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NTD600 SERIES
THERMO-ACTIVE TRAP
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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
Incoming air and condensate flow through the
trap body and into the control chamber. Line
pressure raises the disc off the seat allowing
complete discharge. When flashing condensate
enters the cartridge, flow velocity increases,
creating low pressure underneath the disc.
Flashing condensate at high velocity strikes the
inside wall of the disc chamber and is deflected
to the top of the disc causing a pressure buildup. The disc
is forced down onto the seat by this pressure imbalance.
The trap remains closed as flashed vapor in the control
chamber keeps the disc seated. Pressure inside the cap is
not lowered until the trapped flash vapor condenses due to
body radiation. Condensing steam lowers the pressure
above the disc. Disc is then lifted and the cycle repeated.
NTD600 SERIES
THERMODYNAMIC
STEAM TRAPS
Pressures To 600 PSIG (41.3 barg)
Temperatures to 800°F (426°C)
Compact Design — Hardened stainless steel disc is the
only moving part.
Inexpensive — Low initial cost is less expensive than
repairable technologies.
Simplifies Installation — Works in any position.
Rugged — Handles water hammer and superheat.
Reliable, Efficient Operation — Blast discharge helps to
eliminate dirt buildup and provides tight shutoff
Freeze resistant — Self draining design prevents freezing.
All Stainless Steel Construction — Resists both internal
and external corrosion.
Easy to Monitor — Audible discharge cycle makes
checking operation simple.
MODELS
●
NTD600–Thermodynamic Disc Trap
●NTD600S–NTD600 with integral strainer
●NTD600B–NTD600S with blowdown valve
APPLICA TIONS
●
Steam Tracing
●Drips
●Heating
NTD600 Model Only:
Canadian Registration # OE0591.9C
OPERA TION
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Connections: 3⁄8" – 1" NPT
Steam trap shall be of thermodynamic design. Body shall be of all
stainless construction and hardened throughout. Seat shall be
integral to body. Cover shall seal to body without gaskets or seals.
Trap shall be suitable for pressures through 600 psi and available in
3/8" through 1".
MAXIMUM OPERATING
CONDITIONS
PMO: Max. Operating Pressure 600 psig (41.3 barg)
TMO: Max. Operating Temperature 800°F (426°C)
PMA: Max. Allowable Pressure 600 psig (41.3 barg)
TMA: Max. Allowable Temperature 800°F (426°F)
MATERIALS OF CONSTRUCTION
Body ……………………………420F SS ASTM A743 CA40F
Cap & Disc ………………………………416 SS ASTM A582
Blow Down Valve …………………………………304/316SS
Screen …………………………………………Stainless Steel
NTD600 SERIES
THERMODYNAMIC
STEAM TRAPS
SPECIFICATION
C
B
A
Maximum Capacity—lbs/hr 10°F Below Saturation
Differential PSIG (barg)
NPT
3.5 5 10 20 30 50 75 100 150 200 300 400 500 600
Connection
(0.24) (0.34) (0.7) (1.4) (2.1) (3.4) (5.2) (6.9) (10.3) (13.8) (20.7) (27.6) (34.5) (41.3)
3/8" 180 185 190 200 215 245 305 370 500 610 790 960 1100 1250
1/2" 300 310 345 410 465 575 700 810 1000 1140 1410 1630 1830 2000
3/4" 405 420 470 560 640 810 1000 1160 1450 1670 2100 2430 2750 3050
1" 640 670 725 865 980 1200 1470 1750 2200 2600 3250 3780 4250 4700
Dimensions in inches (mm)
Weight
in Lbs.
(kg)
Size A B C
3
/8"21
3
/4 13/4 .8
(51) (44) (44) (.36)
1
/2"211/16 13/4 2 1.2
(68) (44) (51) (.55)
3
/4" 213/16 25/16 27/16 1.85
(71) (59) (62) (.86)
1" 35/16 21/2 27/8 3.1
(84) (64) (73) (1.8)
For Kg/Hr Multiply by .454
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NTD600 SERIES
THERMO-ACTIVE TRAP
NOTE: The NTD600 Series works efficiently at all line pressures between 5+600 psi and back pressures up to 80% of line pressures.
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