Datasheet

Model Selection
Condition & Description
of improvement
Contributing factor Countermeasure
Fluctuation in vacuum
pressure
Occurrence of abnormal
noise (intermittent noise)
from exhaust of vacuum
ejector
Fluctuation in supply pressure Reconsider compressed air circuit (line).
(Addition of a tank, etc.)
Vacuum pressure may fluctuate
under certain conditions due to
ejector characteristics.
Lower or raise supply pressure a little at a time, and use in a supply
pressure range where vacuum pressure does not fluctuate.
Intermittent noise may occur
under certain conditions due to
ejector characteristics.
Lower or raise supply pressure a little at a time, and use in a supply
pressure range where the intermittent noise does not occur.
Air leakage from vacuum
port of manifold type
vacuum ejector
Exhaust air from the ejector enters
the vacuum port of another ejector
that is stopped.
Use a vacuum ejector with a check valve.
(Please contact SMC for the part no. of an ejector with a check
valve.)
Adsorption problem
over time
(Adsorption was
normal during trial
operation.)
Clogging of suction filter Replace filters.
Improve installation environment.
Workpiece is not
released.
Inadequate release flow rate Open release flow adjustment needle.
Viscosity increase due to vacuum
pad (rubber) wear
Replace vacuum pads.
Confirm compatibility of vacuum pad material and workpiece.
Vacuum pressure is too high. Set vacuum pressure to minimum necessary value.
Effects due to static electricity Use a conductive pad.
Clogging of sound absorbing
material
Replace sound absorbing materials.
Add a filter to supply (compressed) air circuit.
Install an additional suction filter.
Clogging of nozzle or diffuser Remove foreign objects.
Add a filter to supply (compressed) air circuit.
Install an additional suction filter.
Vacuum pad (rubber)
deterioration, cracking, etc.
Replace vacuum pads.
Confirm compatibility of vacuum pad material and workpiece.
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