DC704 / DC705: everything you need to know

Note: Following Dow Corning's discontinuation of DC704/705, Neyco has chosen to replace Dow Corning DC704 and DC705 oils with two equivalent silicone fluids: NE-704 and NE-705

Dow Corning DC704 and DC705 are silicone-based diffusion pump fluids designed for high-vacuum applications. Used in various sectors such as research, metallurgy and electronics, these oils offer exceptional performance. This article will provide you with a comprehensive overview of the properties and benefits of these oils.

 What is Dow Corning DC704?

DC704 and DC705 are phenyl-based silicone fluids. They are chemically inert and offer excellent resistance to radiation, oxidation and explosions.

 Key properties - High flash point: they offer good heat tolerance (>210°C)

- Radiation resistance: ideal for high radiation environments.

- Oxidation resistance: can operate in oxidising conditions without degrading.

- Explosion resistance: Safe for high-risk applications.

- Chemical inertness: Low reactivity with chemicals.

- Low vapour pressure: Reduces back-diffusion (so less maintenance, thanks to less frequent oil changes).

- Rapid cycling: Allows rapid vacuuming, even after exposure to air at operating temperatures (reducing downtime).

- Low viscosity

 Why choose Dow Corning DC704 and DC705 oils? Efficiency and speed

DC704 and DC705 oils enable fast, efficient vacuuming, which is crucial in applications such as scientific research and the manufacture of industrial components (e.g. electronics).

 Versatility

Thanks to their unique properties, DC704 and DC705 oils are used in a wide variety of applications.

 Safety

Its resistance to explosions and radiation makes it a safe choice for high-risk environments. What's more, these oils have a non-hazardous chemistry, which is an advantage when it comes to safe transport.

 Conclusion

Dow Corning's DC704 is a versatile and effective solution for maintaining a high quality vacuum in a variety of industrial and research applications. Its unique properties, such as resistance to radiation and oxidation, make it an essential choice for those looking to optimise their systems.

Note: Neyco has replaced Dow Corning DC704 and DC705 with two equivalent silicone fluids: NE-704 and NE-705.