variable-area flow meter / for liquids / compact / direct-reading
FPD Riels Instruments



  • Technology:


  • Fluid:

    for liquids

  • Other characteristics:

    compact, direct-reading, plastic tube, in metering tube

  • Process pressure:

    Max.: 2,500,000 Pa (362.59 psi)

    Min.: 0 Pa (0 psi)

  • Process temperature:

    Max.: 70 °C (158 °F)

    Min.: 0 °C (32 °F)


The FPD Series manufactured by Riels is a type of a flowmeter extension diaphragm that is used for liquid substances. It is made up of a carbon steel (AISI 304) construction and has a compact size. This device is made from a carbon steel construction and has a compact and light-weighted design. Also, this device is characterized as a shock-proof device and is capable of controlling and measuring large flow rates in small places.

Moreover, the FPD flowmeter extension diaphragm is applicable for water treatment plants, pressure boosters, fire situations and many more. This device works with a maximum temperature ranging up to 70°C and a maximum pressure ranging up to PN25. It has a flowing liquid range of 900 mc/h.