Two-Phase Flow Applications
The unique design of the Equilibar® back pressure regulator gives it the ability to handle two-phase or mixed-phase flow streams while maintaining high precision.
In every pressure regulator or control valve, there is a rapid acceleration when the fluid passes through the valve seat. Because of the large difference in density between gases and liquids, the performance of traditional regulators can be severely affected when a slug of liquid reaches the valve seat. For a pressure reducing regulator, this would be experienced as a sudden pressure drop on the outlet, while a back pressure regulator would experience a sudden pressure rise on its inlet.
Because the Equilibar uses multiple orifices and a totally different seat design, the inlet pressure is not affected when some of the orifices transition to liquid phase. (See how it works) So long as some of the orifices remain dominated by the gas phase, these remaining orifices are able to maintain the stable inlet pressure that our customers have come to expect.
This mixed-phase capability can be especially useful for processing condensate from a fuel cell or entrained liquids from a research reactor. Some of our customers have commented that they found absolutely no effect on pressure performance at 10 times the expected condensate load.
Contact our engineers to determine which Equilibar back pressure regulator is best suited for your unique two-phase flow application.
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