Fomblin® PFPE Lubricants
Fomblin® PFPE lubricants represent the best choice when aggressive chemical environments, high temperatures or wide working-temperature ranges are involved.
Fomblin® VAC fluids have been specially developed in order to combine narrow molecular weight range and controlled viscosity with an extremely low vapor pressure. Thus, they provide superior performance in high vacuum applications, especially systems exposed to aggressive gases. Solvay Specialty Polymers is able to provide these grades due to its edging technology where distillation step makes us able to design tailor-made products according customer requirements.
Fomblin® Y LVAC grades are ideal for use in vacuum pumps as sealing and working fluids especially in those systems exposed to aggressive gases.
Fomblin® Y HVAC combines narrow molecular weight range and controlled viscosity with an extremely low vapor pressure. Thus, they provide superior performance in high vacuum applications as working fluid specially for diffusion pumps.
|Fomblin® Y LVAC Grades||Fomblin® Y HVAC Grades|
|Rotary pumps: sealing & lubricant fluid||√||√||√|
|Turbomolecular pumps: lubrication||√|
|Root pumps: lubrication||√||√|
|Diffusion pumps: working fluid||√||√||√||√|
Fomblin® Y LVAC viscosity vs. temperature chart
Fomblin® Y HVAC viscosity vs. temperature chart
Fomblin® Y LVAC vapor pressure vs. temperature chart
Fomblin® Y HVAC vapor pressure vs. temperature chart
Rust Preventive formulation (LVAC RP) was studied to reduce or prevent rusting when huge amount of water vapors has to be pumped or when metal surfaces of the pump are exposed to moisture. An optimum concentration of additive in Fomblin® Y LVAC grades was studied to provide protection against rust and at the same time to guarantee the physical properties and the vacuum performance of the grade.
Anti-rust property evaluation
|Sample||Fluid||Fog Chamber Time||Corrosion Degree||Fog Chamber Time||Corrosion Degree|
|Cast iron||Y LVAC||40 mins||5||1 hour||> 5|
|Low carbon steel||Y LVAC||40 mins||4||1 hour||5|
|Cast iron||Y LVAC RP||24 hours||0||96 hours||1 – 2|
|Low carbon steel||Y LVAC RP||24 hours||0||96 hours||2|
0 – No corrosion
1 – Not more than three small spots of corrosion
2 – Small areas of corrosion covering up to 1 % of the surface
3 – Small areas of corrosion covering from 1 % to 5 % of the surface
4 – Small areas of corrosion covering from 6 % to 10 % of the surface
5 – Small areas of corrosion covering more than 10 % of the surface
Fomblin® PFPE anti-rust additivated grades maintain the same viscosity and vapor pressure behavior than not additivated ones. As the following charts show:
Fomblin® Y LVAC RP – viscosity vs. temperature chart
Fomblin® Y LVAC RP – vapor pressure vs. temperature chart
Fomblin® Y LVAC 25/6 is NSF approved with the intended use described below: