Post on 03-Jun-2018
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Float & Thermostatic Steam Trapsfor efficient condensate drainage of industrialprocess and HVAC equipment
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Key features Key reasons Key benefits
Stainless Steel float Rugged, corrosion resistant,shock and surge resistant.
Automatically adjusts the valveopening to maintain a continuouscondensate flow. Low lifetimefailure rate.
Unaffected by back
pressure
Trap only requires differentialpressure to operate. Infinite turn down
on both pressure and flow.
Operation is regulated solely bycondensate level inside the trap,which allows the trap to drainprocess equipment effectivelyunder varying demands.
Easy to service Trap has either bolted coveror universal connection.
All internal parts can be servicedwithout disturbing the pipingconnections.
Withstands
waterhammer
and superheat
Stainless steel balanced pressurethermostatic air vent.
Withstands waterhammerand steam temperatures upto 572 F.
Stainless Steel
valve trim
Corrosion resistant,hardened valve head.
Long wear life.
No steam leakage Maximum thermal efficiency,but drains condensate assoon as it forms.
Condensate seals the valve at alltimes, preventing steam leakage.
Key features and benefits
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Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
FT14-4.51" HC,
1-1/2", 2"
Cast Iron (1"),Ductile Iron
(1-1/2" & 2")NPT In-line horizontal
SLR withair vent
TI-2-320 US 65 psig
FT14-101" HC,
1-1/2", 2"
Cast Iron (1"),Ductile Iron
(1-1/2" & 2")NPT In-line horizontal
SLR withair vent
TI-2-320 US 145 psig
FT14-141" HC,
1-1/2", 2"
Cast Iron (1"),Ductile Iron
(1-1/2" & 2")NPT In-line horizontal
SLR withair vent
TI-2-320 US 200 psig
FT14 and FT14C
The FT14 features rugged cast iron (1") or ductile iron (1-1/2" and 2") construction for pressures up to 200 psig. The conven-
ient in-line connections allow for servicing of all trap internals without removing the trap from the pipeline. The stainless steel
air vent, float, and valve eliminate air binding, resist corrosion and allow for continuous drainage of condensate.
Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
IFT14-4.5FT14-4.5C
1/2", 3/4" Ductile Iron NPT In-line horizontalSLR withair vent
TI-2-320 US 65 psig
IFT14-10FT14-10C
1/2", 3/4" Ductile Iron NPT In-line horizontalSLR withair vent
TI-2-320 US 145 psig
IFT14-14FT14-14C
1/2", 3/4" Ductile Iron NPT In-line horizontalSLR withair vent
TI-2-320 US 200 psig
IFT14 and FT14C
The IFT14 1/2" & 3/4" sizes offers a compact Float & Thermostatic steam trap with in-line flow designed for horizontal or
vertical piping. The rugged ductile iron construction is suitable for pressures up to 200 psig and capacities to 1,000 lb/hr. The
stainless steel air vent, float, and valve eliminate air binding, resist corrosion and allow for continuous drainage of condensate.
IFT-14, FT14 & FT14C Capacities
Differential Pressure, psi
Condensate, lb/h
For complete capacity data,
see TI-2-306-US.
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Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
FTB-20 2" Cast Iron NPT ParallelIntegral Vacuum Breaker
Gage GlassTI-2-315 US 20 psig
FTB-30 2" Cast Iron NPT ParallelIntegral Vacuum Breaker
Gage GlassTI-2-315 US 30 psig
FTB-50 1-1/2" Cast Iron NPT ParallelIntegral Vacuum Breaker
Gage GlassTI-2-315 US 50 psig
FTB-125 2-1/2"Cast Iron or
Cast Steel (2-1/2" only)NPT or
SW (2-1/2" only)Parallel
Integral Vacuum BreakerGage Glass
TI-2-315 USTI-2-322 US
125 psig
FTB-1752",
2-1/2"Cast Iron
NPT orSW (2-1/2" only)
ParallelIntegral Vacuum Breaker
Gage GlassTI-2-315 US 175 psig
FTB-2001-1/2" Cast Iron NPT
ParallelIntegral Vacuum Breaker
Gage Glass
TI-2-315 US200 psig
2-1/2" Cast Steel SW TI-2-322 US
FTB
The FTB range of Super Capacity Float & Thermostatic steam traps are rugged cast iron products designed to handle large
heat exchanger condensate loads to 100,000 lb/hr. The stainless steel air vent, float, and valve eliminate air binding, resist
corrosion and allow for continuous drainage of condensate.
