Exact Dual Rotor Turbine Concept

1. Unconditioned flow enters flow meter.
2. Straightening vanes smooth the flow as it enters the first rotor.
3. Flow transfers momentum to the first rotor, making it spin counterclockwise. Flow then exits rotor, with a clockwise spin.
4. Flow enters second rotor with a nearly perpendicular angle of attack, thereby transferring additional momentum to the second rotor. This additional momentum, results in greatly extended turndown.
5. Flow exits flow meter.
6. Dual pickoffs transmit the rotor frequency signal to remote instrumentation.

NOTE: The ratio of both pickoff frequencies are used for bearing diagnostics.

Dual Rotor Performance Advantages

1. Wider flow ranges – up to 500:1
2. No flow straighteners required
3. High shock design
4. Enhanced repeatability and overall accuracy