\”PAX mixer Lily impeller fan\” by PAX Water Technologies, image/information source: PAX Water
The Lily PAX Water Rotor, also known as the Lily Impeller, is a patented biomimetic mixer impeller developed by PAX Scientific (now PAX Water Technologies) for efficient water circulation in storage tanks. Invented by Jay Harman, it mimics natural spiral flow patterns like whirlpools and ocean currents to create powerful vortex mixing with minimal energy use.cleanwater1+3
Design Inspiration
The impeller draws from nature\’s \”Streamlining Principle,\” using computational fluid dynamics to replicate low-drag, centripetal flows observed in seaweed, tornadoes, and water bodies. At just 8 inches (21 cm) tall and shaped like a calla lily with Golden Ratio proportions, it generates ring vortices for persistent, friction-minimal circulation.steemit+3
Key Applications
PAX mixers with the Lily impeller prevent thermal stratification, disinfectant loss, nitrification, and ice damage in potable water tanks. They suit mid-to-large tanks, operate on low power (equivalent to three 100W bulbs for millions of gallons), and install easily via hatch or diver without tank modifications.
Performance Specs
- Circulates entire tank volumes top-to-bottom rapidly.
- Horizontal eductor variants (e.g., Tank Shark) handle shallow tanks or tough conditions with 75-500 GPM flow at 50 PSI motive water.[cleanwater1]
- Minimum 6 feet water depth recommended for optimal vortex setup.[cleanwater1]
