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Sterlco Sterling

Sterling Steam Control

Sterlco Engineering Co., Inc., Sterlco Sterl Co. Sterling


Phone: 847-356-0566      Fax: 847-356-0747      E-Mail:

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Sterlco Sterling Steam Control Products

Steam Traps; Float & Thermostatic (F&T), Radiator Traps, Inverted Bucket

Float & Thermostatic steam traps (F & T Traps) are preferred for efficient, economical vacuum, and pressure service. Sterlco® Inverted Bucket Steam Traps are commonly used wherever complete and rapid removal of condensate is essential. Install F&T traps in steam applications such as Instantaneous Heaters, Steam Humidifiers, Steam-Jacketed Vessels, Unit Heaters, Sterilizers and other similar equipment.

Sterlco® F&T Trap

Design & Operation

Spec & Tech Sheets       

F&T Trap FT4-1151
F & T Trap

Benefits & Features

The Sterlco® Float and Thermostatic (F&T) Trap contains a balanced pressure thermostatic air vent and main float operated valve for condensate removal. Air initially has free access to discharge until surrounded by high temperature which closes the vent. As condensate fills the trap body, the float rises, opening the main valve and discharging the condensate as it is received. The F&T is a fully modulating type trap that responds immediately or continuously to condensate discharge. The liquid level within the body is preset above the main valve, assuring that, when discharging, the orifice sees only liquid, thereby preventing the loss of live steam.



Thermostatic Radiator Traps
(The Smart Trap)

Design & Operation

Spec & Tech Sheets       

Radiator Smart Trap
Thermostatic Radiator Trap

Benefits & Features

In a trap which is cold, or which is full of condensate below the boiling point, the Sterlco® thermostat remains compressed because of its internal vacuum. The trap is open and condensate flows out.

Whenever live steam strikes the bellows, the water inside the thermostat starts to vaporize or boil. As soon as the steam pressure inside the thermostat becomes almost equal to the steam pressure surrounding the thermostat, the spring action of the bellows causes it to extend itself and close the trap. Because the thermostat is filled with pure water, the relationship of inside and outside pressures is always the same. This trap will always pass condensate and hold back steam in spite of any variations in steam pressure.



Sterlco® Inverted Bucket

Design & Operation

Spec & Tech Sheets       

Sterlco Inverted Bucket Trap
Inverted Bucket Trap

Benefits & Features

On start up, the bucket, by its own weight, rests on the trap bottom. The main valve is open, allowing the discharge of air and non-condensables. As condensate fills the body, it creates a seal on the open end of the bucket, which then becomes buoyant and rises, closing the main valve. Condensate, however, continues to enter the trap and force the air within the bucket out through the vent hole, causing it to lose its buoyancy and sink, opening the main valve to discharge. Condensate is discharged until steam reaches the trap and fills the bucket, which regains buoyancy and the operating cycle is repeated.



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Phone: 847-356-0566      Fax: 847-356-0747      E-Mail: