.

21. The connector unit of claim 20 , further characterized by the thermoplastic material comprising a polytetrafluoroethylene (PTFE)-based material.