ABB Operating Instruction - FPD470 Wedge Flowmeter Differential Pressure – Primary Flow Element
Summary
The FPD470 Wedge flow meter is a robust differential pressure primary element engineered for precise volumetric flow measurement across diverse industrial applications, suitable for both clean and dirty service conditions. This comprehensive manual provides all necessary operating instructions—from expert installation and start-up procedures to detailed safety precautions, maintenance guidelines, and calibration checks. It is designed for process engineers, facility managers, and technical professionals requiring reliable, calibrated fluid measurement solutions.
Page 1 Text Content
Operating instruction OI/FPD470–EN Rev. A
FPD470 Wedge flow meter Differential pressure – primary flow element
Measurement made easy
Introduction WEDGETM Flow Elements utilize V-shaped restrictions to produce a square root relationship between differential pressure and volumetric flow. Elements are designed for either clean or dirty service and are offered in various materials, pipe sizes, and pressure ratings. The differential pressure is measured by a differential pressure transmitter. Various process connections on the WEDGE are provided for either pneumatic or electronic transmitters or other differential pressure sensing devices. Wedge meters can be flow calibrated and supplied with a factory calibration report, this includes calculations for the user’s process when such data is supplied. The differential pressure measurement is used to calculate flow using a standard wedge flow equation.
Page Summary Contents For ABB Operating Instruction - FPD470 Wedge Flowmeter Differential Pressure – Primary Flow Element
Manual Details
| Brand | Element |
|---|---|
| Pages | 20 |
| File Size | 1.04 MB |
| Published | June 03, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
How can I determine if the flow measurement is accurate at low rates?
The transmitter may show inherent errors when flow rates fall below 30% of maximum flow (9% of maximum differential pressure).
What steps are required during start-up operation?
You must perform a Zero check and a Span check using the procedures provided in the manual.
Are there different versions available for varying service conditions?
Yes, FPD470P is designed for clean service, while models FPD470F and FPD470C are intended for dirty service.
What preparation steps are needed before installing the flow meter?
It requires selecting an appropriate mounting location and ensuring adequate straight pipe run requirements.