Armstrong float and thermostatic steam traps

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Armstrong heating equipment

Steam traps and steam tracing equipment

Armstrong float and thermostatic trap is a mechanical trap that operates on both density and temperature principles. The float

valve operates on the density principle: a lever connects the ball float to the valve and seat. Once condensate reaches a certain

level in the trap the float rises, opening the orifice and draining condensate. A water seal formed by the condensate prevents

live steam loss.

Since the discharge valve is under water, it is not capable of venting air and non-condensables. When the accumulation

of air and non-condensable gases causes a significant temperature drop, a thermostatic air vent in the top of the trap

discharges it. The thermostatic vent opens at a temperature a few degrees below saturation so it’s able to handle a large

volume of air – through an entirely separate orifice – but at a slightly reduced temperature.

Armstrong F&T traps provide high air-venting capacity, respond immediately to condensate and are suitable for both industrial and HVAC applications.

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