44
Control systems Pressure reducing/surplussing valves
Pressure/temperature limits
B C
D
A
Steam saturation curve
F
G
E
Pressure bar g
The product must not be used in this region.
A-D-E Flanged EN 1092 PN25 A-C-G Flanged EN 1092 PN16 A-B-F Flanged ASME 150
Note: In the case of liquid service, this product is to be used only on intermittent 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
PN25
Maximum design pressure
25 bar g @ 100 °C
Maximum design temperature
300 °C @ 17.5 bar g
4.6 66
Minimum design temperature
0 °C
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:
38 bar g
Note: With internals fitted, test pressure must not exceed:
25 bar g
K vs values Size DN
15
20
25
32
40
50
65
80
100
K vs
3.4
6.5
11.4
16.4
24
40
58
92
145
Note: The K vs values shown above are full capacities and should be used for safety valve sizing purposes where they are required.
TI-P205-01 CTLS Issue 12
Page 2 of 11
DEP7 SG Iron Excess Pressure Valve
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