These units complement the commonly used Low Flow Series, but use a slight bit more flow than zero in which case the Zero Flow Series is better suited. This makes it suitable for process control in situations with extremely little flow in the process. Ultra Low Flow (ULF) pressure regulators can be applied in processes operating with pressures ranging from subatmospheric pressure up to 690 bar (10.000 PSI)!
The ULF series of ultra low flow pressure regulators offer 3 different units with their own pressure ratings for optimal configuration: U3L units up to 206 bar gauge (3000 PSI), U6L units up to 412 barg (6000 PSI) and U10L units that can withstand 690 barg (10.000 PSI).
Ultra low flow back pressure regulators
This Ultra Low Flow back pressure regulator is made of stainless steel, and it has got a slightly conical-shaped edge. The diaphragm shields directly on the conical-shaped orifice. Applying pressure to the regulator results in an ultra-low flow performance.