30 Series Free-Floating Lever Air/Gas Vents—Forged Steel


For pressures to 1,000 psig (69 bar) or specific gravity down to 0.40

32-AV, 33-AV and 36-AV are forged steel vents using the same proven free-floating lever mechanisms used in Armstrong steam traps. They are ideal for applications where high air/gas venting capacity is required, up to 1,000 psi (69 bar). They are available with screwed, sockeweld or flanged connections.

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    High-temperature service

    Maximum allowable working pressures of floats decrease at temperatures above 100°F (38°C). Allow for approximately:

    • 10% decrease at 200°F (93°C)
    • 15% decrease at 300°F (147°C)
    • 20% decrease at 400°F (204°C)

    The float is not always the limiting factor, however. Consult with the Armstrong Application Engineering Departmentif you have a high-temperature application that also requires maximum operating pressure.

    Sour gas service

    Forged steel and stainless steel traps can be
    modified to resist hydrogen sulfide stress corrosion. These
    modifications involve annealing the float, which will reduce the maximum
    working pressure of the float to about half of its normal value.
    Consult Armstrong Application Engineering for allowable working