Leybold Oils & Lubricants –
Genuine LEYBONOL™ from Ehrler & Beck

Ester oils offer exceptionally high thermal stability and extremely low vapour pressure values. As a result
they prevent backstreaming into high-vacuum stages, dissolve deposits and keep the pump interior clean.
They are the first choice for screw backing pumps with exhaust temperatures above 90 °C, processes
with aggressive solvents (MEK, acetone, ethyl acetate) and as backing pump oil for turbomolecular pumps.

Mineral oils are the cost-efficient all-rounders among Leybold lubricants. They provide
reliable lubrication for rotary vane, piston and Roots pumps at temperatures up to 90 °C,
are easy to analyse and are ideal for hospital suction systems, pilot plants
and laboratory freeze dryers when a low cost per litre (€/litre) and OEM warranty security are the priority.

Selection matrix: LVO 38/48/100 (low viscosity) for cold environments; LVO 130/150 for
larger clearances. Zinc-free “Vacuum Vane Fluids” extend the service life of vanes and cams
in continuous operation.

PAO oils (polyalphaolefins) combine the molecular purity of a fully synthetic base with
low vapour pressure, high oxidation resistance and excellent shear stability.
They are perfectly suited to temperature-controlled cleanrooms (< 25 °C), installations with long
oil change intervals and applications in food and pharmaceutical packaging,
where NSF H1 approvals are required. Thanks to their very low pour point, they remain free-flowing
even at sub-zero temperatures and prevent varnish formation inside the pump.

Performance characteristics: oxidation induction > 10 000 h, shear stability < 5 % viscosity loss
(ASTM D3945), pour point −50 °C, flash point > 260 °C.

PFPE oils are special, fully fluorinated lubricants that are non-flammable even in pure oxygen and have an almost unmeasurable vapour pressure of less than 1 × 10−10 mbar at 200 ° C.

Owing to their complete chemical inertness, they are preferred for particularly corrosive or high-purity processes in which conventional mineral, ester or PAO oils are not suitable.

Contamination with different types of oil is

Once the pump has been filled with the fluid, it should be operated with PFPE on a permanent basis.

An oil service is recommended every 12 000 hours, with an interim analysis (FT-IR, TAN, metal wear test) after 4 000 hours to check the chemical properties of the oil.

Typical uses: O₂ compressors, plasma etching processes, isotope handling and other

corrosive gas flows (Cl₂, SF₆). Oil change up to 12 000 h with interim analysis.

Silicone and diffusion pump oils are based on high-purity phenyl/dimethyl siloxanes
and are characterised by an extremely low vapour pressure (< 1 × 10⁻⁹ mbar)
and exceptional thermal stability. They are used in
diffusion and oil vapour jet pumps (DIP/DIJ) to
reach ultimate pressures down to the 10⁻⁷ mbar range
and hold them constant. The fluids resist cracking products,
do not oxidise and considerably extend the overhaul intervals of your
high-vacuum pumps.

Typical uses: diffusion and oil vapour jet pumps (DIP/DIJ),
LEYBOJET vapour jet pumps, high-pressure Roots boosters as an oil immersion seal.
Experience shows that change intervals are 12 000 h +, provided that
regular checks for silicon degradation products are carried out.

Special synthetic oils cover highly specialised applications in which standard mineral,
ester or PAO oils reach their limits. These include extremely high or low
operating temperatures, aggressive process gases, vacuum-tight gearboxes or bearing points
and food- or pharma-grade environments with strict approvals.
The formulations are based on selected polyol esters, complex hydrocarbons
or functionalised additive packages that are specifically tailored to wear protection, oxidation stability
and seal compatibility.

Typical applications: high-temperature Roots boosters, vacuum-tight gearboxes,
filling oil for bearings running at extreme speeds, pumps in food or pharmaceutical processes
(NSF-H1), as well as special sealing or hydraulic systems with extended
temperature and pressure requirements.