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Emerson Process Management GmbH & Co. OHG 4-5
4
Maintenance
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
03/2012
Fig. 4-1: Leak Testing with U-tube Manometer (Flame arrestor)
Analyzer
overpressure approx.
0.725 psi/50 mbar
stop
valve
Water
ame
arrestors
4.1.1.3.2 Pressure Drop Test
To measure the pressure drop at a ame
arrestor
• disconnect internal and external gas lines
• connect a ow meter in series to the ame
arrestor
• connect an air or nitrogen supply to the
ow meter
• connect a manometer in a way to measu-
re the pressure at the ame arrestor inlet
against the outlet
• adjust the ow to 1 l/min and compare the
resulting pressure drop to the following
reference value: (5.1 ± 1) hPa.
Replace the ame arrestor if the measured
pressure value differs more than 10 % from
the reference value given above.
Fig. 4-2: Pressure Drop Test
Q = 1 l/min
ame
arrestor
ow meter
manometer
4.1 Verications and Tests