Micro motion ELITE Coriolis back flush recommended procedure

Dear Expert,

Perform SMV and monitor Drive Gain reading are one of method to make sure there is no sign of deposit, particle, or coating on coriolis tube. CMIIW.

Apart of that, we want to maintain the coriolis tube by performing back flush as part of our maintenance procedure.

- Is there any recommended practice or procedure on how to perform back flush on Coriolis Tube?,

- Is there any required solvent to be used along during flushing?,

Thank you in advance,



  • Hello Faiz.

    There are no restrictions on how to back flush the meter.  Because the meter has no moving parts you can flow forward or backward without any concern about damaging the meter.  Similarly, the solvent you use should be determined more by the nature of the material of the coating or scaling that you want to remove.

    Here is a link to the Micro Motion Corrosion Guide, which you can consult to make sure that any fluid you select to send through the meter is compatible with the material of construction of the wetted flow tubes in your meter.


  • In reply to Marc Buttler:

    Dear Marc,

    Thank for response and great explanation.

    Another question is:

    1. Is there any recommendation or common practice on how long does it take to soak the Coriolis tube with solvent/chemical?, --> the Duration
    2. Possible coating or scaling to be removed: Wax, Sand.
    3. Other info:
      1. Our Product Code: CMFHC2M453N2BAEZZZMCHT
      2. Solvent/Chemical we plan to use for soaking: Xylene

    Thank you in advance


  • In reply to Faiz Faiz:

    We do not have any detailed recommendation for how long it will take to remove coatings because this parameter may vary significantly depending on the nature of the coating material and other process parameters (temperature, pressure, composition, etc.). My best advice would be to monitor the density indication from the flow meter during the cleaning process. It is not certain, but you may see a slight trend in the indicated density value that will stop trending once the coating has been fully removed. Please note that this approach may only work under certain circumstances. It is also entirely possible that the cleaning process will be perfectly effective, but you won't see any trend in the density indication. For example, this might occur if the density of the wax is so close to the density of the fluid that there is no change in the overall density as the coating is removed. This is just one thing to try.