Dwyer Series TDST User manual

Brand: Dwyer

Model: Series TDST

Type: User 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: info@dwyermail.com

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

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˝

3˝ (76.2MM)

3-1/4˝ (82.5MM)

2-3/8˝ (60.3MM)

2-1/2˝ (63.5MM)

1-7/8˝ (47.6MM)

2-1/8˝ (53.9MM)

-11/16˝ (42.84MM)

SIZE

3/8˝

1/2˝

3/4˝

1˝

2˝ (50.8MM)

2-11/16˝ (76.2MM)

2-13/16˝ (71.4MM)

3-5/16˝ (84.1MM)

1-3/4˝ (44.5MM)

2-5/19˝ (58.7MM)

2-1/2˝ (63.5MM)

1-3/4˝ (44.5MM)

2˝ (50.8MM)

2-7/16˝ (61.9MM)

2-7/8˝ (73.0MM)

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: info@dwyermail.com

NPT

Connection

/8˝

1/2˝

3/4˝

Capacity Chart

TDST-SSSD Maximum Capacity - lbs/hr 10°F Below Saturation

Differential Pressure psig (bar)

3.5

(0.24)

180

300

405

640

(0.34)

185

310

420

670

(0.7)

190

345

470

725

(1.4)

200

410

560

865

(2.1)

215

465

640

980

(3.4)

245

575

810

120

(5.2)

305

700

1000

147

100

(6.9)

370

810

1160

175

150

(10.3)

500

1000

1450

2200

200

(13.8)

610

1140

1670

2600

300

(20.7)

790

1410

2100

3250

400

(27.6)

960

1630

2430

3780

500

(34.5)

1100

1830

2750

4250

600

(41.3)

1250

2000

3050

4700

TDST-SSST Maximum Capacity - lbs/hr 10°F Below Saturation

NPT

Connection

3/8˝

1/2˝

3/4˝

1˝

(0.7)

315

650

(1.4)

370

740

(2.1)

425

800

(3.4)

520

1000

(5.2)

575

1100

100

(6.9)

800

1400

150

(10.3)

900

1540

200

(13.8)

1080

1630

300

(20.7)

1280

1760

400

(27.6)

1380

1930

500

(34.5)

1480

2070

600

(41.4)

1650

2200

ifferential Pressure psig (bar)

3/8˝

65-75

(88-102)

105-115

(142-156)

Trap Size

TDST-

SSSD

TDST-SSST

1/2˝

85-95

(115-129)

105-115

(142-156)

3/4˝

105-115

(142-156)

105-115

(142-156)

1˝

120-130

(163-176)

105-115

(142-156)

Torque Values for Cover ft-lb (N-m)

MAINTENANCE

When using the SSSD models it is strongly recommended

to blow-off accumulation in the strainer a day or two after

the system has been installed. A periodic blow-off or

cleaning of the strainer should be instituted.

If trap fails, close isolation valves and remove cap using a

suitable spanner. Dirt or sediment on the disc or body

seating will cause abnormal operation. To clean these

parts use a soft cloth and solvent. DO NOT WIRE BRUSH

OR USE ANY ROUGH IMPLEMENT. Reassemble the

unit with the groove in the disc facing down. Apply

antiseize compound on the cap threads. Avoid getting

compound on the disc or body seating surfaces. See the

torque table to the right for recommended torque values.

For the SSST option a peroidic cleaning of the strainer

should be instituted. Unscrew the strainer plug using a

suitable spanner, withdraw the screen and clean it or

replace it if damaged. To reassemble, reverse the

procedure. A periodic check of system calibration is

recommended. The Series TDST is not field serviceable

and should be returned if repair is needed (field repair

should not be attempted and may void warranty). Be sure

to include a brief description of the problem plus any

relevant application notes. Contact customer service to

receive a return goods authorization number before

shipping.

Dwyer Series TDST User manual

Dwyer Series TDST User manual

Dwyer Series TDST User manual

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