Steam traps Thermodynamic
8
Pressure/temperature limits (ISO 6552) Please note: For low temperature applications down to -46 °C use the TD42S3 (ASTM A350 LF2) - See TI-P068-23 for further information.
Steam saturation curve
Pressure bar g
The product must not be used in this region. The product should not be used in this region.
Note: Upon prolonged exposure to temperatures above 425 °C, the carbide phase of steel may be converted to graphite. Permissible but not recommended for prolonged use above 425 °C. Body design conditions ANSI/ASME 300 PMA Maximum allowable pressure 51 bar g @ 38 °C TMA Maximum allowable temperature 427 °C @ 28 bar g Minimum allowable temperature 0 °C PMO Maximum operating pressure for saturated steam service 42 bar g TMO Maximum operating temperature 400 °C @ 34 bar g Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco 0 °C PMX Maximum differential pressure 42 bar PMOB Maximum operating backpressure should not exceed 80% of the inlet pressure. Minimum inlet pressure for satisfactory operation 0.25 bar g
5.7.34
Product is safe for use under full vacuum conditions Designed for a maximum cold hydraulic test pressure of:
76 bar g
8.7 47
Capacities When sizing the TD42S2 it is important to ensure that the correct model is selected. This will ensure the required operation and maximum life. For mains drainage and tracing applications the LC version should be selected irrespective of pipe size.
2 500 2 000
1 000
500 400 300
1"
½ " ¾ "
200
100 70
½ "LC, ¾ "LC, 1"LC
10
0.25 0.5 1
20 30 42
2 3 4 5
Differential pressure bar (x 100 = kPa)
TI-P068-07 CMGT Issue 13
Page 3 of 5
TD42S2 Thermodynamic Steam Trap
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