Boiler house Blowdown vessels
2
Pressure / temperature limits
Pressure psi g
0
73
145
218 290 363 435 508
580
500 392 302 212 122 32 -20
KBV21i
Steam saturation curve
Pressure bar g
The product must not be used in this region
2.9 10
Body design conditions
PN40
PMA Maximum allowable pressure
40 bar g @ 120 °C
580 psi g @ 248 °F
TMA Maximum allowable temperature
260 °C @ 0 bar g
500 °F @ 0 psi g
Minimum allowable temperature
-29 °C
-20 °F
PMO Maximum operating pressure for saturated steam service
17.25 bar g
250 psi g
TMO Maximum operating temperature
260 °C @ 0 bar g
500 °F @ 0 psi g
Minimum operating temperature. Note: For lower operating temperatures consult Spirax Sarco PMX Maximum differential pressure is limited to the PMO Designed for a maximum cold hydraulic test pressure of :
-29 °C
-20 °F
60 bar g
870 psi g
Pressure psi g
0
145
290
435
580
740
500 392 302 212 122 32 -20
KBV40i
Steam saturation curve
Pressure bar g
The product must not be used in this region
Body design conditions
ASME 300
PMA Maximum allowable pressure
51 bar g @ 38 °C
740 psi g @ 100 °F
TMA Maximum allowable temperature
260 °C @ 0 bar g
500 °F @ 0 psi g
Minimum allowable temperature
-29 °C
-20 °F
PMO Maximum operating pressure for saturated steam service
17.25 bar g
250 psi g
TMO Maximum operating temperature
260 °C @ 0 bar g
500 °F @ 0 psi g
Minimum operating temperature. Note: For lower operating temperatures consult Spirax Sarco PMX Maximum differential pressure is limited to the PMO Designed for a maximum cold hydraulic test pressure of :
-29 °C
-20 °F
76.5 bar g
1110 psi g
TI-P405-47 EMM Issue 3
Page 2 of 7
KBV21i and KBV40i Key Operated Boiler Blowdown Valve
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