Condensate,
lb/h
Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
FT450-4.53/4", 1",
1-1/2", 2"Cast Steel
NPT, SW,Flanged
In-line horizontalStainless SteelSpecial Order
TI-2-304 US 65 psig
FT450-103/4", 1",
1-1/2", 2"Cast Steel
NPT, SW,Flanged
In-line horizontalStainless SteelSpecial Order
TI-2-304 US 145 psig
FT450-14 3/4", 1" Cast Steel NPT, SW,Flanged
In-line horizontal Stainless SteelSpecial Order
TI-2-304 US 200 psig
FT450-21 3/4", 1" Cast SteelNPT, SW,Flanged
In-line horizontalStainless SteelSpecial Order
TI-2-304 US 300 psig
FT450-323/4", 1",
1-1/2", 2"Cast Steel
NPT, SW,Flanged
In-line horizontalStainless SteelSpecial Order
TI-2-304 US 465 psig
FT450 3", 4" Cast SteelNPT, SW,Flanged
In-line horizontalStainless SteelSpecial Order
TI-2-3041 US 465 psig
FT450
For processes that require pressures to 465 psig and/or steel construction, the FT450 offers the best
solution. The FT450 is available in sizes ranging from 3/4" to 4" and with threaded, socket weld or
flanged connections. The in-line design allows all internal parts to be serviced without removing the
trap from the pipeline. The stainless steel air vent, float, and valve eliminate air binding, resist corrosion
and allow for continuous drainage of condensate.
3/4"- 2" 3"& 4"
FTB 1-1/2" to 2-1/2" CapacitiesFor complete capacity data, see TI-2-317-US.
FT450 & FT46 CapacitiesFor complete capacity data, see TI-2-308-US and TI-2-3041 US (3" and 4").
Differential Pressure, psi
Differential Pressure, psi
Condensate,
lb/h
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Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
OK150H 1/2"Forged steel &stainless steel
NPT or SW In-line horizontal - TI-2-312 US 150 psig
OK150V 1/2"Forged steel &stainless steel
NPT or SW In-line vertical - TI-2-312 US 150 psig
OK300H 1/2"Forged steel &stainless steel
NPT or SW In-line horizontal - TI-2-312 US 300 psig
OK300V 1/2"Forged steel &stainless steel
NPT or SW In-line vertical - TI-2-312 US 300 psig
OK150-300 and UFT Series
The UFT Series of Traps is an austenitic stainless steel maintenance free sealed ball float steam trap
with an integral automatic air venting capability. The UFT is designed for differential steam pressures
up to 465 psig. When installed with a suitable pipeline connector the UFT can easily and simply be
removed without breaking into the pipeline, thus speeding up trap replacement with minimal system
downtime. Pipeline connectors are available with screwed, socket weld and flanged end connections.
Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
UFT14-4.51/2",
3/4", 1"*
Stainless steel NPT or SW*In-line horizontal
or vertical
- TI-P146-02 US 65 psig
UFT14-101/2",
3/4", 1"*Stainless steel NPT or SW*
In-line horizontalor vertical
- TI-P146-02 US 150 psig
UFT14-141/2",
3/4", 1"*Stainless steel NPT or SW*
In-line horizontalor vertical
- TI-P146-02 US 200 psig
UFT32-211/2",
3/4", 1"*Stainless steel NPT or SW*
In-line horizontalor vertical
- TI-P146-02 US 300 psig
UFT32-321/2",
3/4", 1"*Stainless steel NPT or SW*
In-line horizontalor vertical
- TI-P146-02 US 465 psig
OK150-300 and UFT Series CapacitiesFor complete capacity data,
see TI-P146-02-US.
* Connection size and connection type determined by connector type, purchased separately.
