BOC Edwards EXT555H, Инструкция по эксплуатации

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Jun 01 Issue A
EXT555H
TECHNIC
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L
D
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5
5
2.4 Purge gas specification
Purge gas system items Reference data
Purge gas Dry nitrogen, argon or other inert gases
Maximum dew point at atmospheric pressure -22 °C
Maximum size of particulates 1 micron
Maximum concentration of oil 0.1 parts per million
Allowable purge gas flow (when required) 20 to 150 sccm (0.33 to 2.48 mbar l s-1, 33 to 248
Pa l s-1)
Recommended purge gas flow 25 sccm (0.42 mbar l s-1, 42 Pa l s-1)
Maximum allowable purge gas supply pressure 2 bar gauge (29 psig, 3 x 10
5
Pa)
Table 3 - Purge gas specification
2.5 Water cooling
The following water cooling specification
corresponds to a typical high quality drinking water
specification. Check with your water supply
authority if you are in doubt about the quality of
your supply.
Cooling water system items Reference data
Quality Mechanically clean and optically with no deposits
or turbidity
pH value 6.0 to 8.0
Maximum calcium carbonate concentration 75 parts per million
Maximum chloride concentration 100 parts per million
Minimum oxygen concentration 4 parts per million
Recommended water cooling flow rate (at 15 °C) 15 l hr
-1
Water temperature See Table 5
Maximum water pressure 5 bar (gauge), 73.5 psig, 6 x 10
5
Pa
Materials exposed to cooling water Copper, brass, braise
Table 4 - Cooling water specification