5 Installation at Site
38 of 124
Amarex KRT
5.3.2.3.2 Auxiliary connections
WARNING
Screw plugs subjected to pressure
Risk of injuries by parts flying off and escaping fluid!
▷ Never use screw plugs for releasing pressure from the pump casing.
▷ Always use a suitable venting device (e.g. vent valve).
Fig.26: Auxiliary connections
Table24: Overview of auxiliary connections
Connection Description Thread
1M.2 Pressure gage G1/2
6D Vent G1 1/4
11)
3M Pressure/vacuum gage G1/2
6B Casing drain G1
5.3.2.3.3 Vacuum balance line
NOTE
Where fluid has to be pumped out of a vessel under vacuum, installing a vacuum
balance line is recommended.
The following rules apply to vacuum balance lines:
▪ Minimum nominal line diameter: 0.98 inch [25 mm].
▪ The line extends above the highest permissible fluid level in the tank.
▪ The shut-off element in the vacuum balance line always stays open during pump
operation; it is only closed when the pump is shut down.
11) For sizes 500-632, 500-634, 500-640: G1 1/2
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