Low energy tandem seal.

摘要

The seal includes an end face seal 60 cooperatively interconnected to a dynamic seal 30 for sealing the circumferential space 20 between a housing 14 and a shaft 16. Under static non-operating conditions, the end face seal 60 precludes fluid loss from the housing 14. Upon rotation of the shaft 16, the low energy dynamic seal 30 provides fluid pressure which opposes loss of fluid from the housing and which disengages the end face seal 60 to avoid a loss of energy and to reduce wear.