Sliding component

A sliding component comprising a first annular sliding part and a second annular sealing part that have a first sealing face and a second sealing face, respectively, the first sealing face and the second sealing face being relatively slidable to each, other, the first sealing face is provided with:

• radial-direction grooves communicating with a high-pressure fluid side through the outer periphery of the first annular sliding part but isolated from a low-pressure fluid side by a seal area;
• an annular pressure release groove communicating with the high-pressure fluid side through the radial-direction grooves but isolated from the low-pressure fluid, side by the seal area:
• first pumping grooves each communicating with the high-pressure fluid side through the annular pressure release groove and the radial-direction grooves but isolated from the low-pressure fluid side by the seal area and also angled to discharge a fluid toward the high-pressure fluid side by sliding relative to the second sealing face,
• second pumping grooves each communicating with the low-pressure fluid side through an inner periphery of the first annular sliding part but isolated from the high-pressure fluid side by the seal area and, also angled to discharge the fluid toward the high-pressure fluid side by sliding relative to the second sealing face,
• positive-pressure generation grooves configured to generating positive-pressure by sliding relative to the second sealing face, the positive pressure generation grooves each indirectly communicating with the high-pressure fluid, side through the radial-direction grooves and also directly communicating with the high-pressure fluid side through the outer periphery of the first annular sliding part, and
• the positive-pressure generation grooves having width in a circumferential direction that is longer than width in the circumferential direction of the radial-direction grooves.