A sealing system (1) to prevent loss of a process fluid from a device (2) having a device opening (3) and a rotating member (4) operable for rotational movement within the device opening (3). A rotary shaft seal (10) seals the rotating member (4) to inhibit leakage of process fluid. A chamber (12) is connected to the device (2) to recover leakage of the process fluid that leaks from the rotary shaft seal (10). A barrier seal (20) is connected to the chamber (12) to inject a barrier fluid under pressure to prevent the escape of process fluid from the chamber (12). The chamber (12) discharges a mixture of barrier and process fluid to a filter (26), such as a coalescing filter, to separate the barrier fluid from the process fluid. Barrier fluid vapor (28) and water vapor traps (30) can also be used for purification purposes. The barrier fluid is recovered and recycled back to the barrier seal (20). The process fluid is returned to the device (2).
