Boiler house

Bottom blowdown systems

A

2.11.13

Steam

saturat

curve

ion

T

BBV83

Pressure / temperature limits - ASME

Pressure psi g

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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 (+41 °F), 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.

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Pressure bar g

A-T

ASME 600

Body design conditions

PMA Maximum allowable pressure

and

PMO Maximum operating pressure

TMA Maximum allowable temperature

Minimum allowable temperature

TMO Maximum operating

Standard packing PTFE chevron (P)

103.4 bar g @ 38 °C

538 °C @ 29.8 bar g

-29 °C

250 °C @ 92.7 bar g

538 °C @ 29.8 bar g

-29 °C

156 bar g

ASME 600

1499 psi g @ 100 °F

1000 °F @ 432 psi g

-20 °F

482 °F @ 1344 psi g

1000 °F @ 432 psi g

-20 °F

2262 psi g

temperature

High temperature packing (H)

Minimum operating temperature

Design for a maximum cold hydraulic test pressure of:

Page 12 of 17

TI-P405-51 AB Issue 1

BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN65

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