Use of the Type 26 Inspirator in place of a Mooney Restrictor maximizes flow through the regulator at times when the pressure differential across the valve falls below the published valve minimum differential pressure for full capacity.
The Type 26 Inspirator incorporates a special nozzle design that reduces the loading (spring case) pressure to a value below the outlet pressure, allowing the valve to fully open even when the pressure differential is very small. The Inspirator acts like a differential amplifier with a gain of approximately 3.