FEP protective discs
Material: FEP (Perfluoroethylene propylene)
INFO Data sheet FEP protective screen - Chemical protectio – (237.28 KB)
FEP protective discs can be used if the sight glass plates, for example made of borosilicate glass, are exposed to strong chemical stress. At elevated pH values, such as alkalis with a pH value of 14, sight glass plates made of soda-lime glass or borosilicate glass are no longer recommended for safe and long-lasting operation. Here, for safety and cost reasons, the use of FEP protective discs is suitable.
FEP is very similar to PTFE in terms of material properties. The most significant difference is probably the transparency. Depending on its thickness, FEP is transparent to milky bluish. Due to its good light transmission, a process medium behind it can be easily recognised. By using an FEP protective screen, the aggressive process medium behind it cannot attack the pressure-bearing sight glass plate.
The transparency of FEP protective screens varies depending on the thickness. The process medium is always clearly visible in all delivery thicknesses. The application determines the thickness of the FEP protective screen.
Temperature: up to 200 °C / 392 °F
Pressure: depending on the area of application
Young's modulus: 30 N/mm²
Thermal conductivity at 23 °C / 73.4 °F: 0,25 W/(m·Kg)