Flow tubes - Imperial flow tubes combine increased rangeability with lower permanent pressure loss. These tubes are offered in flanged type, weld-in, and insert. Imperial flow tubes are a versatile differential pressure device capable of extreme pressure and or temperature limits, yet maintaining highly accurate readings with the lowest permanent pressure loss.

Accuracy - The completeness of published research data permits Imperial to provide the ASME type tube with an accuracy or .5 percent without the need of flow calibration. Flow calibration is available to provide nozzles with .25 percent accuracy when necessary.