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Steam Lock Release - When a trap is installed above the discharge of the process, the trap can be locked due to trapped steam in the piping. To help eliminate this requires an optional steam lock release mechanism.

Operating Condition
Condensate Load  

FTTS Float & Thermostatic Steam Trap

FTTS-Series Float and Thermostatic Steam Traps have Stainless Steel Bodies ••• All Stainless Steel Internals ••• 225 psig Operating Pressures. These Steam traps are used where frequent System wash down is required or when rust and other surface corrosion cannot be tolerated such as in facilities used for Food and Beverage or Pharmaceutical production.

Size Connection PMO (PSIG) Max Capacity
1/2" - 1" NPT, SW 225 5,825 lbs/hr

ModelSizeTypeMax PMO (psig)Max Capacity @ Max PMO (lb/hr)
FTTS-065-12-SW1/2"Socket Weld65
FTTS-065-13-SW3/4"Socket Weld65
FTTS-065-14-SW1"Socket Weld65
FTTS-145-12-SW1/2"Socket Weld145
FTTS-145-13-SW3/4"Socket Weld145
FTTS-145-14-SW1"Socket Weld145
FTTS-225-12-SW1/2"Socket Weld225
FTTS-225-13-SW3/4"Socket Weld225
FTTS-225-14-SW1"Socket Weld225
Product Overview
DRIP, PROCESS:  FTTS Series steam traps with CF8M Stainless Steel Body and in-line pipe connections are used for the removal of condensate and air in HVAC and industrial process applications such as unit heaters, water heaters, pressing machines, heat exchangers and coils. They works same as FTT Series, however  the FTT Series have Max Operating Steam Pressure up to 300 PSIG but FTTS Series have it up to 225 PSIG.
• Ductile Iron has a higher pressure and temperature rating and is more resistant to shock loads than cast Iron
• 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 not open. For example; the FTTS-145 has a PMO of 145 psi. Condensate capacity (lbs/hr) of the trap is based on the differential pressure across the trap. For drip applications, a 1/2" FTTS size is generally sufficient to exceed warm-up loads with a 2X safety factor. 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 the 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 2,500 lbs/hr and is discharging to a condensate return line with a possible back pressure of 25 psig. ΔP = 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 2,000 lbs/hr (1,000 x 2 = 2,000) at 75 PSI differential pressure with a PMO in excess of 100 PSIG

FTTS-145-14-N, PMO=145 PSIG, 1” NPT with a condensate capacity of 2,920 lbs/hr at 75 PSI differential pressure.

Connection Code: N=NPT, SW= Socket Weld, PMO=Max Operating Pressure.

Dimension and Weights

Live orifice air vent for superheated steam applications.
• NPT Connection for freeze protection
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 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.