MECHANICAL & DIFFUSION PUMP OIL
DDO-20 is recommended especially for those process applications which require relatively high boiler pressure to produce high vacuum. These applications include processes such as: functional and decorative coating, optical and electronic vacuum deposition, vacuum and TV tube production, and high vacuum metallurgy.
DDO-20 is a high quality, general purpose diffusion pump fluid which is double-distilled from a straight petroleum hydrocarbon mineral oil to yield a pure, high-viscosity oil for all diffusion pump types. The various types of diffusion pumps which DDO-20 is well suited for include: fractionating, diffusion/ejector, booster and mechanical vacuum pumps.