Boiler house

Bottom blowdown systems

BBV63

Pressure / temperature limits - ASME

Pressure psi g

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Pressure bar g

curve

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M

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.

Body design conditions

PMA Maximum allowable pressure

and

99.3barg@38°C

PMO Maximum operating pressure

ASME 600

1440 psi g @ 100 °F

1000 °F @ 725 psi g

-20 °F

482 °F @ 967 psi g

1000 °F @ 725 psi g

-20 °F

2 262 psi g

ASME 300

1440 psi g @ 100 °F

1000 °F @ 365 psi g

-20 °F

482 °F @ 484 psi g

1000 °F @ 365 psi g

-20 °F

1 087 psi g

ASME 150

275 psi g @ 100 °F

1000 °F @ 20 psi g

-20 °F

482 °F @ 175 psi g

1000 °F @ 20 psi g

-20 °F

2 262 psi g

Page 9 of 17

A-M-M

ASME 600

A-N-N

ASME 300

A-O

ASME 150

TMA Maximum allowable temperature

Minimum allowable temperature

TMO Maximum operating

Standard packing PTFE chevron (P)

538 °C @ 50 bar g

-29 °C

250 °C @ 66.8 bar g

538 °C @ 50 bar g

-29 °C

156 bar g

temperature

High temperature packing (H)

Minimum operating temperature

Design for a maximum cold hydraulic test pressure

of:

Body design conditions

PMA Maximum allowable pressure

and

49.6barg@38°C

PMO Maximum operating pressure

TMA Maximum allowable temperature

Minimum allowable temperature

TMO Maximum operating

Standard packing PTFE chevron (P)

538 °C @ 25.2 bar g

-29 °C

250 °C @ 33.4 bar g

538 °C @ 25.2 bar g

-29 °C

75 bar g

temperature

High temperature packing (H)

Minimum operating temperature

Design for a maximum cold hydraulic test pressure of:

Body design conditions

PMA Maximum allowable pressure

and

19barg@38°C

PMO Maximum operating pressure

TMA Maximum allowable temperature

Minimum allowable temperature

TMO Maximum operating

Standard packing PTFE chevron (P)

538 °C @ 1.4 bar g

-29 °C

250 °C @ 12.1 bar g

538 °C @ 1.4 bar g

-29 °C

29 bar g

temperature

High temperature packing (H)

Minimum operating temperature

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

2.11.10

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