Sight Flow Indicators

OPW fittings

Sight Flow fluid monitor


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OPW Swivel Joints and Fittings

Sight Flow Indicators

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OPW Swivel Joints and Fittings

Sight Flow Indicators

Sight Flow Indicators

OPW Visi-Flow® Sight Flow Indicators

Visi-Flo® sight flow indicators by OPW provide a quick, reliable, and economical way to verify flow and monitor fluid color and clarity in process lines. All units feature dual glass for see-through visibility. Propeller, flapper, drip-tube and plain types available in 1/4" to 12" sizes in steel, stainless steel, bronze, dectile iron and specialty alloys.

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  • Spark-proof Tank Car Sockets Keep Workers Safe

    We have done business with your company before and the results have been excellent. We unload a flammable product, and this product keeps our team members safe. The item is high quality, the price is lower than other products on the market, and the sales team delivered on the promise of a quick delivery.

    Dustin Conner

  • Sight flow valve OPW Swivel Joints Fittings

    Fast service and friendly staff

    It took awhile for us to figure out what I needed but, after pictures were sent, it took 3 days to receive the product. Fast service and friendly staff.

    Les Fertig
    Western Iowa Energy

  • Sight flow indicators


    Very good product design with a large view area of site glass, cuts operational cost as well as a ergonmic asset, and cuts percentage of costly lost time accidents.

    Ed Guillory
    Kinder Morgan

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