Steam traps
Ball float
A
Steam
saturation
curve
C
B
5.5.59
0.5
1 2 3 4.5
7 10
1 080
1200 1240 1340 1400
2 000 2 600
Pressure / temperature limits (ISO 6552)
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Pressure bar g
Body design conditions
PN16
16 bar g @ 120 °C
220 °C @ 12.1 bar g
0 °C
limited to DPMX
220 °C @ 12.1 bar g
0 °C
4.5 bar
10 bar
13 bar
24 bar g
PMA
Maximum allowable pressure
TMA
Maximum allowable temperature
Minimum allowable temperature
PMO
Maximum operating pressure for saturated steam service
TMO
Maximum operating temperature
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
DPMX
Maximum different pressure
Designed for a maximum cold hydraulic test pressure of
Capacities - DN80 and DN100
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Differential pressure bar (x 100 = kPa)
Dimensions / weights (approximate) in mm and kg
FT43-4.5
FT43-10
FT43-14
Additonal cold water capacities from the thermostatic air
vent under start-up conditions
Capacities shown above are based on condensate at satutation
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.
Dp (bar)
Size
DN80
DN100
13
Minimum additonal cold water capacity (kg/h)
3200
Size
DN80
DN100
PN16
JIS/KS 10
ASME
A
A
A
B
C
D
E
F
Weight
350
352
350
343
140
350
350
140
123
387
200
123
387
200
D
310
72
310
74
Withdrawal distance
B
C
A
D
E
F
Page 2 of 3
TI-S02-22 ST Issue 9
FT43 Cast Iron Ball Float Steam Traps DN80 and DN100
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