A. Tube: Borosilicate glass, stainless steel, Hastelloy, Monel, and Alloy 20. Float: Conventional type—brass, stainless steel, Hastelloy, Monel, Alloy 20, nickel, titanium, or tantalum, and special plastic floats. Ball type—glass, stainless steel, tungsten carbide, sapphire, or tantalum. End Fittings: Brass, stainless steel, or alloys for corrosive fluids. Packing: The generally available elastomers are used and O-rings of commercially available materials; Teflon is also available.
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