Boiler house
Bottom blowdown systems
BBV43
Pressure / temperature limits - EN 1092
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A
D
C
B
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The product must not be used in this region.
An extended cover is required for use in this region.
High temperature packing required for use in this region.
Notes:
1. Where the process fluid temperature is sub-zero and the ambient temperature is below +5 °C, the external moving parts of the valve
and actuator must be heat traced to maintain normal operation.
2. When selecting a valve with a bellows scaled bonnet, the pressure / temperature limits of the bellows must be read in conjunction with
the valve pressure / temperature limits shown in table below.
D
Steam
saturation
curve
D
C
B
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Pressure bar g
A-B-B
PN100
A-C-C
PN63
A-D-D
PN40
Body design conditions
PMA Maximum allowable pressure
and
PMO Maximum operating pressure
TMA Maximum allowable temperature
Minimum allowable temperature
TMO Maximum operating temperature
Minimum operating temperature
Standard packing PTFE chevron (P)
High temperature packing (H)
PN100
100 bar g @ 50 °C
400°C@59.5barg
-29 °C
250 °C @ 76.1 bar g
400°C@59.5barg
-29 °C
156 bar g
PN63
63 bar g @ 50 °C
400 °C @ 37.5 bar g
-29 °C
250°C@48.0barg
400 °C @ 37.5 bar g
-29 °C
94.5 bar g
PN40
40 bar g @ 50 °C
400°C@23.8barg
-29 °C
250°C@30.4barg
400°C@23.8barg
-10 °C
60 bar g
Page 5 of 17
Design for a maximum cold hydraulic test pressure of:
Body design conditions
PMA Maximum allowable pressure
and
PMO Maximum operating pressure
TMA Maximum allowable temperature
Minimum allowable temperature
TMO Maximum operating temperature
Minimum operating temperature
Standard packing PTFE chevron (P)
High temperature packing (H)
Design for a maximum cold hydraulic test pressure of:
Body design conditions
PMA Maximum allowable pressure
and
PMO Maximum operating pressure
TMA Maximum allowable temperature
Minimum allowable temperature
TMO Maximum operating temperature
Minimum operating temperature
Standard packing PTFE chevron (P)
High temperature packing (H)
Design for a maximum cold hydraulic test pressure of:
TI-P405-51 AB Issue 1
BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN65
2.11.6
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