Samson 1634666, Instruction Manual, Page: 5 / 12

To be used with all safety instructions that must be followed. A failure to follow the
instructions may result in injury and/or incorrect machine operation.
1.2 Explanation of warning symbols
Pilot pressure
Air inlet
Air inlet
Adjustment
Air outlet
The SAMSON Vacuum Limiter Valve is designed to control the pressure (vacuum) level and to avoid
cavitation in the pump.
The Vacuum Limiter Valve is installed when the suction line may force the pump to operate below the
cavitation limit. Air must then be supplied to the suction side of the pump through the vacuum limiter,
which is regulated according to the required pressure.
Cavitation arises when the pressure in the pump falls to under the steam pressure for the service liquid,
which makes the liquid boiling and steam bubbles arise in the service liquid. Continuous operation will
cause great mechanical damage.
1.3 Functional description
Air outlet
DOC1634089_4
The SAMSON vacuum limiter is exclusively designed for SAMSON liquid ring pumps!
Important technical and safety instructions is showed by symbols. If instructions are not performed
correctly, it may lead to personnel injury or incorrect function of the vacuum limiter.
(Vacuum)
Vacuum limiter
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