Float traps are manufactured in a variety of sizes, shapes and configurations. The most commonly used for steam service is the Float and Thermostatic, or F&T. F&T traps combine the excellent air venting capabilities of a thermostatic trap with the liquid level controlling capabilities of a float trap. During startup, before condensate reaches the trap, the thermostatic element is fully open to discharge air. The float rests on the lower seat. As hot condensate and steam reach the trap, condensate lifts the float, allowing condensate to flow out of the trap. As the condensing rate decreases, the float lowers, reducing flow through the trap. The buoyancy of the float will maintain a liquid level seal above the lower seat ring, preventing the escape of steam.
A contrasting characteristic of the float and thermostatic trap and the inverted bucket trap is the discharge cycle. A float & thermostatic trap tends to continuously discharge condensate while the inverted bucket trap discharges condensate in discreet cycles.
Spence Engineering offers the FTN series, Max-Flo HC series and the FTE In-line series of F&T traps.
Download the complete technical specifications for Float & Thermostatic
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