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  1. InstrumentDept

    Brown Fluoride residue in Flowmeter - what is it?

    It would be a tiny sample, the orifice of the meter is 3/32 inch and that is the only place we see it develop. I guess I can start collecting it until I get a good sized sample.
  2. InstrumentDept

    Brown Fluoride residue in Flowmeter - what is it?

    At this point in the stream its just the chemical, chase water comes after this metering is done. We tried having it analyzed and the lab nearby said it needed to be water soluble and it wasn't.
  3. InstrumentDept

    Brown Fluoride residue in Flowmeter - what is it?

    I'm having an issue in my Hydrofluorosilicic acid (Fluoride) metering equipment where there is a brown substance that builds up and blocks the orifice. I cant find anything on the strainers ahead of it, nothing in the pumps or on the piping, just in the flowmeter. The meters wetted parts are...
  4. InstrumentDept

    Straining Raw water for the needs of instrumentation

    ashtree Thanks for your reply. Sounds like the self cleaning filter is my only option. I had looked at them but other than they appear to be only available in larger sizes, I hoped for a lower maintenance solution like a cyclone, but you have confirmed my thought that it was too good to be true...
  5. InstrumentDept

    Straining Raw water for the needs of instrumentation

    Hello all, I am looking for a strainer solution to clean out the majority of the fluffy algae products from a raw water stream into online instrumentation. This is a drinking water plant so we monitor the raw water for Conductivity, pH, UV254, ORP and of course Turbidity. I can't filter in...

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