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Frequency response for the high response valves integrated in the ISA v2 and ISA v5 (solid lines for magnitude and dashed lines for phase responses). The lines show the frequency response for the high response valve (HRV) of the ISA v2 presenting cut-off frequency around 320 Hz. The black lines show the frequency response for the ultra-low leakage valve (ULLV) integrated in the ISA v5 presenting a cut-off frequency around 120 Hz.
