When low suction pressure or low tank levels are expected, Cryodynamics pumps are fitted with a high-solidity helical inducer as the first hydraulic stage. This allows the unit to operate at extremely low tank levels which virtually eliminates "dead stock" while maintaining stable operation over a wide flow range.

The inducer blades are tapered, with a thicker blade width at the root, to provide the strongest blade design possible. This design has proven extremely effective and reliable in more than 4500 pumps built to date.

Recent developments in this area have resulted in a variable pitch inducer which can further reduce NPSH required when lower than normal liquid levels are expected.