0.1 0.2 0.3 0.5 21 3 4 5 10 20 32
1.5 2.9 4.4 7.3 2914.543.5
5872.5 145
290
992
110
682
882
220
441
88
68
44
22
450
300
200
400
100
5040
30
20
10
5.4-41TFU
01-41TFU
41-41TFU 12-23TFU
23-23TFU
Pressure (psig)
Condensate
lb/hr
Condensate
kg/hr
Pressure (barg)
OK-150 and OK-300 Inlet Pressure
psig 10 25 50 150 200 300
OK150 300 420 540 800 - -
OK300 145 200 260 400 440 510
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Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
FTS14-4.51/2",3/4"
Stainless SteelNPT, socket weld,
end, tri-clampIn-line horizontal
or verticalInternal Strainer TI-P145-01 US 65 psig
FTS14-101/2",3/4"
Stainless SteelNPT, socket weld,
end, tri-clampIn-line horizontal
or verticalInternal Strainer TI-P145-01 US 145 psig
FTS14-141/2",3/4"
Stainless SteelNPT, socket weld,
end, tri-clampIn-line horizontal
or verticalInternal Strainer TI-P145-01 US 200 psig
FTS14 and FT46
The FTS14 and FT46 Float & Thermostatic steam traps are designed for clean steam and other sys-
tems requiring stainless steel construction. These traps are available with convenient in-line connec-
tions for ease of maintenance and either flanged (FT46) or threaded (FTS14) connections. The stainless
steel air vent, float, and valve eliminate air binding, resist corrosion and allow for continuous drainage
of condensate.
FTS14 CapacitiesFor complete capacity data, see TI-2-317-US.
See FT450 capacities for FT46.
Model Sizes Body Material Connections Piping Configuration Options TI# Maximum Operation Pressure
FT46-4.51/2",
3/4", 1",1-1/2", 2"
Stainless Steel Flanged In-line horizontal3/8" NPT
drain connectionTI-2-318 US 65 psig
FT46-10
1/2",
3/4", 1",1-1/2", 2" Stainless Steel Flanged In-line horizontal
3/8" NPT
drain connection TI-2-318 US 145 psig
FT46-141/2",
3/4", 1",1-1/2", 2"
Stainless Steel Flanged In-line horizontal3/8" NPT
drain connectionTI-2-318 US 200 psig
FT46-211/2",
3/4", 1",1-1/2", 2"
Stainless Steel Flanged In-line horizontal3/8" NPT
drain connectionTI-2-318 US 300 psig
Differential Pressure (psig)
lb/hr flow
Condensate kg/h
Differential pressure bar (x 100 = kPa)
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How Float and Thermostatic Traps work
On start-up, air in the system is quickly discharged through the integral thermostatic air vent (1). When condensate reaches
the trap it raises the float to open the main valve. Cool condensate is discharged through both the main valve and the
air vent (2). When the trap reaches operating temperature the air vent closes and condensate at steam temperature is
discharged continuously through the main valve. The opening of the main valve is regulated by the condensate level in the
trap so that condensate never backs up into the inlet piping.Air which accumulates in the trap during operation is periodically discharged through the thermostatic air vent.
Certain models can be supplied with a steam lock release (SLR) which provides an adjustable steam bleed (3). An SLR should
be specified whenever the piping arrangement may permit the formation of a steam pocket which can prevent condensate
from reaching the trap.
ApplicationsSteam SeparatorWet steam can damage equipment and reduce process
efficiency. A Spirax Sarco separator efficiently knocks
out condensate droplets in the steam flow. If condensate
is not drained continuously from the separator, it could be
re-entrained in the steam flow. Because of its continuous,
modulated discharge, a Spirax Sarco Float & Thermostatic
steam trap is ideal for this application.
Steam Unit HeaterIf condensate backs up into the heater, the heat output
will be reduced and corrosion could occur at the steam-
condensate interface. The steam trap must react instantly
to large variations in load. Steam unit heaters must be fitted
with a Float & Thermostatic steam trap; no other type has all
of the required performance characteristics.
1. 3.2.
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ApplicationsSteam Main DripTo remove the condensate which always forms in steam
distribution mains, a drip point must be installed at every
low point and every two or three hundred feet in horizontal
runs. An equal tee ensures that condensate flowing along the
bottom of the main will fall into the collecting leg. The Float &
Thermostatic steam traps air vent efficiently eliminates the
air which is present at start-up.
Steam Lock ReleaseWhen condensate must be lifted to the trap or when the trap
must be located some distance from the equipment, the
inlet piping may become filled with steam which prevents
condensate from reaching the trap. A steam lock release
(optional on certain Float & Thermostatic models) allows the
locked steam to be bled off to the return line. Please consult
Spirax Sarco for details.
Air Handling CoilFor accurate temperature control and prevention of freezing,
waterhammer and corrosion, the coil must be kept entirely free
of condensate and air. Because of its air handling ability, its
instantaneous response to variations in condensate load and
pressure, and its continuous operation, a Float & Thermostatic
steam trap is the only type acceptable for this application.
