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In-line Connection (suffix Code "-IC") - Parallel-pipe inlet/outlet connections are standard as shown. An optional In-line inlet/outlet connection is available.

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Vacuum Breaker (suffix Code "-VB") - The Vacuum Breaker allows air to enter the steam or liquid system in order to "break the vacuum" caused by the condensing of steam or draining of liquid from a system.

Operating Condition
Condensate Load  

FTE / FTES Float & Thermostatic Steam Trap

FTE-Series have Ductile Iron Bodies and FTES-Series have Cast Steel Bodies. These Float and Thermostatic Steam Traps are intended for use on steam process applications with very high condensate load requirements. Examples include re-boilers, absorption chillers, large air-handling equipment and heat exchangers. They contain a high quality welded stainless steel thermostatic air vent and all stainless internals. F&T traps have excellent air-handling capability, making them the preferred choice for most process applications.

Size Connection PMO (PSIG) Max Capacity
1-1/2" - 2-1/2" NPT 200 105,000 lbs/hr

ModelSizeTypeBody MaterialOptionsMax PMO (psig)Max Capacity @ Max PMO (lb/hr)
FTE-020-17-N2"NPTIron Body20
FTE-050-17-N2"NPTIron Body50
FTE-050-18-N2 1/2"NPTIron Body50
FTE-125-18-N2 1/2"NPTIron Body125
FTE-200-16-N1 1/2"NPTIron Body200
FTE-200-17-N2"NPTIron Body200
FTE-200-18-N2 1/2"NPTIron Body200
Product Overview
PROCESS: FTE Series are high capacity steam traps specifically designed to remove condensate and air from HVAC and industrial process applications with extremely high condensate load requirements. Examples include reboilers, absorption chillers, large air-handling coils, large heat exchangers and other large process equipment. It is available with a ductile iron body and contains a high quality welded stainless steel thermostatic air vent and stainless mechanism. F&T traps have excellent air-handling capability, making them a better choice than Inverted Bucket traps for most process applications.

The FTE are used for extremely high capacity condensate drainage applications.
• Ductile Iron has a higher pressure and temperature rating and is more resistant to shock loads than Cast Iron
• Cast Steel Body will allow operating pressures and temperatures up to 300 PSIG and 450 °F
• High capacity steam trap for draining large process equipment (over 100,000 lbs/hr)
• All stainless steel internals with hardened seat and wear parts
• In-line repairability is simplified by having all internals attached to the cover
• Welded stainless steel thermostatic air vent resists shock from waterhammer. Live orifice air vent is available for superheated applications
• Excellent air handling capability allows air to be discharged rapidly so steam can enter the system quickly during start-up
• F&T traps discharge condensate immediately as it is formed (no condensate will back up into the system)
How It Works
Float and thermostatic traps contain a float and seat mechanism with a separate thermostatic element which work together to remove both condensate and air from the steam system. The float, which is attached to a valve, rises and opens the valve when condensate enters the trap. This allows the condensate to discharge. Air is discharged through the thermostatic air vent to the outlet side of the trap. Steam entering the trap causes the thermostatic element to expand, closing the air vent and trapping the steam.
Selection / Sizing / Capacities
The PMO (maximum operating pressure) rating of model selected must meet or exceed the maximum steam pressure or the trap may no t open. For example; the FTE-125 has a PMO of 125 psi. Condensate capacity (lbs/hr) of the trap is based on the differential pres sure across the trap. The condensate loads (lbs/hr) for process applications are normally calculated at the maximum steam pressure; then an appropriate safety margin is applied in order to select a trap with sufficient capacity when operating at lower steam pressures. Reference full explanation of Safety Load Factors in Steam Traps Introduction section.
When a temperature control valve is regulating flow to the process equipment, it is recommended to select a trap with a PMO that will exceed the inlet steam pressure to the control valve.

For Example:
Process application has a maximum steam inlet pressure of 100 psi, a maximum condensate load of 10,000 lbs/hr and is discharging to a condensate return line with a possible back pressure of 25 psig. Δ P = 100-25 = 75 PSI

To select trap :
If the Safety Load Factor is chosen to be 2X max capacity at max differential pressure, then Trap should be selected based on 20,000 lbs/hr (10,000 x 2 = 20,000) at 75 PSI differential pressure with a PMO in excess of 100 PSIG

Selection :
FTE-200-17-N , PMO=200 PSIG, 2” NPT with a condensate capacity of 21,500 lbs/hr at 75 PSI differential pressure.

Dimension and Weights
Live orifice air vent for superheated steam applications. Parallel-pipe inlet/outlet connections are standard as shown. An optional In-line inlet/outlet connection is available; contact factory.
Installation and Maintenance
The trap must be installed upright and level for the float mechanism to operate properly. All internal components can be replaced with the trap body remaining in-line. Repair kits include thermostatic air vent, float, valve seat and disc, and gaskets. The FTES Series have cast steel bodies and are available in 2 1 / 2 ” NPT, socket weld and flange connections. The standard thermostatic air vent can be damaged by superheat; therefore, in applications with superheated steam, the thermostatic air vent should be replaced with a special “live orifice” air vent.