Does a dual-rotor flow meter need straight pipe runs?
No straight runs needed (PD principle). Install 100-200 mesh filter upstream; horizontal/vertical OK; heat-trace high-viscosity lines in winter.
No. As a positive displacement meter, measurement is independent of flow profile, so no upstream/downstream straight runs are required — a clear advantage over velocity-type meters (turbine, vortex).
Installation tips: 1) Install a filter (100-200 mesh) upstream to protect rotors; 2) Horizontal or vertical mounting allowed, follow flow arrow; 3) For high-viscosity fluids in winter, heat tracing prevents rotor stalling; 4) Flush new pipelines before installing the meter.
Selection & Installation
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