For critical installations, two traps, each of which can handle
the full load, should be fitted in parallel. When the condensatereturn system is not pressurized, the traps should be mounted
as far as possible directly below the coil to provide
a hydrostatic head to assist in drainage.
Stall ConditionsSufficient pressure must always be present at the steam
trap inlet to overcome any back pressure caused by a
pressurized return line or a lift after the trap. The system will
stall whenever the control valve reduces the steam space
pressure below the required amount.
If this condition is a possibility, a Spirax Sarco Pressure
Powered Pump should be installed. The Pressure Powered
Pump uses steam at full line pressure to force condensatethrough the steam trap against the back pressure.
Complete details will be found in the Spirax Sarco
Pressure Powered Pump Product Bulletin.
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Guide to selection
1. Need to know 1.The steam pressure at the trap after any pressure drop through the control valve or equipment.
2.The distance the condensate must be lifted after the trap. Rule of thumb: 2 feet of lift equals 1 psi back pressure (approx).
3.Any other possible sources of back pressure in the condensate return system. For example:
Condensate taken to a pressurized deaerator tank or flash recovery vessel.
Local back pressure due to discharge of numerous traps close together into an undersized return.
4.Quantity of condensate handled. Obtained from:
Measurement
Calculation
Manufacturers data
5.Safety Factor that is dependent upon particular application, typical examples as follows:
Steam Mains 2:1
Tracers 2:1
Non-Modulatng 2:1
Modulating over 30 psi 3:1
Modulating under 30 psi Size trap at full load and 1/2 psi differential
Rule of thumb: Use a factor of 2 on everything except Temperature Controlled Air Heater Coils and Converters, and
Siphon Applications
2. How to size The difference between the steam pressure at the trap inlet and the total back pressure, including that due to lift after the trap,
is the differential pressure. The quantity of condensate should be multiplied by the appropriate safety factor to produce the sizing
load. The trap may now be selected using the differential pressure and the sizing load.
Note:The inlet pressure to the steam trap should never exceed the Maximum Operating Pressure (PMO) of the selected trap,
regardless of differential pressure.
3. Example A steam trap is required to drain 2,000 lb/h of condensate from a Unit Heater receiving steam at
100 psig. There is a lift after the trap of 10 ft.
1.Inlet Pressure 100 psig
Lift 10 ft. = 5 psi (approx.)
2.Therefore, Differential Pressure 100 psi - 5 psi = 95 psi
3.Quantity 2,000 lb/h
Safety Factor 2:1
4.Sizing Load 4,000 lb/h
A 1-1/2 FT-125 will handle 4,120 lb/h at 95 psi differential pressure. (See page 4.)
Shell and Tube Heat ExchangerBecause the Float & Thermostatic steam trap discharges
condensate continuously, it does not cause the heat exchanger
pressure to fluctuate by cycling open and closed. The control
valve can therefore maintain a more accurate temperature.
The automatic elimination of air and other gases improves
temperature control and reduces the possibility of corrosion.
A vacuum breaker permits condensate to drain by gravity whenthe control valve calls for sub-atmospheric shell pressures.
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Regional Hub Offices
NORTHEAST
Spirax Sarco, Inc.
7760 Olentangy River Road
Suite 120
Columbus, OH 43235
Phone: (614) 436-8055
Fax: (614) 436-8479
MIDWEST
Spirax Sarco, Inc.
1500 Eisenhower Lane
Suite 600
Lisle, IL 60532
Phone: (630) 493-4525
Fax: (630) 724-9176
MID-ATLANTIC
Spirax Sarco, Inc.
4647 Saucon Creek Rd.
Suite 102
Center Valley, PA 18034
Phone: (800) 251-7676
Fax: (800) 996-3232
SOUTHWEST
Spirax Sarco, Inc.
203 Georgia Ave.
Deer Park, TX 77536
Phone: (281) 478-4002
Fax: (281) 478-4615
SOUTHEAST
Spirax Sarco, Inc.
115 Atrium Way, Suite 118
Columbia, SC 29223
Phone: (800) 883-4411
Fax: (803) 865-0459
WEST
Spirax Sarco, Inc.
1930 East Carson Street
Suite 102
Long Beach, CA 90810
Phone: (310) 549-9962
Fax: (310) 549-7909
SPIRAX SARCO
1150 NORTHPOINT
BLYTHEWOOD, SC
t:800.883
or803.714
f:803.714
www.spiraxsarco.co