Dwyer TDST - Manual

Series TDST Thermodynamic Steam Trap
Specifications - Installation and Operating Instructions
Bulletin V-10-TDST
®
Series TDST Thermodynamic Steam Traps control
steam and condensate movement to maximize removal of
latent heat from steam for efficient system operation. The
thermodynamic trap has cyclic on-off operation with a disk
that is pushed open by incoming condensate and closes
tightly when steam tries to escape. The compact design
allows the steam trap to be mounted in any position and
models available with an integral strainer remove the
need for additional apparatus. When the trap is mounted
vertically, it self-drains, making it freeze-resistant. The
trap also handles water hammer, superheat, is resistant to
internal and external corrosion, and is easy to install. A
hardened 316 SS disc is the only moving part in the trap
ensuring long service life. Audible discharge cycling
makes it simple to check steam trap operation.
INSTALLATION
1. Blow out the piping thoroughly to remove loose scale
and dirt before installing the trap. When installing the trap
use pipe dope or sealing tape sparingly when attaching
the trap to the piping.
2. Install the trap as close as possible to the equipment
being drained in a location easily accessible for
maintenance and inspection. Be certain to install with flow
in the proper direction shown on the steam trap body. For
freeze-proof operation, install the trap so flow direction is
vertical.
Note: Approved practice is to install a separate trap on
each piece of apparatus to be drained.
3. To ensure easy maintenance and service, install an
isolation valve on each side of the trap and install a
strainer ahead of the inlet connection to the trap for the
SSSD models. The strainer must always angle downward.
Note: Piping upstream and downstream of the trap should
be at least equal to or one size larger than the trap
connection.
W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
Line Size: 3/8˝, 1/2˝, 3/4˝, 1˝.
End Connection: Female NPT.
Wetted Materials: Body: 420F SS, Cap & Disc: 416 SS,
Strainer: SS.
Pressure Limit: 600 psig (41.3 bar).
Temperature Limit: 800˚F (426.67˚C).
Weight: See chart below.
Capacity: See capacity chart.
SSSD Model Weight
in Lbs. (kg)
0.8 (0.36)
1.2 (0.55)
1.85 (0.86)
3.1 (1.8)
Connection (in)
3/8
1/2
3/4
1
SSST Model Weight
in Lbs. (kg)
2.4 (1)
2.3 (1)
2.7 (1.2)
3.3 (1.5)
No Strainer
With Strainer
SIZE
3/8˝
1/2˝
3/4˝
1˝
A
3˝ (76.2MM)
3˝ (76.2MM)
3˝ (76.2MM)
3-1/4˝ (82.5MM)
B
2-3/8˝ (60.3MM)
2-3/8˝ (60.3MM)
2-3/8˝ (60.3MM)
2-1/2˝ (63.5MM)
C
1-7/8˝ (47.6MM)
1-7/8˝ (47.6MM)
1-7/8˝ (47.6MM)
2-1/8˝ (53.9MM)
D
1-11/16˝ (42.84MM)
1-11/16˝ (42.84MM)
1-11/16˝ (42.84MM)
1-11/16˝ (42.84MM)
SIZE
3/8˝
1/2˝
3/4˝
1˝
A
2˝ (50.8MM)
2-11/16˝ (76.2MM)
2-13/16˝ (71.4MM)
3-5/16˝ (84.1MM)
B
1-3/4˝ (44.5MM)
1-3/4˝ (44.5MM)
2-5/19˝ (58.7MM)
2-1/2˝ (63.5MM)
C
1-3/4˝ (44.5MM)
2˝ (50.8MM)
2-7/16˝ (61.9MM)
2-7/8˝ (73.0MM)
A
B D A
C
B
C