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The Armstrong float and thermostatic steam trap, model D503913, features a 1/2 inch in-line inlet connection. This model is constructed from cast iron and has a maximum operating pressure of 15 psi. The trap includes a thermostatic air vent element designed to respond to the pressure-temperature curve of steam across various pressures, from less than twenty inches of mercury vacuum to thirty psi gauge.
This steam trap effectively vents air at slightly below steam temperature across its operational range, making it suitable for heating applications that require continual drainage and high air-venting capacity.
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