In industrial operation, oil-sealed vacuum pumps are often called the “heart” of the system.
However, many users only check whether the pump is running. They overlook the hidden threats inside: moisture and dust.
Real Impact of Moisture and Dust
When the pump draws in humid air or fine dust without proper filtration, serious problems can occur:
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Oil emulsification:
Water mixes with vacuum oil and forms a milky emulsion. This destroys lubrication and sealing performance. -
Vane friction and sticking:
Contaminated oil prevents smooth vane movement. This can cause sticking or even vane breakage. -
Oxidation and corrosion:
Moisture causes electrochemical corrosion. Rotor and pump chamber surfaces begin to rust.
Precision components may suffer permanent damage.
Consequences: More Than Just Equipment Failure
If not addressed in time, the impact can be severe:
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Vacuum pressure drops:
The pump runs but cannot reach the required pressure. -
High repair costs:
Replacing rotors, vanes, and restoring the chamber is expensive.
Costs can be many times higher than routine maintenance. -
Unexpected downtime:
Every hour of stoppage means lost revenue and production delays.
ULVAC Recommended Protection Plan
To prevent corrosion and pump seizure, follow these four steps:
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Strict oil monitoring:
Check oil condition regularly.
If emulsification appears, drain and clean the pump. Replace oil immediately. -
Install protective filtration:
Add an oil mist trap or water separator at the inlet.
This blocks moisture and dust before entering the pump.
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Use Gas Ballast operation:
Run the pump in Gas Ballast mode before shutdown.
This removes residual moisture and keeps the chamber dry. -
Upgrade filtration systems:
Use high-quality oil filters, such as water-separating filters Taisei Giken
These remove fine contaminants and protect vanes and rotors.
Expert Advice
Do not let moisture turn your vacuum oil into a corrosive agent.
A proper filtration system and correct operation are the best investments to protect your equipment.
Are you experiencing unstable pressure or unusual pump noise?
Contact ULVAC technical experts today for a complete and effective solution!
