EBME Forums Forums Maintenance Technical Assistance OXYLITRE FLOWMETER ISSUES

Hi All

Has anyone had issues with Oxylitre Flowmeters (Plastic body type) ??

When they are set to 2L the flowrate slowly decreases to 1.3/1.4L in approx. 30 to 45 Minutes.

And when the flowmeters are set to 10L the ball will raise up to 10.6L or some will rise to 11L after about 2 minutes.

Also, some have very tight knobs that are not smooth in operation, has anyone found this to be the case with certain batches?

This has occurred with other flowmeters and sounds similar to this issue in 2023: https://mhra-gov.filecamp.com/s/d/JC2zcBITk2olCpwX

In 2024, the standard ISO 15002 was revised and now includes a requirement to test specifically for this problem. The requirement is the flow should not change by more than +/-10% in one hour after a flow rate has been set. The rationale for the requirement explains orifices made of viscoelastic materials (e.g. polymers) can continue to deform for some time after a load is removed (e.g. when the needle of a valve is moved from a closed to an open position).