Patent attributes
A mechanical seal for sealing faces includes a fluid circulation groove including an inlet section where a fluid comes in from a high pressure fluid side, an outlet section where the fluid goes out to the high pressure fluid side, and a communication section that provides communication between the inlet section and the outlet section is provided in one of sealing faces of a pair of sliding parts that slide on each other. The fluid circulation groove is isolated from a low pressure fluid side by a land section R. At least a sectional area of the groove in the inlet section or the outlet section is set to be different from a sectional area of the groove in the communication section in such a manner that pressure of the fluid flowing through the fluid circulation groove is lowered in the communication section.
