44
Control systems Pressure reducing/surplussing valves
Pressure/temperature limits
Pressure psi g
0 29 58 87 116 145 174 203 232 261 276
363
32 122 212 302 410
Steam saturation curve
Pressure bar g
The product must not be used in this region.
Body design conditions
PN25
Maximum design pressure
25 bar g @ 120 °C
(363 psi g @ 248 °F)
Maximum design temperature
210 °C @ 19 bar g
(410 °F @ 276 psi g)
Minimum allowable temperature
-10 °C
(14 °F)
Maximum operating pressure for saturated steam service
17 bar g @ 207 °C
(247 psi g @ 405 °F)
4.6 2
Maximum operating temperature
207 °C @ 17 bar g
(405 °F @ 247 psi g)
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
0 °C
(32 °F)
Maximum downstream reduced pressure
8.6 bar g
(125 psi g)
Maximum differential pressure
17 bar
(247 psi)
Maximum recommended turndown ratio
10:1 at maximum flow
Designed for a maximum cold hydraulic test pressure of:
38 bar g
(551 psi g)
Note: With internals fitted, test pressure must not exceed:
19 bar g
(276 psi g)
TI-P045-14 CTLS Issue 8
Page 2 of 6
BRV2S and BRV2B SG Iron Pressure Reducing Valve
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