Product Handbook 2026 - Volume 1

Flowmetering Gilflo and ILVA flowmeters 3

Pressure/temperature limits

Pressure psi g

0

145

290

435

580

752

A

B

C

450 400 300 200 100 0

842 752 572 392 212 32

Steam saturation curve

C B

A

0

10

20

30

40

50

Pressure bar g

The product must not be used in this region.

A - A Flanged ASME 300 DN50-DN300 B - B Flanged ASME 300 DN400 C - C Flanged EN 1092 PN40

3.2 32

Body design conditions

ASME 300

PMA Maximum allowable pressure

51.1 bar g @ 38 °C

741 psi g @ 100 °F

TMA Maximum allowable temperature

450 °C @ 23 bar g

842 °F @ 334 psi g

Minimum allowable temperature

0°C

32 °F

ASME 51.1 bar g @ 38 °C

741 psi g @ 100 °F

PMO Maximum operating pressure

DN400

49 bar g @ 65.7 °C 711 psi g @ 150 °F

Minimum operating pressure

0.6 bar g

9 psi g

TMO Maximum operating temperature

450 °C @ 23 bar g

842 °F @ 334 psi g

Minimum operating temperature Note : For lower operating temperatures consult Spirax Sarco.

0°C

32 °F

Maximum viscosity

30 centipoise

D PMX Maximum differential pressure

349 m bar

ASME

77 bar g

1117 psi g

Designed for a maximum cold hydraulic test pressure of:

PN40

60 bar g

870 psi g

TI-P337-08 EMM Issue 9

Page 2 of 7

Gilflo 'B' Flowmeter Pipeline Unit

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