Steam traps Thermodynamic
8
Pressure/temperature limits
TD259
Steam saturation curve
Pressure bar g
TD259A
Steam saturation curve
Pressure bar g
The product must not be used in this region.
Body design conditions
PN63
PMA Maximum allowable pressure
63 bar g @ 120 °C
TD259
400 °C
TMA Maximum allowable temperature
TD259A
255 °C
Minimum allowable temperature
0 °C
PMO Maximum operating pressure for saturated steam service
42 barg
TD259
400 °C @ 42 bar g
TMO Maximum operating temperature
TD259A
255 °C @ 56 bar g
Minimum operating temperature Note : For lower operating temperatures consult Spirax Sarco.
0 °C
Minimum pressure for satisfactory operation is
0.25 bar g
PMOB Maximum operating backpressure must not exceed 80% of the upstream pressure D PMX Maximum differential pressure is limited to the PMO Designed for a maximum cold hydraulic test pressure of
8.7 8
95 bar g
Capacities - Hot water
Differential pressure bar (x 100 = kPa)
TI-P068-06 ST Issue 7
Page 2 of 3
TD259 and TD259A Thermodynamic Steam Traps
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