FTN FLOAT &
THERMOSTATIC TRAP
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Air entering trap is immediately discharged through
the high capacity integral air vent. The thermostatic
vent will close just prior to saturation temperature.
The balanced design will allow venting of non-condensibles that collect in the float chamber when operating
at design pressure. When steam enters the trap, the
thermostatic air vent closes to prevent steam loss.
When steam gives up it’s latent heat, it becomes condensate. This “condensate” enters the trap and causes the
stainless steel ball float to rise. Raising of the float opens
the discharge valve, allowing condensate to be continuously discharged as it enters the trap. The condensate level
in the trap body is maintained above the discharge seat,
providing a positive seal against the loss of steam.
FTN SERIES
FLOAT & THERMOSTATIC
STEAM TRAPS
Pressures To 125 PSIG (8.6 barg)
Temperatures to 450°F (232°C)
Universal Four-port Design — Four possible hookup
combinations of the “H” pattern body and piping
dimensions similar to other major manufacturers allow
maximum installation flexibility for easy replacement of
other traps. Inlet and outlet taps on larger sized traps
located in the cover to permit larger capacities.
All Stainless Steel Internal Components — Hardened
valves and seats. Extra long life and dependable service.
Resists water hammer. Protects against erosion and
corrosion.
Balanced Pressure Thermostatic Element — allows
venting of non-condensibles while operating at design
pressure.
Rugged Welded Stainless Steel Element — Increases
service life.
Wide Selection of Differential Pressures — Sizes 3/4" to
2" available with 15, 30, 75 and 125 psig differential
pressures.
Air Line Water Removal — Special configuration FTNA
optimized for compressed air service.
Repairable In-line — Can be serviced without disturbing
system piping.
MODELS
●
FTN-15–Steam pressures to 15 PSIG
●FTN-30–Steam pressures to 30 PSIG
●FTN-75–Steam pressures to 75 PSIG
●FTN-125–Steam pressures to 125 PSIG
●FTNA-75–Air pressures to 75 PSIG
●FTNA-125–Air pressures to 125 PSIG
A
PPLICATIONS
●
Unit Heaters & other Space Heating Equipment
●Heat Exchangers/Reboilers
●Steam Heating Coils
●Steam Main Drips
●Air Compressor Receivers
●Air Line Drips
●Air Powered Process Equipment
OPTIONS
●
Repair Kits
See page 329
OPERA TION
Installation Tip: Always install STV Test & Block Valve as part of trap station
SEE PAGE 354
Installation Tip: Add Uniflex Pipe Coupling for ease of maintenance
SEE PAGE 374
Connections: 3/4"-2" NPT
Maximum Capacity—lbs/hr (10°F Below Saturation)
Size Differential–PSIG (barg)
Trap NPT Orifice 1/4 1/2 1 2 5 10 15 20 25 30 40 50 75 100 125
(in.) (.017) (.034) (.069) (.138) (.345) (.690) (1.03) (1.38) (1.72) (2.07) (2.76) (3.45) (5.17) (6.90) (8.62)
FTN-15 3/4" .218 279 369 489 650 785 1000 1075
FTN-15 1" .218 279 369 489 650 785 1000 1075
FTN-15 1 1/4" .312 600 770 980 1240 1640 2000 2340
FTN-15 1 1/2" .500 1100 1700 2400 3300 5000 6600 7600
FTN-15 2" .625 2300 2800 3600 4650 6900 9000 10900
FTN-30 3/4" .218 279 369 489 650 785 1000 1075 1210 1300 1370
FTN-30 1" .218 279 369 489 650 785 1000 1075 1210 1300 1370
