Steam traps

Ball float

DN40, DN50, DN80, DN100 FT44 (formally FT20) - Cast steel GS-C25N (TI-S02-23)

DN40, DN50 FT46 - Austenitic stainless steel 1.4581 (TI-P143-01)

DN40, DN50 FT47 - SG iron GGG 40.3 (TI-P142-01)

Note: All capacities shown are for the FT44, FT46, and FT47 unless otherwise indicated.

Capacities for the DN15 - DN25 are shown overleaf

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Differential pressure bar (x 100 = kPa)

Additional cold water capacities from the thermostatic air vent under start-up conditions

Capacities shown above are based on condensate at saturation temperature. Under start-up conditions when the condensate is cold

the internal thermostatic air vent will be open and provides additional capacity to the main valve. The following table gives the minimum

additional cold water capacities from the air vent.

0.5 1 2 3 4.5 7 10 14 21

P (bar)

DN40, DN50

up to 21 bar

DN80, DN100

up to 21 bar

32 bar only

Minimum additional cold water capacity (kg/h)

32

-

1 300

-

2 600

460

680

900

1 080

1 300

1 600

1 980

2 050

2 600

90

120

350

460

600

850

900

1 020

1 200

920

1 360

1 800

2 160

2 600

3 200

2 960

4 100

5 200

180

240

700

920

1 200

1 700

1 800

2 040

2 400

32 bar only

Capacity Charts for FT44, FT46 and FT47 Ball Float Steam Traps

TI-S02-36 ST Issue 3

5.5.86

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