Reduced vacuum performance, increased wear, and potential pump failure. Always match oil to pump type.
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Welch vacuum pump oils are precision-formulated for maximum pump efficiency and longevity. Our Gold Oil is a synthetic hydrocarbon blend ideal for corrosive gases and high-vacuum systems, offering extended service intervals. Premium Oil supports direct-drive pumps with superior thermal stability and low vapor pressure. Labovac Oil, a high-purity mineral oil, is designed for single and two-stage rotary vane pumps.
Discover all the Welch oils and choose the one that suits you best.
Gold Oil
Gold Oil 1L
Perfect for quick service or small systems, Gold Oil keeps your pump clean, stable, and corrosion-resistant.
Gold Oil 1 Gal.
Ideal for routine maintenance, Gold Oil extends pump life and resists varnishing in harsh chemical environments.
Gold Oil 5 Gal.
Best for high-volume users, Gold Oil delivers long-term protection and deep vacuum performance.
Premium Oil
Premium Oil 1L.
Premium Oil resists breakdown at high RPMs and keeps direct-drive pumps running clean.
Premium Oil 1 Gal.
Ideal for routine maintenance, Premium Oil delivers stable vacuum performance and protects against sludge and varnish.
Premium Oil 5 Gal.
Best for frequent use, Premium Oil offers long-term reliability and thermal stability in demanding direct-drive systems.
DuoSeal Oil
DuoSeal Oil 1L.
DuoSeal Oil maintains stable vacuum levels with precision-tested consistency.
DuoSeal Oil 1 Gal.
Reliable choice for regular maintenance, DuoSeal Oil delivers ideal viscosity and low vapor pressure for belt-driven pumps.
DuoSeal Oil 5 Gal.
For high-use systems, DuoSeal Oil ensures long-term vacuum performance with unmatched purity and consistency.