Piston seal with solid lubricant applicator

A piston assembly comprising:

• a piston comprising at least one circumferential groove;
• and
• a sealing ringset comprising:
• at least one sealing ring comprising metal configured to be arranged in the at least one circumferential groove and configured to seal against a bore without liquid lubricant,
• a second sealing ring comprising a solid lubricant that is configured to prevent the at least one sealing ring from contacting the at least one circumferential groove, and
• an applicator comprising a solid lubricant configured to be arranged in the at least one circumferential groove and configured to provide lubrication between the at least one sealing ring and the bore.

A device comprising:

• a cylinder comprising a bore;
• a piston comprising at least one circumferential groove and configured to move axially within the bore;
• and
• a sealing ringset comprising:
• at least one sealing ring comprising metal configured to be arranged in the at least one circumferential groove and configured to seal against the bore without liquid lubricant,
• a second sealing ring comprising a solid lubricant that is configured to prevent the at least one sealing ring from contacting the at least one circumferential groove, and
• an applicator comprising a solid lubricant configured to be arranged in the at least one circumferential groove and configured to provide lubrication between the at least one sealing ring and the bore.