Fig.9: Vacuum balance system
1 Vessel under vacuum 2 Vacuum balance line
3 Shut-off element 4 Swing check valve
5 Main shut-off element 6 Vacuum-tight shut-off element
NOTE
An additional line fitted with a shut-off valve (from the pump discharge nozzle to
the balance line) facilitates venting of the pump before start-up.
5.5 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 suitable venting devices (e.g. vent valve).
The following auxiliary connections are available:
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