44
Control systems Pressure reducing/surplussing valves
Pressure/temperature limits
A
B
C
Steam saturation curve
E
D
Pressure bar g
The product must not be used in this region.
A - C-D Flanged EN 1092 PN40 and ASME 300 A-B-E Flanged PN16
Note: In the case of liquid service, this product is to be used only on intermittant duty. Applications such as continuous pump recirculation may cause valve and pipework damage due to cavitation which is not covered under the terms of our warranty. Body design conditions PN40 Maximum design pressure 40 bar g @ 50 °C Maximum design temperature 300 °C @ 25.8 bar g Minimum design temperature 0 °C
4.6 78
EPDM diaphragm
125 °C
Maximum operating temperature
Nitrile diaphragm
90 °C
Minimum operating temperature (ambient) Note: For lower operating temperatures consult Spirax Sarco
0 °C
DN15 - DN50
25 bar
Maximum differential pressure
DN65 - DN100
20 bar
Designed for a maximum cold hydraulic test pressure of:
60 bar g
Note: With internals fitted, test pressure must not exceed:
40 bar g
TI-P206-01 CTLS Issue 13
Page 2 of 13
DEP4 Cast Steel Excess Pressure Valve
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