FLUID PRESSURE REGULATING AND CONTROL DEVICE

摘要

A controlled leakage device is provided which can control the flow of fluid out of a chamber over a wide range of fluid conditions, i.e., from subcooled liquid to superheated vapors. A hydrostatic balancing system is utilized to cause the seating force on a pressure barrier member to be related to the lifting force on the barrier member. Thus, the device can be constructed to remain in balance over the large change in lifting force that results when the fluid changes phase. Possible applications for the device include safety and relief valves for pressurizers, steam generators and boilers, and shaft seals.