FTN-30 1 1/4" .228 375 500 690 910 1200 1500 1680 1800 1900 2000
FTN-30 1 1/2" .390 1000 1300 1700 2300 3400 4600 5500 6000 6600 7000
FTN-30 2" .500 1300 1800 2500 3400 5200 6800 7800 8600 9300 10000
FTN-75
†
3/4" .166 160 213 280 365 520 700 795 875 930 970 1120 1230 1450
FTN-75†1" .166 160 213 280 365 520 700 795 875 930 970 1120 1230 1450
FTN-75
†
1 1/4" .312 550 725 960 1300 1900 2650 3050 3400 3700 4000 4400 4750 5400
FTN-75
†
1 1/2" .312 550 725 960 1300 1900 2650 3050 3400 3700 4000 4400 4750 5400
FTN-75†2” .421 850 1100 1500 2000 3100 4150 4750 5200 5500 5800 6400 6800 7700
FTN-125
†
3/4" .125 100 135 175 230 330 415 500 585 620 685 750 830 970 1110 1190
FTN-125
†
1" .125 100 135 175 230 330 415 500 585 620 685 750 830 970 1110 1190
FTN-125†1 1/4" .246 400 520 680 890 1300 1700 2050 2300 2500 2700 3000 3200 3800 4200 4500
FTN-125
†
1 1/2" .246 400 520 680 890 1300 1700 2050 2300 2500 2700 3000 3200 3800 4200 4500
FTN-125
†
2" .332 550 675 880 1225 1950 2600 3000 3250 3500 3800 4200 4600 5500 6100 6600
Steam trap shall be of float and thermostatic design. Float shall
actuate the valve via a hinged lever and linkage. Air vent shall be of
balanced pressure design with stainless steel welded encapsulated
bellows capable of discharging air and noncondensable gases
continuously within 15°F of saturated temperature. Traps through 11/4" shall employ “H” pattern connections to accommodate multiple
piping configurations. Trap shall be cast iron bodied suitable for
pressures to 125 psi and available in 3/4" through 2" NPT.
FTN SERIES
FLOAT & THERMOSTATIC
STEAM TRAPS
SPECIFICATION
MAXIMUM OPERATING CONDITIONS
PMO: Max. Operating Pressure
ORIFICE PMO
15 15 psig (1.03 barg)
30 30 psig (2.07 barg)
75 75 psig (5.17 barg)
125 125 psig (8.62 barg)
PMA: Max. Allowable Pressure
250 psig (17.2 barg)
TMA: Max. Allowable Temperature
450°F (232°C)
3
/
4", 1" - All
1
1
/
4" - FTN-15,
FTN-30
1
1
/2", 2" - All *
11/4" - FTN-75,
FTN-125,
FTNA-75*,
FTNA-125*
M
ATERIALS OF
CONSTRUCTION
Body & Cover . .Cast Iron ASTMA126B
All Internal . . . . . . . . . .Stainless Steel
Air Vent (
FTN only
) . . . .Balanced Pressure,
Welded Stainless Steel
Dimensions
Inches (mm)
Weight
Model No. Size
A B C D E E1 lbs (kg)
3
/4 6.25 5.50 3.31 3.00 5.75 — 9
(159) (140) (84) (76) (146) (4.1)
1 6.25 5.50 3.31 3.00 5.75 — 9
(159) (140) (84) (76) (146) (4.1)
FTN-15, FTN-30 11/4 6.25 5.75 3.00 3.81 5.75 — 91/2
(159) (146) (76) (97) (146) (4.3)
11/
2 8.50 4.25 3.00 0.70 — 8.40 18
(216) (108) (76) (18) (213) (8.2)
2 9.81 4.94 4.94 0.12 9.12 — 26
(249) (123) (123) (3) (232) (11.8)
3
/
4 6.25 5.50 3.31 3.00 5.75 9
(159) (140) (84) (76) (146) (4.1)
1 6.25 5.50 3.31 3.00 5.75 — 9
(159) (140) (84) (76) (146) (4.1)
FTN-75, FTN-125 11/
4 8.50 4.25 3.00 0.70 — 8.40 18
FTNA-75,FTNA-125 (216) (108) (76) (18) (213) (8.2)
11/
2 8.50 4.25 3.00 0.70 — 8.40 18
(216) (108) (76) (18) (213) (8.2)
2 9.81 4.94 4.94 0.12 9.12 — 26
(249) (123) (123) (3) (232) (11.8)
For Kg/Hr Multiply by .454For Kg/Hr Multiply by .454 †For FTNA capacities, multiply by 1.33.
*1/8" NPT tap at top boss for balancing line.
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FTN FLOAT &
THERMOSTATIC TRAP
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